Châteauguay-Laprairie
| Quebec electoral district | |
|---|---|
| Defunct provincial electoral district | |
| Legislature | National Assembly of Quebec | 
| District created | 1939 | 
| District abolished | 1944 | 
| First contested | 1939 | 
| Last contested | 1939 | 
Châteauguay-Laprairie was a former provincial electoral district in the province of Quebec, Canada.
Many sources (including the National Assembly website) write it as Châteauguay-La Prairie, but contemporary sources show the "Laprairie" part of the name written as one word. This alternate way of spelling it is probably by analogy with the modern-day La Prairie electoral district, which was spelled "Laprairie" before 1988.
It was created for the 1939 election, from parts of the Châteauguay and Napierville-Laprairie electoral districts. It existed for only that one election. It disappeared in the 1944 election and its successor electoral district was the recreated Châteauguay.