Thomas James Irwin (21 June 1889 – 15 May 1962) was a Canadian politician serving in the Legislative Assembly of British Columbia and the House of Commons of Canada. Irwin was born in Dumbarton, Scotland and became a farmer by trade. He was elected to the BC legislature in the 1952 provincial election at the Delta electoral district as a provincial Social Credit candidate. He was re-elected there for two more terms following the 1953 and 1956 provincial elections. From 1953 to 1957, he served as Speaker of the Assembly.