Hudson Bay (Inuktitut: Kangiqsualuk ilua, ), sometimes (usually historically) called Hudson's Bay, is a large body of saltwater in northeastern Canada, with a surface area of . It drains a very large area, about , that includes parts of Ontario, Quebec, Saskatchewan, Alberta, most of Manitoba, southeastern Nunavut, as well as parts of North Dakota, South Dakota, Minnesota, and Montana. The southern arm of Hudson Bay is called James Bay.