The 1921 Canadian federal election was held on December 6, 1921, to elect members of the House of Commons of Canada of the 14th Parliament of Canada. The Union government that had governed Canada through the First World War was defeated, and replaced by a Liberal government under the young leader William Lyon Mackenzie King. A new third party, the Progressive Party, won the second most seats in the election.

The 14th Canadian Parliament was in session from 8 March 1922 until 5 September 1925. The membership was set by the 1921 federal election on 6 December 1921, and it changed only somewhat due to resignations and by-elections until, due to momentary confusion among the MPs, it lost a money vote and was dissolved, causing the 1925 election.