(Name of Registrant as Specified In Its Charter)

Dear Stockholder:

      On behalf of the Board of Directors of Arbitron Inc., I am pleased to invite you to attend the annual meeting of stockholders. The meeting will be held at the Ritz-Carlton Central Park, 50 Central Park South, New York, New York 10019, on Tuesday, May 24, 2005, at 9:00 AM local time.

      The Notice of Annual Meeting of Stockholders and the proxy statement that follow include information about the proposals recommended by Arbitron’s Board of Directors to elect eight (8) individuals to serve as directors of Arbitron.

      Our Board of Directors believes that a favorable vote for these directors at the annual meeting is in the best interests of Arbitron and its stockholders, and unanimously recommends a vote FOR the election of each of the director nominees. Accordingly, we urge you to review the accompanying materials carefully and to promptly vote your shares.

      It is important that your shares be represented at the meeting. Please promptly vote your shares by following the instructions on the enclosed proxy card to ensure that your vote is counted at the meeting.

      We look forward to seeing you at the meeting.

NOTICE OF ANNUAL MEETING OF STOCKHOLDERS

May 24, 2005

      Stockholders are entitled to one vote for each share of common stock held of record on the record date listed above. The proxy statement and the accompanying proxy card will be first mailed to stockholders on or about April 19, 2005.

      It is important that your shares be represented and voted at the meeting. You can vote your shares by completing and returning the enclosed proxy card. Most stockholders can also vote their shares over the Internet or by telephone. If Internet or telephone voting is available to you, voting instructions are printed on the enclosed proxy card. You can revoke a proxy at any time prior to its exercise at the meeting by following the instructions in the accompanying proxy statement. We appreciate your cooperation.

April 19, 2005

ARBITRON INC.

142 West 57th Street

New York, New York 10019

April 19, 2005

PROXY STATEMENT

       We will begin mailing this proxy statement to our stockholders on or about April 19, 2005.

      We are furnishing this proxy statement to our stockholders in connection with a solicitation of proxies by our Board of Directors for use at our 2005 annual meeting of stockholders to be held on Tuesday, May 24, 2005, at 9:00 AM local time at the Ritz-Carlton Central Park, 50 Central Park South, New York, New York 10019.

Who Can Vote

      If you held any of our common stock at the close of business on April 1, 2005, the record date for the annual meeting, you are entitled to receive notice of and to vote at our 2005 annual meeting. On that date, there were 31,371,421 shares of common stock outstanding. Our common stock constitutes the only class of securities entitled to vote at the meeting. Stockholders who have not exchanged their Ceridian Corporation common stock certificates for Arbitron Inc. common stock certificates in connection with the spin-off of Ceridian Corporation and Arbitron Inc. on March 30, 2001, will not be eligible to vote at the meeting.

Who Can Attend the Annual Meeting

      All holders of our common stock at the close of business on April 1, 2005, the record date for the annual meeting, or their duly appointed proxies, are authorized to attend the 2005 annual meeting. If you attend the meeting, you may be asked to present valid picture identification, such as a driver’s license or passport, before being admitted. Cameras, recording devices, and other electronic devices will not be permitted at the meeting.

      Please also note that if you hold your shares in “street name” (that is, through a bank, broker or other nominee), you will need to bring a copy of the brokerage statement reflecting your stock ownership as of April 1, 2005.

Quorum

      The presence of a majority of the outstanding shares of our common stock entitled to vote, in person or by proxy, is necessary to constitute a quorum. Abstentions and “broker nonvotes” will be considered present at the meeting for purposes of determining a quorum. A broker nonvote occurs when a bank or broker holding common stock for a beneficial owner does not vote on a particular matter because the bank or broker does not have discretionary voting power with respect to that item and has not received voting instructions from the beneficial owner.

Voting Rights

      Each share of our common stock that you hold entitles you to one vote on all matters that come before the annual meeting. Inspectors of election will count votes cast at the annual meeting.

      The eight director nominees receiving the highest number of votes will be elected. Stockholders who do not wish their shares to be voted for a particular nominee may indicate that in the space provided on the proxy card or by following the telephone or Internet instructions.

Voting by Participants in Arbitron Benefit Plans

      If you own Arbitron common stock as a participant in one or more of our employee benefit plans, you will receive a single proxy card that covers both the shares credited to your name in your plan account(s) and shares you own that are registered in your name. If any of your plan accounts are not in the same name as your shares of record, you will receive separate proxy cards for your record and plan holdings. Proxies submitted by plan participants in our 401(k) plan will serve as voting instructions to the trustees for the plan whether provided by mail, telephone or the Internet. In the absence of voting instructions from participants in the 401(k) plan, the trustees of the plan will vote the undirected shares in the same proportion as the directed shares.

Granting Your Proxy

      If you hold your shares in your own name as a holder of record, you can simplify your voting by voting via the Internet or calling the toll-free number listed on the enclosed proxy card. Internet and telephone voting information is provided on the proxy card. If you vote via the Internet or by telephone, please do not return a signed proxy card. If instead you choose to vote by mail, please mark the proxy card enclosed with the proxy statement, date and sign it, and mail it in the postage-paid envelope. The shares represented will be voted according to your directions. You can specify how you want your shares voted on the proposal by marking the appropriate boxes on the proxy card. Please review the voting instructions on the proxy card and read the entire text of the proposal and the position of the Board of Directors on such proposal in the proxy statement prior to making your vote. If you properly execute and return a proxy in the enclosed form, your stock will be voted as you specify. If your proxy card is signed and returned without specifying a vote on the election of directors, the proxy representing your common stock will be voted in favor of the proposed director nominees.

      If you hold your shares through a broker, bank or other nominee, you will receive separate instructions from the nominee describing the procedure for voting your shares.

Other Business

      No other matters are to be presented for action at the annual meeting other than the items described in this proxy statement. The enclosed proxy will, however, confer discretionary authority with respect to any other matter that may properly come before the meeting. The persons named in the enclosed proxy intend to vote as recommended by the Board of Directors or, if no recommendation is given, in accordance with their judgment on any matters that may properly come before the meeting.

Confidential Voting

      It is our policy that the individual stockholder votes are kept confidential prior to the final tabulation of the vote at our stockholders meeting if the stockholder requests confidential treatment. The only exceptions to this policy involve applicable legal requirements and proxy solicitations in opposition to the Board. Access to proxies and individual stockholder voting records is limited to the independent election inspectors (The Bank of New York), who may inform us at any time whether or not a particular stockholder has voted.

