Thomas Stockdale Rhea (1871–1946) was a Democratic politician from the U.S. Commonwealth of Kentucky. He served as Kentucky State Treasurer in 1912 and was state highway commissioner in the administration of Governor Ruby Laffoon. Known as "The Sage of Russellville" or "The Gray Fox", Rhea was a powerful Democratic political boss in the state. He was an unsuccessful candidate for governor in 1935, losing to A. B. "Happy" Chandler in the Democratic primary.