Ex.99.906 CERT

N-CSR Exhibit for Item 12(b): CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Martin Small, President (Principal Executive Officer), and Jack Gee, Treasurer and Chief Financial Officer (Principal Financial Officer), of iShares U.S. ETF Trust (the “Registrant”), each certify that:

1. The Registrant’s periodic report on Form N-CSR for the period ended October 31, 2016 (the “Form N-CSR”) fully complies with the requirements of Section 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Form N-CSR fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

Date: December 29, 2016	/s/ Martin Small	President (Principal Executive Officer)
	Martin Small [Signature]	[Title]

Date: December 29, 2016	/s/ Jack Gee	Treasurer and Chief Financial Officer (Principal Financial Officer)
	Jack Gee [Signature]	[Title]