Keith Walter Wilson Ewert (12 April 1918 – 2 December 1989) was an Australian politician. Educated at Melbourne High School and the University of Melbourne, he was an accountant before entering politics. In 1952, Ewert was elected to the Australian House of Representatives as the Labor member for Flinders, unexpectedly winning the by-election for that seat caused by the death of Rupert Ryan and becoming only the second Labor MP for Flinders. In 1954, he was defeated by Liberal Robert Lindsay.