Louis Hampton "Lou" Ritter (September 27, 1925 – April 9, 2010) was an American politician and lobbyist. He served as mayor of Jacksonville, Florida from 1965 until 1967. A Democrat, he assumed office when W. Haydon Burns, mayor since 1949, resigned to become Governor of Florida. He was the last mayor to serve his entire term before the city was consolidated with the Duval County government.