Revoking Your Proxy

      If you submit a proxy, you can revoke it at any time before it is exercised by giving written notice to our Corporate Secretary prior to the annual meeting or by timely delivery of a properly exercised, later-dated proxy (including an Internet or telephone vote). You may also attend the annual meeting in person and vote by ballot, which would cancel any proxy that you previously submitted.

Explanatory Note Regarding Ceridian Corporation

      Arbitron Inc. was formerly known as Ceridian Corporation (“Ceridian”). Prior to the close of trading on March 30, 2001, Ceridian was a publicly traded company, the principal lines of business of which were the human resource service businesses, the Comdata business, which provided transaction processing and regulatory compliance services for the transportation industry, and the media information business.

      On March 30, 2001, Ceridian completed a reverse spin-off, which we refer to as the “spin-off.” In connection with the spin-off, the assets and liabilities associated with the human resource service businesses and Comdata subsidiaries were transferred to a newly formed company named “New Ceridian.” The media information business stayed with Ceridian. Ceridian then distributed the stock of New Ceridian to all of Ceridian’s existing stockholders. As a result, New Ceridian is now a separate publicly traded corporation. In connection with the spin-off, Ceridian changed its name to Arbitron Inc. and effected a one-for-five reverse stock split, and New Ceridian changed its name to Ceridian Corporation. Because of the relative significance of the businesses transferred to New Ceridian, New Ceridian was considered the accounting successor to Ceridian for financial reporting purposes.

      You should rely only on the information provided in this proxy statement. We have not authorized anyone to provide you with different or additional information. You should not assume that the information in this proxy statement is accurate as of any date other than the date of this proxy statement or, where information relates to another date set forth in this proxy statement, then as of that date.

ELECTION OF DIRECTORS

(Proposal 1)

      Our business is managed under the direction of the Board of Directors, which is currently comprised of nine directors. The current terms of office of all of our directors expire at the 2005 annual meeting. Kenneth F. Gorman, a director of Arbitron since March 30, 2001, previously informed the Board of Directors that he did not intend to stand for reelection when his term expired in 2005. Accordingly, on February 24, 2005, the Board of Directors duly adopted a resolution to decrease the size of the Board of Directors from nine directors to eight directors, effective as of the date of the annual meeting. Our Board of Directors has renominated the other eight directors currently serving on the Board to serve as directors for a one-year term until the 2006 annual meeting of stockholders. Each of the nominees has consented to serve if elected.

      The Board of Directors recommends a vote FOR and solicits proxies in favor of each of the nominees named below. Proxies cannot be voted for more than eight people. Our Board has no reason to believe that any of the nominees for director will be unable or unavailable to serve. However, if any nominee should for any reason become unable or unavailable to serve, proxies will be voted for another nominee selected by the Board. Alternatively, proxies, at our Board’s discretion, may be voted for a fewer number of nominees as results from a director’s inability or unavailability to serve. Each person elected will hold office until the 2006 annual meeting of stockholders and until his or her successor is duly elected and qualified, or until earlier resignation or removal.

      The following is biographical information concerning the eight nominees for election as directors of Arbitron:

Nominees for Election of Directors

Alan W. Aldworth, age 50

Erica Farber, age 52

Philip Guarascio, age 63

Larry E. Kittelberger, age 56

Stephen B. Morris, age 61

Luis G. Nogales, age 61

Lawrence Perlman, age 67

Richard A. Post, age 46

Independence of Directors

      Under the listing standards of the New York Stock Exchange, and pursuant to our corporate governance policies and guidelines, we are required to have a majority of “independent” directors and a nominating/corporate governance committee, compensation committee and audit committee each comprised solely of independent directors. Pursuant to our corporate governance policies and guidelines

and the New York Stock Exchange listing standards, in order for a director to be deemed to be independent, the Board of Directors must affirmatively determine that a director has no material relationship with the Company (either directly or as a partner, shareholder or officer of an organization that has a relationship with the Company).

      The Board of Directors has evaluated the status of each director and, after broadly considering all facts and circumstances, affirmatively determined that Ms. Farber and Messrs. Aldworth, Gorman, Guarascio, Kittelberger, Nogales, Perlman and Post have no known relationship (material or otherwise) with the Company and are therefore “independent,” as such term is defined in the New York Stock Exchange’s listing standards. Mr. Morris is not independent as he is an employee of the Company.

Corporate Governance Policies and Guidelines and Codes of Ethics

      Corporate Governance Policies and Guidelines. We have adopted corporate governance policies and guidelines, which serve as guidelines and principles for the conduct of the Board of Directors. The corporate governance policies and guidelines, which meet the requirements of the New York Stock Exchange listing standards, address a number of topics, including, among other things, director qualification standards, director responsibilities, the responsibilities and composition of the Board committees, director access to management and independent advisers, director compensation, management succession and evaluations of the performance of the Board.

      Codes of Ethics. We have adopted a Code of Business Conduct & Ethics, which applies to all of our employees, officers and directors and meets the requirements for such code as set forth in the New York Stock Exchange listing standards. We have also adopted a Code of Ethics for the Chief Executive Officer and Financial Managers, which applies to our Chief Executive Officer, Chief Financial Officer and all managers in the Financial Organization of Arbitron and meets the requirements of a “code of ethics” as defined by the rules and regulations of the Securities and Exchange Commission.

      Where You Can Find These Documents. Our corporate governance policies and guidelines, Code of Ethics & Conduct and Code of Ethics for the Chief Executive Officer and Financial Managers are available on our Web site at www.arbitron.com and are also available in print to any stockholder who sends a written request to the Treasury Manager, Arbitron Inc., 9705 Patuxent Woods Drive, Columbia, Maryland 21046.

Executive Sessions of Nonmanagement Directors

      Consistent with the New York Stock Exchange listing standards, our corporate governance policies and guidelines provide that, in order to promote open discussion among nonmanagement directors, the Board of Directors will devote a portion of each regularly scheduled Board meeting to executive sessions without management participation. Lawrence Perlman, the Chairman of our Board of Directors, presides at such executive sessions. Our corporate governance policies and guidelines provide that if the group of nonmanagement directors includes directors who are not independent, as defined in the New York Stock Exchange’s listing standards, it is the Company’s policy that at least one such executive session convened per year shall include only independent directors.

Communicating with the Board of Directors

      Interested third parties may communicate with the Board of Directors by communicating directly with the Chairman of the Board of Directors (who serves as our presiding nonmanagement director at the executive sessions of nonmanagement directors) by e-mailing correspondence directly to the Chairman at nonmanagementdirectors@arbitron.com. The Chairman will decide what action should be taken with respect to the communication, including whether such communication will be reported to the Board of Directors.

