The Seventeenth Canadian Ministry was the cabinet chaired by Prime Minister Louis St-Laurent. It governed Canada from 15 November 1948 to 21 June 1957, including the end of the 20th Canadian Parliament, as well as all of the 21st and 22nd. The government was formed by the Liberal Party of Canada.

The 20th Canadian Parliament was in session from 6 September 1945, until 30 April 1949. The membership was set by the 1945 federal election on 11 June 1945, and it changed only somewhat due to resignations and by-elections until it was dissolved prior to the 1949 election.