Thomas Alfred Thompson (August 5, 1868 – May 12, 1953) was a farmer and political figure in Ontario, Canada.
He represented Lanark North in the Legislative Assembly of Ontario from 1923 to 1929 and Lanark in the House of Commons of Canada from 1930 to 1940 as a Conservative member.
He was born in Ramsay Township, Ontario, the son of George Thompson.
He also was a public school trustee and was township clerk and treasurer for 20 years.
Thompson ran unsuccessful for a federal seat in 1929.