William Paul Luther (born June 27, 1945) is an American politician and lawyer from Minnesota. Luther was a Democratic-Farmer-Labor Party (DFL) member of the United States House of Representatives representing Minnesota's 6th congressional district from January 3, 1995, to January 3, 2003, serving in the 104th, 105th, 106th, and 107th congresses, In 2006, Luther entered the DFL Party primary for the office of Minnesota Attorney General after endorsed candidate Matt Entenza withdrew from the race. He lost the primary to Lori Swanson.