By-elections to the 20th Canadian Parliament were held to fill vacancies in the Canadian House of Commons between the 1945 federal election and the 1949 federal election. The Liberal Party of Canada led a working majority government for the 20th Canadian Parliament, though was technically a minority government during World War II.
Eighteen vacant seats were filled through by-elections.
References
By-elections to the 20th Canadian Parliament Wikipedia(Text) CC BY-SA