The 23rd Canadian Parliament was in session from October 14, 1957, until February 1, 1958.

The membership was set by the 1957 federal election on June 10, 1957, and it changed only somewhat due to resignations and by-elections until it was dissolved prior to the 1958 election.

It was controlled by a Progressive Conservative Party minority under Prime Minister John Diefenbaker and the 18th Canadian Ministry.

The Official Opposition was the Liberal Party, led first by Louis St. Laurent, and then by Lester B. Pearson.

Following is a full list of members of the twenty-third Parliament listed first by province or territory, then by electoral district.