Meetings of the Board of Directors

      The Board of Directors held six meetings in 2004, including by telephone conference, and acted by unanimous written consent one time in 2004. Each director attended at least 75% of the meetings of the Board of Directors and applicable committees on which they served held during the period that they served on the Board of Directors or such committees. In addition, pursuant to our corporate governance policies and guidelines, directors are expected to attend the annual meetings of stockholders. Last year, all of our directors attended the annual meeting of stockholders.

Committees of the Board of Directors

      The Board of Directors maintains six standing committees:

      Membership on the Audit Committee, the Compensation and Human Resources Committee, the Nominating Committee and the Corporate Governance Committee is limited to directors who are “independent” of Arbitron as that term is defined in the New York Stock Exchange’s listing standards and as affirmatively determined by the Board of Directors.

Executive Committee

      The following directors currently serve on the Executive Committee:

Lawrence Perlman, Chair

Kenneth F. Gorman

Stephen B. Morris

      The Executive Committee acts on matters that arise between Board meetings and require immediate action. All actions taken by this committee will be reported to, and ratified by, the Board of Directors. The Executive Committee met two times in 2004.

Audit Committee

      The following directors currently serve on the Audit Committee:

Richard A. Post, Chair

Alan W. Aldworth

Kenneth F. Gorman

Larry E. Kittelberger

      As required by the charter of the Audit Committee, all members of the Audit Committee qualify as “independent” directors within the meaning of the requirements of the New York Stock Exchange listing standards and Rule 10A-3 under the Securities and Exchange Act of 1934, as amended, and meet the experience and financial expertise requirements of the current listing standards of the New York Stock Exchange. The Board of Directors has determined that Richard A. Post is an “audit committee financial

expert” as defined by the rules and regulations of the Securities and Exchange Commission. The principal purposes of the Audit Committee are to:

      The Board of Directors has adopted a written charter for the Audit Committee. Nothing contained herein modifies the existing Audit Committee Charter. A copy of the Audit Committee’s charter is available on our Web site at www.arbitron.com and is available in print free of charge to any stockholder who requests it. You can obtain such a copy in print by contacting the Treasury Manager at Arbitron Inc., 9705 Patuxent Woods Drive, Columbia, Maryland 21046. The Audit Committee held 13 meetings in 2004, including by telephone conference.

Compensation and Human Resources Committee

      The following directors currently serve on the Compensation and Human Resources Committee:

Erica Farber, Chair

Philip Guarascio

Luis G. Nogales

      Each member of the Compensation and Human Resources Committee qualifies as an “independent” director under the current listing standards of the New York Stock Exchange. The principal purposes of the Compensation and Human Resources Committee are to have direct responsibility to:

      The Board of Directors has adopted an amended and restated charter for the Compensation and Human Resources Committee, a copy of which is available on our Web site at www.arbitron.com and is available in print free of charge to any stockholder who requests it. You can obtain such a copy in print by contacting the Treasury Manager at Arbitron Inc., 9705 Patuxent Woods Drive, Columbia, Maryland 21046. The Compensation and Human Resources Committee held five meetings in 2004.

Nominating Committee

      The following directors currently serve on the Nominating Committee:

Philip Guarascio, Chair

Erica Farber

Larry E. Kittelberger

Richard A. Post

      Each member of the Nominating Committee qualifies as an “independent” director under the current listing standards of the New York Stock Exchange. The principal purposes of the Nominating Committee are to:

      The Nominating Committee has approved, and the Board of Directors has adopted, policies and procedures to be used for considering potential director candidates to continue to ensure that our Board of Directors consists of a diversified group of qualified individuals who function effectively as a group. These policies and procedures provide that qualifications and credentials for consideration as a director nominee may vary according to the particular areas of expertise being sought as a complement to the existing composition of the Board of Directors. However, at a minimum, candidates for director must possess: (1) strength of character; (2) an ability to exercise independent thought, practical wisdom and mature judgment; (3) an ability to make independent analytical inquiries; (4) a willingness and ability to devote adequate time and resources to diligently perform Board of Director duties; and (5) a reputation, both personal and professional, consistent with the image and reputation of Arbitron. In addition to the aforementioned minimum qualifications, the Nominating Committee also believes that there are other factors that, while not prerequisites for nomination, should be taken into account when considering whether to recommend a particular person. These factors include: (1) whether the person possesses specific media and marketing expertise and familiarity with general issues affecting Arbitron’s business; (2) whether the person’s nomination and election would enable the Board of Directors to have a member that qualifies as an “audit committee financial expert” as such term is defined by the Securities and Exchange Commission; (3) whether the person would qualify as an “independent” director under the New York Stock Exchange’s listing standards and the Company’s corporate governance policies and guidelines; (4) the importance of continuity of the existing composition of the Board of Directors; and (5) the importance of a diversified Board membership, in terms of both the individuals involved and their various experiences and areas of expertise.

      The Nominating Committee seeks to identify director candidates based on input provided by a number of sources, including (i) Nominating Committee members, (ii) other directors of the Company, and (iii) stockholders of the Company. The Nominating Committee also has the authority to consult with or retain advisers or search firms to assist in the identification of qualified director candidates. The Nominating Committee currently employs a search firm to identify potential candidates that would broaden the skills and experience of the existing Board of Directors.

      As part of the identification process, the Nominating Committee takes into account the number of expected director vacancies and whether existing directors have indicated a willingness to continue to serve as directors if renominated. Once a director candidate has been identified, the Nominating Committee will then evaluate this candidate in light of his or her qualifications and credentials, and any additional factors that it deems necessary or appropriate. Existing directors who are being considered for renomination will be reevaluated as part of the Nominating Committee’s process of recommending director candidates.

      The Nominating Committee considers candidates recommended by stockholders in the same manner as all other director candidates. Stockholders who wish to suggest qualified candidates must comply with the advance notice provisions and other requirements of Article II, Section 13 of our bylaws. These notice provisions require that recommendations for directors must be received not less than 90 days nor more than 120 days prior to the date of the annual meeting of stockholders for the preceding year.

      After completing the identification and evaluation process described above, the Nominating Committee will recommend to the Board of Directors the nomination of a number of candidates equal to the number of director vacancies that will exist at the annual meeting of stockholders. The Board of Directors will then select director nominees for stockholders to consider and vote upon at the stockholders’ meeting.

      The Board of Directors has adopted an amended and restated written charter for the Nominating Committee, a copy of which is available on our Web site at www.arbitron.com and is available in print free of charge to any stockholder who requests it. You can obtain a copy in print by contacting the Treasury Manager at Arbitron Inc., 9705 Patuxent Woods Drive, Columbia, Maryland 21046.

