Châteauguay—Huntingdon—Laprairie was a federal electoral district in Quebec, Canada, that was represented in the Canadian House of Commons from 1949 to 1968.
This riding was created in 1947 from parts of Beauharnois—Laprairie and Châteauguay—Huntingdon ridings.
It consisted of:
- the county of Châteauguay, except the municipality of St-Joachim-de-Châteauguay;
- the county of Huntingdon, (except the municipalities of St. Anicet and Ste. Barbe), and the town of Huntingdon;
- the county of Laprairie (except the municipality of St-Jacques-le-Mineur), and the town of Laprairie; and
- in the county of St. Jean, the municipalities of Notre-Dame-du-Mont-Carmel, St-Bernard-de-Lacolle and the village of Lacolle.
It was abolished in 1966 when it was redistributed into Beauharnois, Chambly, Laprairie and Saint-Jean ridings.
Members of Parliament
This riding elected the following Members of Parliament:
- Donald Elmer Black, Liberal (1949–1953)
- Jean Boucher, Liberal (1953–1958)
- Merrill Edwin Barrington, Progressive Conservative (1958–1962)
- Jean Boucher, Liberal (1962–1963)
- Ian Watson, Liberal (1963–1968)