Thomas Hyland Smeaton (15 July 1857 – 17 October 1927) was an Australian politician and trade unionist. He was a member of the South Australian House of Assembly from 1905 to 1921, representing the electorates of Torrens (1905–1915) and Sturt (1915–1921). He was a member of the Labor Party until being expelled in the 1917 Labor split over conscription, and represented the splinter National Party until he left parliament.