      The Nominating Committee met once in 2004. Additionally, the then existing Nominating and Board Governance Committee met twice in 2004 before the Nominating and Board Governance Committee became two separate committees.

Corporate Governance Committee

      The following directors currently serve on the Corporate Governance Committee:

Lawrence Perlman, Chair

Alan W. Aldworth

Erica Farber

Kenneth F. Gorman

Philip Guarascio

Larry E. Kittelberger

Luis G. Nogales

Richard A. Post

      Each member of the Corporate Governance Committee qualifies as an “independent” director under the current listing standards of the New York Stock Exchange. The principal purposes of the Corporate Governance Committee are to:

      The Board of Directors has adopted an amended and restated written charter for the Corporate Governance Committee, a copy of which is available on our Web site at www.arbitron.com and is available in print free of charge to any stockholder who requests it. You can obtain a copy in print by contacting the Treasury Manager at Arbitron Inc., 9705 Patuxent Woods Drive, Columbia, Maryland 21046.

      The Corporate Governance Committee met three times in 2004. Additionally, the then existing Nominating and Board Governance Committee met twice in 2004 before the Nominating and Board Governance Committee became two separate committees.

Technology Strategy Committee

      The following directors serve on the Technology Strategy Committee:

Larry E. Kittelberger, Chair

Stephen B. Morris

Luis G. Nogales

Richard A. Post

      The principal purposes of the Technology Strategy Committee are to:

      The Technology Strategy Committee met five times in 2004.

Director Compensation

      Each director who is not also an employee of Arbitron or its subsidiaries is paid an annual retainer fee of $30,000, which is paid in quarterly installments. The nonemployee chair of the Audit Committee is paid a supplemental annual cash payment of $10,000; nonemployee chairs of the Compensation and Human Resources Committee, the Nominating Committee and the Technology Strategy Committee are paid a supplemental annual cash payment of $7,500. For each Board meeting attended, in person or by telephone, participating nonemployee directors receive $1,500. For each committee meeting attended, in person, participating nonemployee directors receive $1,500; and $750 for each committee meeting held by telephone.

      Each newly elected nonemployee director will receive a one-time grant of an option to purchase 15,000 shares of Arbitron common stock. These options will become exercisable in three equal installments of 5,000 shares over a three-year period and will expire 10 years from their date of grant. Beginning the year after initial election to the Board of Directors, each nonemployee director will also receive an annual grant of an option to purchase 7,000 shares of Arbitron common stock on the date of the annual meeting of stockholders. The exercise price per share of each option granted will be 100% of the fair-market value of the underlying Arbitron common stock on the date the option is granted. The options will be fully vested on the date of grant and become exercisable in full six months after their date of grant and will expire 10 years from the date of grant. The Chairman of the Board of Directors will also receive an annual stock option grant to purchase 10,000 shares in addition to the initial and annual option grants discussed above. These options will be fully vested on the date of grant and become exercisable in full six months after their date of grant and will expire 10 years from the date of grant.

      The Company previously has adopted a Nonemployee Director Incentive Program, as a component of its 1999 Stock Incentive Plan, which permits nonemployee directors to receive, at their discretion, either stock options or deferred stock units in lieu of their annual cash retainers and meeting fees. A director who elects to receive options receives a number of options based on a calculation approved by the Board of Directors. The formula for determining the number of option shares is to divide the cash fees earned in the quarter by the closing price of Arbitron stock on the date of the grant, which is the last trading day of the quarter. This amount is then multiplied by four to arrive at the number of option shares granted. A director who elects to receive deferred stock units receives a number of units based on a calculation approved by the Board of Directors. The formula for determining the number of deferred stock units is to multiply the cash fees earned in the quarter by 120% and divide the result by the closing price of Arbitron stock on the date of the grant, which is the last trading day of the quarter.

      It is also the philosophy of the Company that directors have a meaningful equity ownership in the Company. In 2004, the Board established ownership guidelines concerning director stock ownership. The guidelines are for each director to own four times the annual retainer paid to that director. These guidelines are expected to be achieved over five years and include all owned shares, as well as deferred stock units owned by the directors under the Company’s Director Deferred Compensation Plan, but outstanding and unexercised stock options are not counted.

      Directors who are also employees of Arbitron are not separately compensated for their service as directors.

Vote Required for Election of Directors

      The affirmative vote of a plurality of all the votes cast at the annual meeting, assuming a quorum is present, is necessary for the election of a director. Therefore, the eight individuals with the highest number of affirmative votes will be elected to the eight directorships. For purposes of the election of directors, abstentions and other shares not voted (whether by broker nonvote or otherwise) will not be counted as votes cast and will have no effect on the result of the vote.

Recommendation of the Board of Directors

      OUR BOARD OF DIRECTORS RECOMMENDS A VOTE FOR THE NOMINEES SET FORTH ABOVE.

EXECUTIVE COMPENSATION AND OTHER INFORMATION

Executive Officers

      Information concerning the persons who currently serve as Arbitron’s executive officers is provided below. Each of the named persons has been elected to the office indicated opposite the person’s name. The executive officers serve at the discretion of the Board of Directors. Officers generally are elected at the annual meeting of directors held immediately following the annual meeting of stockholders. The Board of Directors may elect additional executive officers from time to time.

Stephen B. Morris, age 61, President and Chief Executive Officer since March 30, 2001

Pierre C. Bouvard, age 43, President of Portable People Meter/ International since January 2005

Owen Charlebois, age 52, President of U.S. Media Services since March 30, 2001

Dolores L. Cody, age 53, Executive Vice President, Legal and Business Affairs, Chief Legal Officer and Secretary since March 30, 2001

Linda Dupree, age 46, Senior Vice President, Portable People Meter/ National Marketing Panel since March 1, 2003

Vaughan Scott Henry, age 43, Executive Vice President and Chief Information Officer since February 9, 2005

Claire L. Kummer, age 58, Executive Vice President of Operations since March 30, 2001

Kathleen T. Ross, age 52, Executive Vice President, Organization Effectiveness and Public Relations since March 30, 2001

William J. Walsh, age 59, Executive Vice President of Finance and Planning and Chief Financial Officer since March 30, 2001

Summary Compensation Table

      The following table shows the compensation paid by Arbitron and/or its direct and indirect subsidiaries, for the three fiscal years ended December 31, 2004, to Arbitron’s Chief Executive Officer and

each of the four other most highly compensated executive officers of Arbitron, based on 2004 compensation (the “Named Executive Officers”).

Option Grants in 2004

      The following table summarizes information regarding options granted to the Named Executive Officers of Arbitron in 2004.

