Ewen Daniel "Dan" Mackinnon (11 February 1903 – 7 June 1983) was an Australian politician. The son of state MLA Donald Mackinnon, he was born in Melbourne and educated at Geelong Grammar School and then attended Oxford University. He returned to Australia as a grazier at Linton before becoming a company director and serving in the military 1938-43. In 1949, he was elected to the Australian House of Representatives as the Liberal for Wannon, but he was defeated in 1951.