Lake Simcoe
Lake Simcoe is a lake
A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...

 in Southern
Southern Ontario
Southern Ontario is a region of the province of Ontario, Canada that lies south of the French River and Algonquin Park. Depending on the inclusion of the Parry Sound and Muskoka districts, its surface area would cover between 14 to 15% of the province. It is the southernmost region of...

Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....

, Canada
Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

, the fourth-largest lake wholly in the province, after Lake Nipigon
Lake Nipigon
Lake Nipigon is the largest lake entirely within the boundaries of the Canadian province of Ontario . It is sometimes described as the sixth Great Lake. Lying 260 metres above sea level, the lake drains into the Nipigon River and thence into Nipigon Bay of Lake Superior...

, Lac Seul
Lac Seul
Lac Seul is a large, crescent shaped lake in northwestern Ontario, Canada. It is approximately long. It has a maximum depth of 47.2 m, with a surface elevation of 357 m above sea level. It is the second largest body of water entirely within the province of Ontario. The lake consists of open...

, and Lake Nipissing
Lake Nipissing
Lake Nipissing is a lake in the Canadian province of Ontario. It has a surface area of , a mean elevation of above sea level, and is located between the Ottawa River and Georgian Bay. Excluding the Great Lakes, Lake Nipissing is the fifth-largest lake in Ontario. It is relatively shallow for a...

. At the time of the first European contact in the 17th century the lake was called Ouentironk ("Beautiful Water") by the Huron natives. It was also known as Lake Toronto until it was renamed by John Graves Simcoe
John Graves Simcoe
John Graves Simcoe was a British army officer and the first Lieutenant Governor of Upper Canada from 1791–1796. Then frontier, this was modern-day southern Ontario and the watersheds of Georgian Bay and Lake Superior...

, the first Lieutenant-Governor of Upper Canada, in memory of his father.

The lake is bordered by Simcoe County
Simcoe County, Ontario
Simcoe County is located in central portion of Southern Ontario. The County is situated just north of the Greater Toronto Area stretching from the shores of Lake Simcoe in the east to Georgian Bay in the west...

, Durham Region, and York Region.