Aggregated Option Exercises in Fiscal 2004 and Fiscal Year-End Option Values

      The following table summarizes information regarding the exercise of options to purchase Arbitron common stock during 2004 by the Named Executive Officers, as well as the December 31, 2004, value of unexercised options to purchase Arbitron common stock held by the Named Executive Officers.

Pension Plans

      Arbitron has established a voluntary, tax-qualified, defined benefit pension plan funded by employee and employer contributions. The plan covers Arbitron employees who, as of December 31, 2000, were eligible to participate in the Ceridian pension plan. The Ceridian plan was closed to new participants effective January 2, 1995. Benefits earned under the Ceridian plan prior to December 31, 2000, are payable from the Arbitron plan for participants employed by Arbitron on December 31, 2000. The amount of the annual benefit under Arbitron’s plan is based upon an employee’s average annual compensation during the employee’s highest consecutive five-year earnings period while participating in the Ceridian plan or the Arbitron plan. The plan provides a separate “SBC benefit formula” applicable to employees covered by a benefits agreement between Ceridian and International Business Machines Corporation. Because the Internal Revenue Code of 1986, as amended, limits the annual benefit that may be paid from tax-qualified plans such as Arbitron’s retirement plan, Arbitron also established a benefit equalization plan to provide retirees with supplemental benefits so that they will receive, in the aggregate, the benefits they would have been entitled to receive under the retirement plan had these limits not been in effect. Benefits earned under the Ceridian benefit equalization plan prior to December 31, 2000, are payable from the Arbitron plan for participants employed by Arbitron on December 31, 2000. Arbitron also established and funded a benefit protection trust to pay benefit equalization plan benefits.

      The following table shows estimated annual benefits payable under the pension plan and the benefit equalization plan to an employee who retires in 2005 at age 65:

Pension Plan Table

      Annual compensation for purposes of the pension plan and the benefit equalization plan consists of salary and any annual bonus paid during the year, less the amount contributed by the employee to the pension plan that year on a pretax basis. Compensation for 2004 covered by these plans for the Named Executive Officers who participate in the pension plan and benefit equalization plan was as follows: Mr. Morris: $935,102; Mr. Walsh: $355,338 and Ms. Dupree: $311,055. Messrs. Bouvard and Charlebois are not eligible to participate in the pension plan or the benefit equalization plan. For purposes of the pension plan and the benefit equalization plan, an annual bonus is considered part of annual compensation in the year in which it is paid, rather than the year in which it was earned (the latter formulation being the basis on which amounts are reported in the Summary Compensation Table).

      As of December 31, 2004, years of credited service for the Named Executive Officers were as follows: Mr. Morris: 10 years; Mr. Walsh: 40.39 years; and Ms. Dupree: 14.72 years.

      Benefit amounts in the Pension Plan Table above are computed assuming payments are made on the normal life annuity basis and not under any of the various survivor options. Benefits listed in the table are not subject to deduction for Social Security or other offset amounts. Mr. Walsh is eligible for benefits as computed under the SBC benefit formula. This formula generally provides for benefits slightly lower than those shown in the table above.

401(k) Plan

      Arbitron has established a 401(k) plan that permits participating employees to contribute a portion of their compensation to the plan on a pretax basis. Arbitron makes matching contributions in amounts determined by Arbitron.

      The 401(k) plan accounts are invested among a number of available investment options, including shares of Arbitron common stock, according to the directions of the participating employees. Voting and tender rights with respect to shares of Arbitron common stock credited to participants’ accounts will be passed through to the participants.

      While employed, participating employees may access their accounts through loans and, in some cases, in-service withdrawals. Following termination of employment, benefits are either distributed in a lump-sum payment or, if minimum requirements are met, can be kept in the plan. To the extent a participant’s account is invested in full shares of Arbitron’s common stock, the shares may be distributed to the participant.

      Arbitron retains the right to amend or terminate the 401(k) plan at any time.

Deferred Compensation Plan

      Right to Defer Compensation. Ceridian maintained a nonqualified deferred compensation plan. Arbitron established a similar deferred compensation plan effective January 1, 2001. The accounts of four Arbitron employees who were participants in the Ceridian plan were transferred to the Arbitron plan. The Arbitron plan was immediately closed to further participation by Arbitron employees, including those with existing accounts, on January 1, 2001.

      Distributions. Distributions of deferred credit account balances will normally be made only upon a participant’s severance, retirement or disability, and will generally be made in a lump-sum payment except in circumstances relating to retirement or disability for which a participant can elect payment in annual installments of five, 10 or 15 years. However, in-service distributions are permitted.

      Effect of Death of a Participant. Upon the death of a participant, the entire balance of the participant’s accounts will be paid to the beneficiary(ies) designated by the participant, plus an insurance benefit equal to two times the deferred compensation.

      Administration of the Plan. The plan is administered by a person or committee designated by Arbitron who has the discretionary authority to adopt rules, policies, practices or procedures with respect to the plan as it may deem necessary or advisable.

      Amendment and Termination of the Plan. Arbitron reserves the right to amend or terminate the plan at any time, except that no amendment or termination may adversely affect the rights of the participants with respect to amounts deferred prior to the amendment or termination.

Executive Employment Agreements and Change of Control Agreements

      Mr. Morris currently has an employment agreement with Arbitron, the terms of which are described below. None of the other Named Executive Officers of Arbitron have an employment agreement with Arbitron, but two of them have retention agreements as described below. Mr. Morris’s employment agreement contains provisions regarding protection of confidential information, rights in any intellectual property created by him, restrictions on competition and change of control compensation.

      The agreement with Mr. Morris currently expires on April 1, 2007, or, in the event a change of control of Arbitron occurs before April 1, 2007, the date two years after such change of control. The agreement with Mr. Morris automatically renews for successive three-year terms upon expiration. Mr. Morris’s annual base salary is required to be a minimum of $435,000 under the agreement.

      If Arbitron terminates the agreement with Mr. Morris without cause and the termination is not a change of control termination, Mr. Morris will be entitled to receive payment equal to two years’ base salary and two times the bonus, if any, that Mr. Morris would have received for the year in which the termination occurs, at the higher of the target award applicable to the year in which the termination occurs or the average of the actual bonuses paid for the last three fiscal years. In addition, the agreement with Mr. Morris also contains provisions with regard to payments to be made if termination occurs due to death or disability. If Mr. Morris experiences a change of control termination, he will be entitled to receive a lump-sum payment that is equal to three times each of the following:

      For two years following a termination without cause, or for three years or until reemployment with benefits following a change of control termination, Mr. Morris shall be provided with the same or equivalent health, dental, accidental death and dismemberment, short-term and long-term disability, life insurance coverages, and all other insurance policies and other health and welfare benefits programs he was entitled to immediately prior to his termination.

