Form 485BPOS VANGUARD WORLD FUND

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form N-1A

REGISTRATION STATEMENT (NO. 2-17620) UNDER

THE SECURITIES ACT OF 1933

Post-Effective Amendment No. 166

and

REGISTRATION STATEMENT (NO. 811-01027) UNDER THE INVESTMENT COMPANY

ACT OF 1940

Amendment No. 166

VANGUARD WORLD FUND

(Exact Name of Registrant as Specified in Declaration of Trust)

P.O. Box 2600, Valley Forge, PA 19482

(Address of Principal Executive Office)

Registrant's Telephone Number (610) 669-1000

Anne E. Robinson, Esquire

P.O. Box 876

Valley Forge, PA 19482

It is proposed that this filing will become effective (check appropriate box)

[X]immediately upon filing pursuant to paragraph (b)

[ ] on (date) pursuant to paragraph (b)

[ ] 60 days after filing pursuant to paragraph (a)(1)

[ ] on , (date) pursuant to paragraph (a)(1)

[ ] 75 days after filing pursuant to paragraph (a)(2)

[ ] on (date) pursuant to paragraph (a)(2) of rule 485

If appropriate, check the following box:

[ ] This post-effective amendment designates a new effective date for a

previously filed post-effective amendment.

INDEX TO EXHIBITS
XBRL Instance Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	Ex-101.INS
XBRL Taxonomy Extension Schema Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	Ex-101.SCH
XBRL Taxonomy Extension Calculation Linkbase Document . . . . . . . . . . . . . . . . . . . .	Ex-101.CAL
XBRL Taxonomy Extension Definition Linkbase Document. . . . . . . . . . . . . . . . . . . . . .	Ex-101.DEF
XBRL Taxonomy Extension Labels Linkbase Document . . . . . . . . . . . . . . . . . . . . . . . .	Ex-101.LAB
XBRL Taxonomy Extension Presentation Linkbase Document . . . . . . . . . . . . . . . . . . .	Ex-101.PRE

January 13, 2020

U.S. Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

Re: Vanguard World Fund

File No. 2-17620

Commissioners:

Enclosed is Post-Effective Amendment No. 166 to the Registration Statement on Form N-1A for Vanguard World Fund, which we are filing pursuant to Rule 485(b) under the Securities Act of 1933. The sole purpose of the Amendment is to file the risk/return summary section of the Post-Effective Amendment in eXtensible Business Reporting Language (XBRL) for Vanguard FTSE Social Index Fund Admiral Share Class, a series and class of the the above mentioned Trust. This Amendment does not contain disclosures that would render it ineligible to become effective under 485(b). Pursuant to the requirements of Rule 485(b), this Amendment designates an immediate effective date of January 13, 2020.

If you have any questions or comments concerning the enclosed Amendment, please contact me at

(610)669-7310.

Sincerely,

Alexander F. Smith

Associate Counsel

The Vanguard Group, Inc.

Enclosures

cc: Lisa N. Larkin

U.S. Securities and Exchange Commission