Thomas Joseph Tehan (18 January 1916 – 1 June 1996) was an Australian politician. Born in Kyabram, Victoria, he was educated at the University of Melbourne before becoming a barrister and solicitor. In 1975 he served as leader of the Victorian branch of the National Country Party. Later that year, he was elected to the Australian Senate as an NCP Senator for Victoria. He was defeated in 1977, when he was third on the Liberal-NCP ticket due to the inclusion of former House of Representatives MP David Hamer.
Tehan died in 1996, aged 80.