Beauharnois (also known as Beauharnois—Salaberry) was a federal electoral district in Quebec, Canada, that was represented in the Canadian House of Commons from 1867 to 1935, from 1949 to 1953, and from 1968 to 1972.

Beauharnois is a provincial electoral district in Quebec, Canada that elects members to the National Assembly of Quebec. The riding was created in 2003 from parts of Beauharnois-Huntingdon, Châteauguay and Salaberry-Soulanges.