SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

                                      Form N-1A    
 
REGISTRATION STATEMENT (NO. 33-49023)    
UNDER THE SECURITIES ACT OF 1933   [X]  
Pre-Effective Amendment No.   [ ]  
Post-Effective Amendment No. 22   [X]  
and    
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940  
Amendment No. 23   [X]  

VANGUARD ADMIRAL FUNDS

(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

Heidi Stam, Esquire

P.O. Box 876

Valley Forge, PA 19482

Approximate Date of Proposed Public Offering:  
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.  

PART C

VANGUARD ADMIRAL FUNDS

OTHER INFORMATION

Item 28. Exhibits

(a)   Articles of Incorporation, Amended and Restated Agreement and Declaration of Trust, filed on  
  December 23, 2008, Post-Effective Amendment No. 21, is hereby incorporated by reference.  
(b)   By-Laws, filed on December 23, 2008, Post-Effective Amendment No. 21, are hereby  
  incorporated by reference.  
(c)   Instruments Defining Rights of Securities Holders, reference is made to Articles III and V of  
  the Registrant’s Amended and Restated Agreement and Declaration of Trust, refer to Exhibit  
  (a) above.  
(d)   Investment Advisory Contract, The Vanguard Group, Inc. provides investment advisory  
  services to the Funds at cost pursuant to the Amended and Restated Funds’ Service  
  Agreement, refer to Exhibit (h) below.  
(e)   Underwriting Contracts, not applicable.  
(f)   Bonus or Profit Sharing Contracts, reference is made to the section entitled “Management of  
  the Funds” in Part B of this Registration Statement.  
(g)   Custodian Agreement, for The Bank of New York Mellon, filed on December 23, 2008, Post-  
  Effective Amendment No. 21, is hereby incorporated by reference.  
(h)   Other Material Contracts, Fifth Amended and Restated Funds’ Service Agreement, and the  
  Agreement and Plan of Reorganization, are filed herewith.  
(i)   Legal Opinion, not applicable.  
(j)   Other Opinions, Consent of an Independent Registered Public Accounting Firm, filed on  
  December 23, 2008, Post-Effective Amendment No. 21, is hereby incorporated by reference.  
(k)   Omitted Financial Statement, not applicable.  
(l)   Initial Capital Agreements, not applicable.  
(m)   Rule 12b-1 Plan, not applicable.  
(n)   Rule 18f-3 Plan, is filed herewith.  
(o)   Reserved.  
(p)   Code of Ethics, for the Vanguard Group, Inc., is filed herewith.  

Item 29. Persons Controlled by or under Common Control with Registrant

Registrant is not controlled by or under common control with any person.

Item 30. Indemnification

The Registrant’s organizational documents contain provisions indemnifying Trustees and officers against liability incurred in their official capacity. Article VII, Section 2 of the Amended and Restated Agreement and Declaration of Trust provides that the Registrant may indemnify and hold harmless each and every Trustee and officer from and against any and all claims, demands, costs, losses, expenses, and damages whatsoever arising out of or related to the performance of his or her duties as a Trustee or officer. Article VI of the By-Laws generally provides that the Registrant shall indemnify its Trustees and officers from any liability arising out of their past or present service in that capacity. Among other things, this provision excludes any liability arising by reason of willful misfeasance, bad faith, gross negligence, or the reckless disregard of the duties involved in the conduct of the Trustee’s or officer’s office with the Registrant.

C-1

Item 31. Business and Other Connections of Investment Adviser

The Vanguard Group, Inc. (Vanguard), is an investment adviser registered under the Advisers Act. The list required by this Item 26 of officers and directors of Vanguard, together with any information as to any business, profession, vocation, or employment of a substantial nature engaged in by such officers and directors during the past two years, is incorporated herein by reference from Schedules B and D of Form ADV filed by Vanguard pursuant to the Advisers Act (SEC File No. 801-11953).