      The agreement with Mr. Morris provides him with the opportunity to receive additional supplemental retirement benefits. The amount of annual supplemental retirement benefits provided under the agreement is determined substantially by multiplying the number of years of employment, giving credit from 1994, by a percentage of Mr. Morris’s final average earnings and subtracting from this gross amount an offset amount to produce the annual benefit that actually would be payable. The offset amount consists of the annual amounts payable to Mr. Morris under the Arbitron Inc. Retirement Plan (a tax-qualified, defined benefit plan), the Arbitron benefit equalization plan and the tax-qualified pension plan of any of Mr. Morris’s previous employers. If Mr. Morris experiences a change of control termination, Mr. Morris will receive credit adding three years to age and service for purposes of determining the supplemental pension payable under the agreement.

      The term “change of control termination” means the termination of Mr. Morris’s employment with Arbitron, by Arbitron or the executive, within two years after a change of control for any reason other than conduct that constitutes fraud, misrepresentation, theft, or embezzlement of Arbitron assets, an intentional violation of law involving moral turpitude or failure to follow Arbitron’s conduct and ethics policies. A change of control termination includes termination of employment within two years after a change of control by reason of death or disability.

      Upon a change of control, the vesting and exercisability of stock options, and the vesting of other awards under Arbitron’s stock-based compensation plans, will accelerate.

      Further, upon a change of control, whether or not there is a change of control termination, all of Mr. Morris’s options granted prior to January 1, 2003 (“Eligible Options”) will fully and immediately vest and Mr. Morris will be entitled to a cash payment equal to the sum of:

      The term “Black-Scholes termination value” will mean, with respect to each Eligible Option, the difference between:

      For the purposes described above, a “change of control” is generally defined as any of the following:

      If payments to Mr. Morris under the employment agreement would result in imposition of an excise tax under section 4999 of the Internal Revenue Code of 1986, as amended, Mr. Morris would receive an additional payment to compensate for the imposition of the tax. The payment shall be in an amount such that after the payment of all taxes, income and excise, Mr. Morris will be in the same after-tax position as if no excise taxes under the Internal Revenue Code had been imposed.

Retention Agreements

      Messrs. Bouvard and Charlebois have entered into retention agreements with us that provide for severance payments under some circumstances and for payments with respect to stock options upon a change of control.

      The agreements provide that if the executive officer is terminated other than for cause, and the termination is not a change of control termination, the executive will receive a lump-sum cash payment in the amount of 12 months of base salary and bonus if the executive has fewer than 15 years of service, or 15 months of base salary and bonus if the executive has 15 or more years of service. The agreements provide that following a change of control termination, the executive will be entitled to receive a lump-sum payment that is equal to 18 months of base salary and bonus if the executive has fewer than 15 years of service, or 21 months of base salary and bonus if the executive has 15 or more years of service. (For purposes of the Retention Agreements, change of control termination excludes the executive’s failure to perform the duties reasonably assigned by the Chief Executive Officer.)

      In addition, the executive shall be provided, for a period of between 12 and 21 months following termination without cause or a change of control termination, or, if sooner, until reemployment with equivalent benefit, with the same or equivalent health, dental, accidental death and dismemberment, short-term and long-term disability, life insurance coverage, and all other insurance and other health and welfare benefits programs he or she was entitled to on the day before the termination.

      Upon a change of control, the vesting and exercisability of stock options and the vesting of other awards under Arbitron’s stock-based compensation plans will accelerate.

      Upon a change of control, the executive will be entitled to a cash payment equal to the sum of:

      For purposes of these retention agreements, a “change of control” is generally defined as any of the following:

      If payments to an executive under such a retention agreement would result in imposition of an excise tax under section 4999 of the Internal Revenue Code of 1986, as amended, the executive will also be entitled to be paid an amount to compensate for the imposition of the tax. The payment shall be in an amount such that after payment of all taxes, income and excise, the executive will be in the same after-tax position as if no excise tax under the Internal Revenue Code of 1986, as amended, had been imposed.

Compensation Committee Interlocks and Insider Participation

      Erica Farber, Philip Guarascio and Luis G. Nogales served on the Compensation and Human Resources Committee of the Board of Directors during 2004. None of these individuals was, or ever has been, an employee of Arbitron or any of its subsidiaries. No interlocking relationship existed between Ms. Farber, Mr. Guarascio or Mr. Nogales and any member of any other company’s board of directors, board of trustees or compensation committee during that period.

STOCKHOLDER RETURN PERFORMANCE GRAPH

      Presented below is a line graph comparing the cumulative total stockholder return of Arbitron common stock with the total return of the New York Stock Exchange Composite Index and the S&P Small Cap 600 Index starting on April 2, 2001, the date on which Arbitron’s common stock commenced trading on the New York Stock Exchange. This graph assumes that $100 was invested in each of Arbitron’s common stock, the New York Stock Exchange Composite Index and the S&P Small Cap 600 Index on April 2, 2001, and that all dividends were reinvested.

REPORT OF COMPENSATION AND HUMAN RESOURCES COMMITTEE

      The Compensation and Human Resources Committee, of which the undersigned are members, is responsible for establishing and administering the compensation program for Arbitron’s executive officers. All committee members are independent directors of Arbitron. The Committee met five times in 2004, including one executive session without representatives of management. A nationally recognized independent compensation consultant has been retained by the Committee, and generally attends the Committee meetings.

Compensation Philosophy

      The executive compensation program is designed to:

      The program has three elements that constitute total direct compensation for executives:

      The compensation philosophy for Arbitron executives is to target roughly the 50th percentile for base salary and target roughly the 75th percentile for total direct compensation (base salary, bonus and long-term incentives) for achieving superior personal and company performance goals. There is opportunity to exceed these targeted levels of compensation for superior performance in relation to company and individual goals, along with corresponding risk for underachievement.

      Each year the Committee reviews information regarding competitive compensation levels and practices for positions comparable to Arbitron’s executive officer positions. This information is obtained from nationwide compensation surveys and other analyses of peer company disclosure documents. Peer companies include selected labor and/or capital-market competitors of broadly similar size and value that have comparable pay models to Arbitron, and are not necessarily those companies included in the performance graph on page 21.

      It is also the philosophy of the Company that executives should have a meaningful equity ownership in the company. During 2004, the Committee recommended and the Board established ownership guidelines covering executives. The ownership guideline for the CEO (Mr. Morris) is three times base salary, and the guideline for other executive officers is ownership of common stock with a value range of one-to-two times salary, depending on position level. These guidelines are expected to be achieved over three years, and include owned shares but not outstanding unexercised stock options.

