Sarah R. Crespi State Street 1 Iron Street CCB 1102 Boston, MA 02210 Tel +1 617 662 2641 Sarah.Crespi@statestreet.com

July 19, 2017

Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

RE: iShares U.S. ETF Trust (the “Registrant”)

Securities Act File No. 333-179904

Investment Company Act File No. 811-22649

Ladies and Gentlemen:

On behalf of the Registrant and pursuant to Rule 497 under the Securities Act of 1933, as amended, attached for filing are exhibits containing interactive data format risk/return summary information that mirrors the risk/return summary information in the 497 filing, dated July 3, 2017 to the prospectuses for the following funds:

iShares Interest Rate Hedged 10+ Year Credit Bond ETF

iShares Interest Rate Hedged Corporate Bond ETF

iShares Interest Rate Hedged Emerging Markets Bond ETF

iShares Interest Rate Hedged High Yield Bond ETF

The purpose of this filing is to submit the 497 dated July 3, 2017 in XBRL.

If you have any questions regarding this filing, please contact Benjamin Haskin of Willkie Farr & Gallagher LLP at (202) 303-1124.

Very truly yours,

/s/ Sarah R. Crespi

Sarah R. Crespi

cc: Benjamin Haskin, Esq.