Item 32. Principal Underwriters

(a)       Vanguard Marketing Corporation, a wholly-owned subsidiary of The Vanguard Group, Inc., is the principal underwriter of each fund within the Vanguard group of investment companies, a family of 37 investment companies with more than 150 funds.
(b)       The principal business address of each named director and officer of Vanguard Marketing Corporation is 100 Vanguard Boulevard, Malvern, Pennsylvania 19355.
Name   Positions and Office with Underwriter   Positions and Office with Funds  
R. Gregory Barton   Director and Senior Vice President   None  
Mortimer J. Buckley   Director and Senior Vice President   None  
F. William McNabb III   Chairman and Director   Chief Executive Officer, President, and  
    Trustee  
Michael S. Miller   Director and Managing Director   None  
Glenn W. Reed   Director   None  
George U. Sauter   Director and Senior Vice President   None  
Heidi Stam   Director and Senior Vice President   Secretary  
Richard D. Carpenter   Treasurer   None  
David L. Cermak   Principal   None  
Joseph Colaizzo   Financial and Operations Principal and Assistant   None  
  Treasurer    
Michael L. Kimmel   Secretary   None  
Sean P. Hagerty   Principal   None  
John C. Heywood   Principal   None  
Steve Holman   Principal   None  
Jack T. Wagner   Assistant Treasurer   None  
Jennifer M. Halliday   Assistant Treasurer   None  
Deborah McCracken   Assistant Secretary   None  
Joseph F. Miele   Registered Municipal Securities Principal   None  
Scott M. Bishop   Registered Municipal Securities Principal   None  
Bradley J. Sacco   Registered Municipal Securities Principal   None  
Jane K. Myer   Principal   None  
Pauline C. Scalvino   Chief Compliance Officer   Chief Compliance Officer  

(c)       Not applicable.

C-2

Item 33. Location of Accounts and Records

The books, accounts, and other documents required to be maintained by Section 31 (a) of the Investment Company Act and the rules promulgated thereunder will be maintained at the offices of the Registrant; the Registrant’s Transfer Agent, The Vanguard Group, Inc., 100 Vanguard Boulevard, Malvern, Pennsylvania 19355; and the Registrant’s Custodian, The Bank of New York Mellon, One Wall Street, New York, New York 10286.

Item 34. Management Services

Other than as set forth in the section entitled “Management of the Funds” in Part B of this Registration Statement, the Registrant is not a party to any management-related service contract.

Item 35. Undertakings

Not Applicable.

C-3

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the
Registrant hereby certifies that it meets all requirements for effectiveness of this Registration Statement
pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this Registration Statement to be
signed on its behalf by the undersigned, thereunto duly authorized, in the Town of Valley Forge and the
Commonwealth of Pennsylvania, on the 11th day of August, 2009 .

VANGUARD ADMIRAL FUNDS

BY:_________ /s/ F. William McNabb III* ____________

F. William McNabb III
Chief Executive Officer, President, and Trustee

Pursuant to the requirements of the Securities Act of 1933, this Post-Effective Amendment to the
Registration Statement has been signed below by the following persons in the capacities and on the date
indicated:

Signature                                   Title   Date  
 
/s/ John J. Brennan*   Chairman of the Board and     August 11, 2009  
  Trustee    
John J. Brennan      
/s/ F. William McNabb III*   Chief Executive Officer,     August 11, 2009  
President, and Trustee
F. William McNabb      
/s/ Charles D. Ellis*   Trustee   August 11, 2009  
Charles D. Ellis      
/s/ Emerson U. Fullwood*   Trustee   August 11, 2009  
Emerson U. Fullwood      
/s/ Rajiv L. Gupta*   Trustee   August 11, 2009  
Rajiv L. Gupta      
/s/ Amy Gutmann*   Trustee   August 11, 2009  
Amy Gutmann      
/s/ JoAnn Heffernan Heisen*   Trustee   August 11, 2009  
JoAnn Heffernan Heisen      
/s/ André F. Perold*   Trustee   August 11, 2009  
André F. Perold      
/s/ Alfred M. Rankin, Jr.*   Trustee   August 11, 2009  
Alfred M. Rankin, Jr.      
/s/ Peter F. Volanakis*   Trustee   August 11, 2009  
Peter F. Volanakis      
/s/ Thomas J. Higgins*   Chief Financial Officer   August 11, 2009  
Thomas J. Higgins      

*By: /s/ Heidi Stam

Heidi Stam, pursuant to a Power of Attorney filed on July 24, 2009, see File Number 2-88373, Incorporated by Reference.

INDEX TO EXHIBITS
Other Material Contracts , Fifth Amended and Restated Funds’ Service Agreement ...................... Ex-99.H  
Other Material Contracts , Agreement and Plan of Reorganization ................................................... Ex-99.H  
Rule 18f-3 Plan  ........................................................................................................................... Ex-99.N  
Code of Ethics for the Vanguard Group, Inc  ............................................................................... Ex-99.P  

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