Steven Leslie Kagen is an American politician and physician who was the U.S. representative for Wisconsin's 8th congressional district from 2007 to 2011. He is a member of the Democratic Party. He was defeated in his bid for re-election in 2010 by Reid Ribble, who succeeded him on January 3, 2011. The district is located in the northeastern part of the state and includes Green Bay and Appleton.

Wisconsin's 8th congressional district is a congressional district of the United States House of Representatives in northeastern Wisconsin. It officially has been vacant since April 24, 2024, following the effective date of the resignation of Mike Gallagher, a Republican. Gallagher won the open seat vacated by Reid Ribble who retired in 2016. It is also one of only two congressional districts to ever elect a Catholic priest, in the case of Wisconsin’s 8th, Robert John Cornell.