Jeff Fitzgerald (born October 12, 1966) is an American businessman and politician who served as the 78th Speaker of the Wisconsin State Assembly during the 100th Wisconsin Legislature. A Republican, he represented the 39th Assembly District from 2001 until 2013. He ran for the United States Senate in 2012, but lost the Republican primary by a wide margin to former Governor Tommy Thompson. After leaving the Assembly, he became a lobbyist.