Thomas Linehan was an Irish politician. He was a member of Seanad Éireann from 1922 to 1936. He was first elected to the Seanad in 1922 as a Farmers' Party candidate. He was re-elected at the 1925 Seanad election for 12 years and served until the Free State Seanad was abolished in 1936. He was an independent member from 1928 onwards.