Largest lakes & reservoirs in Ontario, Canada by acres
There is no widely-accepted minimum surface area that defines a lake. What LakeLubbers describes as a lake, you might call a pond. Acreage of a lake (or sometimes square kilometers) is most often measured at the top surface area when the lake is at normal elevation. The surface area can be considerably smaller or larger when lake levels are lower or higher than normal. North America’s Lake Superior is the world’s largest freshwater lake by this measure.The other measure of a lake’s size is the lake’s water volume. By that measure, the world’s largest freshwater lake is Lake Baikal in Siberia.
You can find many of the world’s largest lakes (acres) on LakeLubbers in the comparison table below. Note: For some lakes, "Largest Lakes - Acres" data is unknown or does not apply, so you may see fewer lakes than the total 55 articles we have published for Ontario, Canada lakes.
Thinking about booking a Ontario, Canada lake vacation home rental, cabin or hotel?
Use our free interactive vacation rental map to search and compare multiple vacation properties at a glance. Enter a lake name, a state or city and then simply click on a listing to compare all similar properties, best rates and availability for your dates.Search results: Sort lakes by surface acreage
Below are lakes within Canada > Ontario, Canada > Compared by surface area in acres. This list does not represent all lakes in Ontario, Canada, only the 55 Ontario, Canada lake articles we have published on the LakeLubbers website.
Lake name | Surface area in acres | Lake description |
---|---|---|
Buckhorn Lake, ON (Canada, Ontario, Canada) |
7,880 ac | Also known as Trent-Severn Waterway, Kawartha Lakes Part of the Kawartha Chain of Lakes, Buckhorn Lake is one of the many lakes that make up the famed Trent-Severn Waterway. The waterway connects Lake O … |
Bobs and Crow Lakes (Canada, Ontario, Canada) |
7,776 ac | A perfect destination to savor the character of the Rideau Lake District is Bobs and Crow Lakes. Located 50 miles north of Kingston, Ontario, the two … |
Round Lake, ON (Canada, Ontario, Canada) |
7,596 ac | Round Lake is a spectacular 7,596-acre lake located in Renfrew County, Ontario, Canada. Renfrew County is part of the Ottawa Valley which was carved b … |
Chemong Lake (Canada, Ontario, Canada) |
5,634 ac | Also known as Lake Chemong, Lake Chemung Chemong Lake is the largest lake in the Kawartha Chain of Lakes, covering more than 5,630 acres. This lake holds historical significance for the resid … |
Charleston Lake (Canada, Ontario, Canada) |
5,359 ac | A natural haven awaits vacationers in Eastern Ontario along the shores of Charleston Lake. Balanced along the eastern edge of the Frontenac Arch geolo … |
Newboro Lake (Canada, Ontario, Canada) |
4,562 ac | Also known as Mud Lake, Rideau Lakes Newboro Lake, in Ontario’s Rideau Lakes Region is synonymous with water fun. The 4500-acre lake is home to cottages and fishing camps, islands large a … |
Trout Lake ON (Canada, Ontario, Canada) |
4,136 ac | Located in Ontario’s Nipissing District, Trout Lake has everything to offer the northwoods adventurer looking for water-based activities. Often oversh … |
Mazinaw Lake (Canada, Ontario, Canada) |
3,929 ac | Also known as Upper Mazinaw Lake, Lower Mazinaw Lake Amazing Mazinaw Lake holds court as the headwaters of Canada’s Mississippi River in eastern Ontario. This beautiful sprawling lake has alternately del … |
Kennisis Lake (Canada, Ontario, Canada) |
3,502 ac | A true jewel in the crown of Ontario’s Cottage Country, 3500-acre Kennisis Lake has been the prefect vacation getaway for generations of Canadian cott … |
Upper Rideau Lake (Canada, Ontario, Canada) |
3,366 ac | Also known as Rideau Lakes Upper Rideau Lake holds a prominent place in Ontario’s ‘other Cottage Country’. Although many think of the area around Lake Muskoka as Eastern Canada’ … |
Calabogie Lake, ON (Canada, Ontario, Canada) |
3,362 ac | About 10,000 years ago a glacier retreated across what would become Ontario, leaving over a quarter of a million lakes in its wake. The ice-scour lake … |
Haliburton Lake (Canada, Ontario, Canada) |
2,502 ac | Haliburton Lake is located in Ontario, Canada in a region called the Haliburton Highlands. The name was given due to the beautiful scenery that resemb … |