William Leighton Carss, (February 15, 1865 – May 31, 1931) was a U.S. Representative from Minnesota; born in Pella, Marion County, Iowa and subsequently moved with his parents to Des Moines, Iowa, in 1867. There he attended the public schools, studied civil and mechanical engineering and followed that profession for a number of years. He moved to St. Louis County, Minnesota in 1893 and settled in Proctor where he found work as a locomotive engineer and became a member of the Brotherhood of Locomotive Engineers. Carss was elected as a Farmer-Labor candidate to the 66th congress (March 4, 1919 – March 3, 1921) from Minnesota's 8th congressional district.