Gwendolynne Sophia Moore is an American politician serving as the U.S. representative for Wisconsin's 4th congressional district since 2005. In 2016, Moore was elected to serve as caucus whip of the Congressional Black Caucus for the 115th United States Congress. She is a member of the Democratic Party. Her district is based in Milwaukee and as a result of the 2011 redistricting also includes some Milwaukee County suburbs: Bayside, Brown Deer, Cudahy, Fox Point, Glendale, St. Francis, South Milwaukee, West Milwaukee, Shorewood, and Whitefish Bay. Moore is the first woman to represent the district and the second woman after Tammy Baldwin and the first African American elected to Congress from Wisconsin.

Wisconsin's 4th congressional district is a congressional district of the United States House of Representatives in Wisconsin, encompassing a part of Milwaukee County and including almost all of the city of Milwaukee, as well as its working-class suburbs of Cudahy, St. Francis, South Milwaukee, and West Milwaukee. Recent redistricting has added the Milwaukee County North Shore communities of Glendale, Shorewood, Whitefish Bay, Fox Point, Bayside, and Brown Deer to the district. It is currently represented by Gwen Moore, a Democrat.