April 7, 2021

Re: Vanguard Bond Index Funds (the “Trust”)
File No. 33-06001

Commissioners:

Pursuant to Rule 497(j) under the Securities Act of 1933, this letter serves as 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,

/s/Tiina Vaisanen

Tiina Vaisanen
Associate Counsel
The Vanguard Group, Inc.

Enclosures

cc: Lisa N. Larkin

U.S. Securities and Exchange Commission