Mike Simpson, American dentist and politician
Michael Keith Simpson (born September 8, 1950) is an American politician and former dentist serving as the U.S. representative for Idaho's 2nd congressional district since 1999. The district covers most of the eastern portion of the state, including Idaho Falls, Pocatello, Sun Valley, Twin Falls and the northern two-thirds of Boise.

A member of the Republican Party, Simpson was first elected to public office in 1984, and was elected to the House in the 1998 elections, succeeding Mike Crapo. He served as Speaker of the Idaho House of Representatives from 1992 to 1998.