May 1, 2008

U.S. Securities & Exchange Commission
100 F Street, N.E.
Washington, DC 20549

RE: VANGUARD INDEX FUNDS (THE TRUST)
FILE NO. 2-56846

Ladies and Gentlemen:

Transmitted herewith pursuant to Rule 497(j) under the Securities Act of 1933 is certification that the Prospectus and Statement of Additional Information with respect to the above-referenced Trust do not differ from that filed in the most recent post-effective amendment, which was filed electronically.

Sincerely,

Barry Mendelson
Principal and Senior Counsel
The Vanguard Group, Inc.

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