Base Salary

      The annual determination of an executive officer’s salary is based on the Committee’s assessment of the following factors:

      The 2004 base salaries established for executive officers were generally within the target range described above.

Annual Incentive Bonus

      The determination of an executive officer’s annual bonus is based on the Committee’s assessment of the overall performance of the company with regard to earnings per share, revenues, strategic objectives, and an assessment of the achievement of preestablished individual goals.

      For 2004, the target bonus percentage established for executive officers other than Mr. Morris ranged from 40% to 50% of base salary. Mr. Morris’ target award was 70% of salary. The potential range of earned awards is from zero-to-two times target, based on company and individual performance. For 2004, actual earned bonuses were on average slightly above target, in light of the Company’s performance in terms of earnings per share, revenue and progress in key business initiatives.

Long-Term Incentive Compensation

      Long-term incentives for executive officers consisted of stock option grants in 2004. The determination of an executive officer’s grant level, within the range prescribed for his or her position based on competitive annual grant values, reflects the Committee’s subjective assessment of the responsibilities of the position, performance of the individual, and past grant history.

      The Committee believes that the annualized value of options granted to executive officers during 2004 is consistent with Arbitron’s pay philosophy. Furthermore, the Committee believes that stock options are an effective vehicle to reward executives for increasing long-term stockholder value and encouraging employment retention. It is the Committee’s intent to grant competitive long-term incentives on an annual basis, as was done in 2004, rather than aggregating the annual values and making grants every three years, as was done following the spin-off transaction in 2001.

Chief Executive Officer Compensation

      In the Committee’s view, Mr. Morris’ total direct compensation is consistent with the company’s pay philosophy, company performance, and his individual performance. The competitive data for 2004 indicate that he is moderately above the market median. During 2004, Mr. Morris’ accomplishments considered by the Committee in determining his compensation included the Company’s earnings per share, growth, revenue growth, and significant progress against strategic initiatives.

Deductibility of Executive Compensation

      The Committee has considered the potential impact of Section 162(m) (the “Section”) of the Internal Revenue Code of 1986, as amended, adopted under the Federal Revenue Reconciliation Act of 1993. The Section disallows any tax deduction by a publicly held corporation for individual compensation exceeding $1 million in any taxable year for any Named Executive Officer, all of whom are “covered employees” under the Section, unless compensation is performance-based. The targeted cash compensation of each of the Named Executive Officers is below the $1 million threshold. Furthermore, the Committee believes that any options granted will be characterized as performance-based under the Section. The Committee therefore believes that the Section will not materially reduce any tax deduction available to Arbitron. Although Arbitron will be mindful of the limits imposed by the Section, Arbitron nevertheless reserves the right to pay compensation that may exceed the limitation on deductions imposed by the Section.

REPORT OF THE AUDIT COMMITTEE

      The role of the Audit Committee is to assist the Board of Directors in its oversight of the Company’s financial reporting process. Management has the primary responsibility for the financial statements and the reporting process, including the systems of internal controls. The Company’s independent registered public accountants are responsible for auditing the Company’s financial statements and expressing an opinion as to their conformity to accounting principles generally accepted in the United States.

      The Audit Committee has reviewed and discussed the audited consolidated financial statements of Arbitron for fiscal year 2004 with Arbitron’s management, and also has discussed with KPMG LLP, Arbitron’s independent auditors, the matters required to be discussed by Statement on Auditing Standards No. 61. The Audit Committee has received both the written disclosures and the letter from KPMG LLP required by Independence Standards Board Standard No. 1, and has discussed with KPMG LLP the independence of KPMG LLP from Arbitron. In addition, the Audit Committee has considered whether the provision of nonaudit services, and the fees charged for such nonaudit services, by KPMG LLP are compatible with maintaining the independence of KPMG LLP from Arbitron, and determined that they are compatible with independence.

      The Audit Committee discussed with the Company’s internal and independent accountants the overall scope and plans for their respective audits. The Audit Committee meets with the internal auditors and independent accountants, with and without management present, to discuss the results of their examinations, their evaluations of the Company’s internal controls and the overall quality of the Company’s financial reporting. In addition, the Audit Committee met with the Chief Executive Officer, Chief Financial Officer and the Vice President, Accounting Services and Treasury of the Company to discuss the processes they have undertaken to evaluate the accuracy and fair presentation of the Company’s financial statements and the effectiveness of the Company’s system of disclosure controls and procedures.

      In reliance on the reviews and discussions referred to above and based on the foregoing, the Audit Committee recommended to Arbitron’s Board of Directors that the audited consolidated financial statements of Arbitron for fiscal year 2004 be included in Arbitron’s Annual Report on Form 10-K for the year ended December 31, 2004.

STOCK OWNERSHIP INFORMATION

Stock Ownership of Arbitron’s Directors and Executive Officers

      The following table sets forth the number of shares of Arbitron common stock beneficially owned, directly or indirectly, as of April 1, 2005, by (i) our current directors, (ii) the Named Executive Officers, and (iii) our directors and executive officers as a group. Each person has sole voting and investment power with respect to the shares listed unless otherwise indicated. The percentages below are based on the number of shares of Arbitron common stock issued and outstanding as of April 1, 2005.

Stock Ownership of Arbitron’s Principal Stockholders

      The following table sets forth the number of shares of Arbitron common stock beneficially owned, directly or indirectly, by each person known to Arbitron to beneficially own more than 5% of Arbitron’s outstanding common stock. This information is based solely upon the beneficial ownership of these persons as reported to Arbitron as of the date of the most recent Schedule 13D or 13G filed with the Securities and Exchange Commission on behalf of such persons. Each person has sole voting and investment power with respect to the shares listed unless otherwise indicated. The percentages below are based on the number of shares of Arbitron common stock issued and outstanding as of April 1, 2005.

CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

      There were no transactions between Arbitron and its directors, executive officers or 5% stockholders in 2004.

INDEPENDENT AUDITORS AND AUDIT FEES

      The Audit Committee of the Board of Directors has selected KPMG LLP, our current independent auditors, to serve as our independent auditors for the year ending December 31, 2005.

      The Board of Directors has requested that representatives of KPMG LLP attend the annual meeting, and they are expected to attend. These representatives will have an opportunity to make a statement if they desire to do so, and will be available to respond to stockholder questions.

