UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Notice of Effectiveness
Effectiveness Date:	September 5, 2012 10:30 A.M.

Form:	N-1A
CIK: 0001524513 Company Name: iShares U.S. ETF Trust File Number: 333-179904 REFERENCED SERIES/CLASSES (CONTRACTS) Series ID Class/Contract Name S000037042 iShares Ultrashort Duration Bond Fund C000113876 iShares Ultrashort Duration Bond Fund