Lake Winnipeg is a large, 24,514-square-kilometre (9,465 sq mi) lake in central North America, in the province of Manitoba, Canada, with its southern tip about 55 kilometres (34 mi) north of the city of Winnipeg. It is the largest lake within the borders of southern Canada, and it is part of the most undeveloped large watershed of southern Canada.

Lake Winnipeg is the sixth-largest freshwater lake in Canada, but it is relatively shallow (mean depth of 12 m (39 ft)) excluding a narrow 36 m (118 ft) deep channel between the northern and southern basins. It is the eleventh-largest freshwater lake on Earth. The east side of the lake has pristine boreal forests and rivers that are being promoted as a potential United Nations World Heritage Park. The lake is elongated in shape and is 416 km (258 mi) from north to south, with remote sandy beaches, large limestone cliffs, and many bat caves in some areas. Manitoba Hydro uses the lake as one of the largest reservoirs in the world. There are many islands in the lake, most of them undeveloped.

Winnipeg ⁱ/ˈwɪnɪpɛɡ/ is the capital and largest city of Manitoba, Canada, and is the primary municipality of the Winnipeg Capital Region, with more than half of Manitoba's population. It is located near the longitudinal centre of North America, at the confluence of the Red and Assiniboine Rivers (a point commonly known as The Forks).

The name "Winnipeg" comes from the Cree for "muddy waters". The Winnipeg area was a trading centre for Aboriginal peoples prior to the arrival of Europeans. The first fort was built there in 1738 by French traders. A settlement was later founded by the Selkirk settlers in 1812, the nucleus of which was incorporated as the City of Winnipeg in 1873 with a population of 1,869. Winnipeg is the seventh-largest municipality in Canada, with a population of 663,617 in the Canada 2011 Census.

Winnipeg has a diversified economy, with sectors in finance, manufacturing, food and beverage production, culture, retail and tourism. Winnipeg is a major transportation hub, served by Richardson International Airport. The city has railway connections to the United States and Eastern and Western Canada through three Class I rail carriers.