Hudson Bay (Inuktitut: ᑲᖏᖅᓱᐊᓗᒃ ᐃᓗᐊ, romanized: Kangiqsualuk ilua or Inuktitut: ᑕᓯᐅᔭᕐᔪᐊᖅ, romanized: Tasiujarjuaq; French: baie d'Hudson), sometimes called Hudson's Bay (usually historically), is a large body of saltwater in northeastern Canada with a surface area of 1,230,000 km2 (470,000 sq mi). It is located north of Ontario, west of Quebec, north east of Manitoba and southeast of Nunavut, but politically entirely part of Nunavut. Although not geographically apparent, it is for climatic reasons considered to be a marginal sea of the Arctic Ocean. It drains a very large area, about 3,861,400 km2 (1,490,900 sq mi), that includes parts of southeastern Nunavut, Alberta, Saskatchewan, Ontario, Quebec, all of Manitoba, and parts of the U.S. states of North Dakota, South Dakota, Minnesota, and Montana. Hudson Bay's southern arm is called James Bay.
|Ocean/sea sources||Arctic Ocean, North Atlantic Ocean|
|Catchment area||3,861,400 km2 (1,490,900 sq mi)|
|Basin countries||Canada and the United States|
|Max. length||1,370 km (850 mi)|
|Max. width||1,050 km (650 mi)|
|Surface area||1,230,000 km2 (470,000 sq mi)|
|Average depth||100 m (330 ft)|
|Max. depth||270 m (890 ft)|
|Frozen||mid-December to mid-June|
|Islands||Islands of Hudson Bay|
|Settlements||Rankin Inlet, Arviat, Puvirnituq, Churchill|
The Eastern Cree name for Hudson and James Bay is Wînipekw (Southern dialect) or Wînipâkw (Northern dialect), meaning muddy or brackish water. Lake Winnipeg is similarly named by the local Cree, as is the location for the city of Winnipeg.