      The following table sets forth the aggregate fees billed to Arbitron for services rendered during, or in connection with, the fiscal years ended December 31, 2004, and 2003 by KPMG LLP:

Preapproval Policies and Procedures

      The Audit Committee’s policy is to specifically review and preapprove any engagement of the independent auditors to provide any audit or permissible nonaudit service to Arbitron. In the event that

preapproval is required prior to a scheduled meeting, the Audit Committee has delegated authority to its Chairman to specifically preapprove engagements for the performance of nonaudit services, provided that the estimated cost for such services is less than $10,000. If the Chairman is not available, another member of the Audit Committee may preapprove such nonaudit service engagement. All decisions made under this delegation of authority are required to be reported to the full Audit Committee for ratification at the next scheduled meeting.

OTHER MATTERS

Arbitron Mailing Address

      Our current mailing address is 142 West 57th Street, New York, New York 10019.

Multiple Stockholders Sharing the Same Address

      We are sending only one annual report and proxy statement to stockholders that share a single address unless we received contrary instructions from any stockholder at that address. This practice, known as “householding,” is designed to reduce our printing and postage costs. However, if any stockholder residing at such an address wishes to receive a separate annual report or proxy statement in the future, they may telephone Arbitron’s Treasury Manager at (410) 312-8278 or write to him at 9705 Patuxent Woods Drive, Columbia, Maryland 21046. If you did not receive an individual copy of this proxy statement or our annual report and you wish to do so, we will send you a copy if you contact Arbitron’s Treasury Manager in the same manner. In addition, if you are receiving multiple copies of our annual report and proxy statement, you can request householding by contacting Arbitron’s Treasury Manager in the same manner.

Stockholder Proposals for Next Year’s Annual Meeting

      If you want us to consider including a stockholder proposal in next year’s proxy statement, you must deliver such proposal in writing to Dolores L. Cody, Executive Vice President, Legal and Business Affairs, Chief Legal Officer and Corporate Secretary, no later than December 12, 2005.

      Any other matters proposed to be submitted for consideration at next year’s annual meeting of stockholders (other than a stockholder proposal included in our proxy materials pursuant to Rule 14a-8 of the rules promulgated under the Securities Exchange Act of 1934, as amended) must be given in writing to our Corporate Secretary and received at our principal executive offices not less than 90 days nor more than 120 days prior to the date of the 2006 annual meeting of stockholders. The proposal must contain specific information required by our bylaws, which are on file with the Securities and Exchange Commission and may be obtained from our Corporate Secretary upon written request. If a stockholder proposal is received before or after the range of dates specified above, our proxy materials for the next annual meeting of stockholders may confer discretionary authority to vote on such matter without any discussion of the matter in the proxy materials.

Director Nominations

      In accordance with procedures and requirements set forth in Article II, Section 13 of our bylaws, stockholders may propose nominees for election to the Board of Directors only after providing timely written notice to the Corporate Secretary, as set forth in the immediately preceding paragraph above. The notice must set forth:

Proxy Solicitation

      We have retained Georgeson Shareholder Communications Inc. to assist with the solicitation of proxies for a fee not to exceed $7,500, plus reimbursement of out-of-pocket expenses. We will pay all expenses of soliciting proxies for the 2005 annual meeting. In addition to solicitations by mail, we have made arrangements for brokers, custodians, nominees and other fiduciaries to send proxy materials to their principals and we will reimburse them for their reasonable out-of-pocket expenses in doing so. Certain of our employees, who will receive no additional compensation for their services, may also solicit proxies by telephone, telecopy, personal interview or other means.

Section 16(a) Beneficial Ownership Reporting Compliance

      Section 16(a) of the Securities Exchange Act of 1934, as amended, requires our directors and executive officers, and persons who own more than 10% of a registered class of our equity securities, to file initial reports of ownership and reports of changes in ownership of common stock and other equity securities of Arbitron with the Securities and Exchange Commission and the New York Stock Exchange. Such reporting persons are required by the Securities and Exchange Commission to furnish us with copies of all Section 16(a) reports they file. To our knowledge, based solely upon a review of Section 16(a) reports furnished to us for 2004, and/or on written representations from certain reporting persons that no reports were required, we believe that, other than as described below, our directors, executive officers and greater than 10% stockholders complied with all Section 16(a) filing requirements applicable to them with respect to transactions during 2004.

      Mr. Stephen Morris, Arbitron’s President and Chief Executive Officer, inadvertently failed to timely file a Form 4 disposing of 44,300 shares of Arbitron common stock in February 2004. A report was filed promptly upon the discovery of this oversight. Mr. Kenneth Gorman, a director of Arbitron, inadvertently failed to timely file a Form 4 reporting the grant of 5,000 options on December 31, 2004. A report was filed promptly upon the discovery of this oversight. Mr. Richard Post, a director of Arbitron, inadvertently failed to timely file a Form 4 reporting the grant of 5,000 options on December 31, 2004. A report was filed promptly upon the discovery of this oversight. The Company had been authorized to make these filings on behalf of Messrs. Morris, Gorman and Post; however, the reports were not filed in a timely manner.

Annual Report

      Copies of our annual report for the year ended December 31, 2004, are being distributed to our stockholders simultaneously with the delivery of this proxy statement.

Your vote is important.
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Your Internet or telephone vote authorizes the named proxies to vote your shares in the same manner as if you marked, signed and returned your proxy card. If you have submitted your proxy by telephone or the Internet there is no need for you to mail back your proxy card.

THE INTERNET AND TELEPHONE VOTING FACILITIES WILL CLOSE AT 5:00 P.M. E.T. ON MAY 23, 2005.

6 DETACH PROXY CARD HERE IF YOU ARE NOT VOTING BY TELEPHONE OR INTERNET 6

 

The undersigned hereby instructs said proxies or their substitutes to:

The Board of Directors recommends a vote FOR each of the nominees for director.

 

ARBITRON INC.
PROXY CARD

This proxy is solicited on behalf of the Board of Directors
of Arbitron Inc. for the annual meeting of stockholders on May 24, 2005.

      The undersigned hereby appoints William J. Walsh and Dolores L. Cody and either of them, as the proxies of the undersigned, with full power of substitution in each, to vote at the annual meeting of stockholders to be held on May 24, 2005, and at any adjournment or postponement thereof all of the undersigned’s shares of common stock of Arbitron Inc. held of record on April 1, 2005, in the manner indicated on the reverse side hereof.

      The undersigned hereby acknowledges receipt of the accompanying Notice of Annual Meeting of Stockholders and Proxy Statement.

      You are encouraged to specify your choices by marking the appropriate boxes on the reverse side.

(Continued, and to be signed and dated on the reverse side.)

ARBITRON INC.
P.O. BOX 11367
NEW YORK, NY 10203-0367