Dorothy Thomas, née Mikos was a Canadian politician who served on the Toronto City Council from 1972 to 1976 and from 1980 to 1985. Thomas studied journalism at the University of Toronto and worked as an arts reporter at the Toronto Star before marrying film director Ralph Thomas. As a resident of The Beaches, she became an activist in the campaign against the Scarborough Expressway, and ran for municipal office in the 1972 election, defeating incumbent councillor Tom Wardle. She was one of several progressive reform candidates, including , , Colin Vaughan, Dan Heap, Karl Jaffary, Reid Scott, John Sewell and Anne Johnston, who were elected alongside mayor David Crombie.