James Bay in the context of "Albany River"

A bay is a recessed, coastal body of water that directly connects to a larger main body of water, such as an ocean, a lake, or another bay. A large bay is usually called a gulf, sea, sound, or bight. A cove is a small, circular bay with a narrow entrance. A fjord is an elongated bay formed by glacial action.The term embayment is also used for related features, such as extinct bays or freshwater environments.

A bay can be the estuary of a river, such as the Chesapeake Bay, an estuary of the Susquehanna River. Bays may also be nested within each other; for example, James Bay is an arm of Hudson Bay in northeastern Canada. Some bays are large enough to have varied marine geology, such as the Bay of Bengal (2,600,000 km or 1,000,000 sq mi) and Hudson Bay (1,230,000 km or 470,000 sq mi).

Ontario is the southernmost province of Canada. Located in Central Canada, Ontario is the country's most populous province. As of the 2021 Canadian census, it is home to 38.5% of the country's population, and is the second-largest province by total area (after Quebec). Ontario is Canada's fourth-largest jurisdiction in total area of all the Canadian provinces and territories. It is home to the nation's capital, Ottawa, and its most populous city, Toronto, which is Ontario's provincial capital.

Ontario is bordered by the province of Manitoba to the west, Hudson Bay and James Bay to the north, and Quebec to the east and northeast. To the south, it is bordered by the U.S. states of (from west to east) Minnesota, Michigan, Ohio, Pennsylvania (through Lake Erie), and New York. Almost all of Ontario's 2,700 km (1,700 mi) border with the United States follows rivers and lakes: from the westerly Lake of the Woods, eastward along the major rivers and lakes of the Great Lakes/Saint Lawrence River drainage system. There is only about 1 km (5⁄8 mi) of actual land border, made up of portages including Height of Land Portage on the Minnesota border.

Hudson Bay, sometimes called Hudson's Bay (usually historically), is a large body of saltwater in northeastern Canada with a surface area of 1,230,000 km (470,000 sq mi). It is located north of Ontario, west of Quebec, northeast of Manitoba, and southeast of Nunavut, but politically entirely part of Nunavut. It is an inland marginal sea of the Arctic Ocean. The Hudson Strait provides a connection to the Labrador Sea and the Atlantic Ocean in the northeast, while the Foxe Channel connects Hudson Bay with the Arctic Ocean in the north. The Hudson Bay drainage basin drains a very large area, about 3,861,400 km (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.

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.

Akimiski Island is the largest island in James Bay (a southeasterly extension of Hudson Bay), Canada, which is part of the Qikiqtaaluk Region of the territory of Nunavut. It has an area of 3,001 km (1,159 sq mi), making it the 163rd largest island in the world, and Canada's 29th largest island. Akimiski Island is 19 km (12 mi) from the province of Ontario. From the western side of the island, the Ontario coastline is visible.

The island's name is Swampy Cree for "land across the water".

Kashechewan First Nation, locally known as Kash, is a Cree First Nation located on the northern shore of the Albany River in Northern Ontario, Canada, within territory covered by Treaty 9. The community is located on the west coast of James Bay. Kashechewan came into being when most of the Anglican families of Fort Albany on the south shore of the river moved north in 1958–1961. Kashechewan was granted its own band council under the Indian Act in 1977, though the two still share a reserve, Fort Albany 67. The population was estimated to be about 2,000 as of 2024, according to the CBC, and as of October 2024, the total population of Kashechewan and Fort Albany, which are reported together by CIRNAC, was 5,597.

The First Nation was the subject of international media attention due to the discovery of E. coli in the community's water in October 2005, which brought popular consciousness to the health, housing, and economic crises facing the community.

East Cree, also known as James Bay (Eastern) Cree, and East Main Cree, is a group of Cree dialects spoken in Quebec, Canada on the east coast of lower Hudson Bay and James Bay, and inland southeastward from James Bay. Cree is one of the most spoken non-official aboriginal languages of Canada. Four dialects have been tentatively identified including the Southern Inland dialect (Iyiniw-Ayamiwin) spoken in Mistissini, Oujé-Bougoumou, Waswanipi, and Nemaska; the Southern Coastal dialect (Iyiyiw-Ayamiwin) spoken in Nemaska, Waskaganish, and Eastmain; the Northern Coastal Dialects (Iyiyiw-Ayimiwin), one spoken in Wemindji and Chisasibi and the other spoken in Whapmagoostui. The dialects are mutually intelligible, though difficulty arises as the distance between communities increases.

East Cree is not considered an endangered language thanks to the large population of younger people who speak it (Mela S.; Mali A. 2009). There are estimated to be more than 18,000 first-language speakers.