Thomas Jefferson Cunningham (March 17, 1852 – April 28, 1941) was an American newspaper publisher, historian, and politician. He was the 14th Secretary of State of Wisconsin, and served three years as mayor of Chippewa Falls, Wisconsin. He was a prominent member of the Democratic Party of Wisconsin and was a delegate to every Democratic National Convention from 1880 and 1940. In his role as Secretary of State, he was the namesake for a set of Wisconsin Supreme Court decisions, known as the "Cunningham cases", which set legal standards in the state for redistricting.