William Blaine Luetkemeyer ( LOOT-kə-my-ər; born May 7, 1952) is an American politician serving as the U.S. representative for Missouri's 3rd congressional district since 2013, having represented Missouri's 9th congressional district from 2009 to 2013. A member of the Republican Party, Luetkemeyer formerly served as a member of the Missouri House of Representatives. On January 4, 2024, he announced he would not run for reelection in 2024.