Bellechasse (French pronunciation: [bɛlʃas]) was a federal electoral district in Quebec, Canada.

In 1882, the north-eastern part of the Township of Armagh in the County of Bellechasse, and the north-east part of the township of Mailloux were detached from Bellechasse and annexed to Montmagny.

In 1924, Bellechasse was re-defined to consist of the County of Bellechasse, except for the seigneuries of Lauzon and Joliette in the municipality of Honfleur, and the townships of Langevin and Ware in the municipality of Sainte-Sabine.

In 1976, Bellechasse was re-defined to consist of the City of Montmagny, the Towns of Lac-Etchemin, L'Islet and Saint-Pamphile, the County of Montmagny, the County of L'Islet (except the parish municipality of Sainte-Louise and the municipality of Saint-Roch-des-Aulnets), parts of the Counties of Bellechasse and Dorchester.

This riding elected the following members of Parliament: Casault appointed Puisne Judge of the Superior Court of Quebec Fournier nominated Minister of Inland Revenue Fournier appointed to the Supreme Court Bench Election declared void Picard's resignation