The Boatswain Bay Migratory Bird Sanctuary (variant: Baie Boatswain Migratory Bird Sanctuary) is a migratory bird sanctuary that extends between Nunavut and Quebec, Canada. It is located in Boatswain Bay an arm of James Bay, and the Quebec headland. It was established on 29 January 1941 and consists of 17,900 hectares It was established in 1941. It is classified Category IV by the International Union for Conservation of Nature.