FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * McNamara Stephen F   2. Issuer Name and Ticker or Trading Symbol ARMSTRONG WORLD INDUSTRIES INC [AWI] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Vice President and Controller (Last) (First) (Middle) C/O ARMSTRONG WORLD INDUSTRIES, INC., 2500 COLUMBIA AVENUE, P. O. BOX 3001 3. Date of Earliest Transaction (Month/Day/Year) 01/17/2017 (Street) LANCASTER, PA 17603 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 01/17/2017   M   886 A $ 0 (1) 3,854 D   Common Stock 01/17/2017   F   326 (2) D $ 41.8 3,528 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Restricted Stock Units

(1)

01/17/2017(3)

M

886

(3)

(3)

Common Stock

886

$ 0

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
McNamara Stephen F C/O ARMSTRONG WORLD INDUSTRIES, INC. 2500 COLUMBIA AVENUE, P. O. BOX 3001 LANCASTER, PA 17603			Vice President and Controller

Signatures

/s/Bryan Y. m. Tham, Attorney-in-fact		01/19/2017
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Reflects the conversion of previously granted restricted stock units into shares of Issuer's common stock in connection with the settlement of the restricted stock units. Each restricted stock unit represents a contingent right to receive one share of Issuer's common stock.
(2)	Represents the number of shares withheld by the Issuer to satisfy the Reporting Person's tax obligations upon the settlement of restricted stock units granted to the Reporting Person under the Issuer's 2011 Long-Term Incentive Plan.
(3)	The restricted stock units were granted to the Reporting Person on February 25, 2014 and vested on December 31, 2016. Settlement of the units for common shares and delivery of the vested shares to the Reporting Person took place on January 17, 2017.

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