Thomas George De Largie "Tom" d'Alton (8 December 1895 – 7 May 1968) was an Australian politician and diplomat. He was born in Warracknabeal in Victoria. In 1931 d'Alton was elected to the Tasmanian House of Assembly as a Labor member for Darwin; he was a minister from 1934 to 1943 and resigned from the House to become Australian High Commissioner to New Zealand. In 1946 he was the subject of a Royal Commission alleging corruption. He was elected to the Tasmanian Legislative Council, again representing Labor, for the seat of Gordon in 1947, serving until his death in Hobart in 1968.