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Here are the 47 lakes we have listed within Canada > Ontario - compared by Deepest Lakes.

Note: For some lakes, "Deepest Lakes" is unknown or does not apply, so this comparison may show fewer lakes than you originally selected. Suggest a new lake.

Lake Name Maximum depth in feet Lake Description
Lake Superior
(Ontario, Canada / Great Lakes / Michigan, USA / Minnesota, USA / Wisconsin, USA)
1,332 Lake Superior Pictures Skipping over state and country borders, Lake Superior, the largest, deepest, coldest, cleanest, least developed, and most pristine of the Great Lakes, reigns as the largest freshwater lake in the world by surface area. By volume, this 31,820 square mile colossus ranks fourth - a whopping 2,900 cubic ...
Lake Michigan-Huron
(Ontario, Canada / Great Lakes / Illinois, USA / Indiana, USA / Michigan, USA / Wisconsin, USA)
923 Lake Michigan-Huron Pictures Lake Michigan and Lake Huron - two of North America's Great Lakes - are contiguous and they share the same elevation of 577 feet above sea level. They are connected by the five-mile-wide Straits of Mackinac. Hydrologically, this makes these "two lakes" a single lake. Some hydrologists designate the ...
Lake Ontario
(Ontario, Canada / Great Lakes / New York, USA)
802 Lake Ontario Pictures Lake Ontario, one of the world's five Great Lakes, weaves over state and country borders, delighting Americans, Canadians, and visiting tourists with its deep, clear, clean waters. Proudly home to a staggering 4,700,000 acres (7,340 square miles), Lake Ontario is the smallest of the Great Lakes, the ...
Lake Huron
(Ontario, Canada / Great Lakes / Michigan, USA)
750 Lake Huron Pictures A glacial lake of epic proportions, Lake Huron is the second largest of the five Great Lakes by surface area, boasting 23,010 square miles and an incredible 3,825-mile shoreline. The massive lake is the third largest of the Great Lakes by water volume, containing 850 cubic miles of fresh water within ...
Lake Timiskaming
(Ontario, Canada / Quebec, Canada)
709 Lake Timiskaming Pictures Also known as: Lake Temiskaming, Lac Temiscamingue
Large, scenic and inviting, Lake Timiskaming forms part of the border between Ontario and Quebec. A full 68 miles long, Lake Timiskaming is about 5 miles wide at its widest point. However, that width is deceptive; the lake formed in a rift valley and is more than 700 feet deep in spots. The lake lies ...
Lake Nipigon
(Ontario, Canada)
540 Lake Nipigon Pictures Located in Ontario Canada's Sunset Country, Lake Nipigon is a destination into a remote area of pristine wilderness and the largest lake entirely within the boundaries of Ontario. With towering cliffs, hundreds of islands to explore, and the unusual greenish-black sandy beaches, Lake Nipigon is outdoor ...
Mazinaw Lake
(Ontario, Canada)
476 Mazinaw Lake Pictures 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 delighted and intimidated those who ventured onto its waters for hundreds of years. First Nations tribes spoke in hushed terms of Mishipashoo, legendary ...
Big Rideau Lake
(Ontario, Canada)
328 Big Rideau Lake Pictures Also known as: Rideau Lakes
One of the largest lakes along the route of the Rideau Waterway in Ontario, Canada is Big Rideau Lake. This lake is controlled by a canal system called the Rideau Canal Waterway. With 45 locks at 23 stations along the canal, Rideau Waterway connects to more than eight lakes including Lower Rideau Lake, ...
Charleston Lake
(Ontario, Canada)
300 Charleston Lake Pictures A natural haven awaits vacationers in Eastern Ontario along the shores of Charleston Lake. Balanced along the eastern edge of the Frontenac Arch geological formation, Charleston Lake has been the place to go for swimming, boating and fishing for over a hundred years. Charleston Lake has seen visitors ...
Saganaga Lake
(Ontario, Canada / Minnesota, USA)
280 The 13,832 acres of Saganaga Lake straddle the border of Northeastern Minnesota and Ontario, Canada. Part of the well known Boundary Waters Canoe Area Wilderness (BWCAW), Saganaga Lake is also an outdoor playground. Camping, fishing, hiking, canoeing and many other recreational activities await all ...
Lake Nipissing
(Ontario, Canada)
226 Lake Nipissing Pictures Located in the Near North region of Ontario, Lake Nipissing is the fifth largest lake in Ontario excluding the Great Lakes. This relatively shallow 211,200-acre lake is situated between the Ottawa River and Georgian Bay. It drains into Georgian Bay via the French River and with an average depth of only ...
Trout Lake
(Ontario, Canada)
226 Trout Lake Pictures Located in Ontario's Nipissing District, Trout Lake has everything to offer the northwoods adventurer looking for water-based activities. Often overshadowed by its larger sister Lake Nipissing, Trout Lake offers all of the fishing, frolic and fun that the bigger lake does, just on a bit smaller and ...
Kennisis Lake
(Ontario, Canada)
223 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 cottagers. Located in the area popularly known as the Haliburton Highlands, Kennisis Lake is the largest lake in the region and a vital part of the Trent-Severn ...
Lake Muskoka
(Ontario, Canada)
220 Lake Muskoka Pictures Also known as: Muskoka Lake, Muskoka Lakes Region
Lake Muskoka, located in Ontario's Muskoka Lakes Region, is arguably Canada's most famous lake. Actually a chain of lakes, Muskoka joins Lake Joseph and Lake Rosseau, along with several smaller lakes, to make up what Canada calls "Cottage Country." The huge chain of rocky-shored lakes contains many ...
Lake Erie
(Ontario, Canada / Great Lakes / New York, USA / Pennsylvania, USA / Michigan, USA / Ohio, USA)
210 Lake Erie Pictures Lake Erie, one of the Great Lakes of North America, straddles the borders of Ohio, Pennsylvania, New York, Michigan, and the Canadian province of Ontario. The lake is named after the Native American tribe that inhabited its shores before being killed off by the Iroquois League for aiding their enemy, ...
Lake of the Woods
(Manitoba, Canada / Ontario, Canada / Minnesota, USA)
210 Lake of the Woods Pictures Spanning the border from Minnesota into the Canadian provinces of Ontario and Manitoba, Lake of the Woods is an enormous body of water over 68 miles long, 59 miles wide, with 25,000 miles of shoreline - the world's longest lake shoreline. The western part of the lake is mostly open water, while the ...
Haliburton Lake
(Ontario, Canada)
180 Haliburton Lake Pictures Haliburton Lake is located in Ontario, Canada in a region called the Haliburton Highlands. The name was given due to the beautiful scenery that resembles the Scottish Highlands and the Scottish ancestry of the founding population. Haliburton Lake is named after Thomas Chandler Haliburton, a man originally ...
Round Lake
(Ontario, Canada)
180 Round Lake Pictures 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 by glaciers some 600 million years ago. Today, Renfrew County sits in the midst of stunning wilderness and gorgeous landscapes. Two provincial parks on ...
Rainy Lake
(Ontario, Canada / Minnesota, USA)
161 Rainy Lake Pictures Rainy Lake's sprawling 221,000 acres straddle the border of United States and Canada. Known as a water sports lover's paradise, Rainy Lake is located in the Northeastern Region of Minnesota near International Falls and Ranier. Canada's portion of Rainy Lake consists of 75% of this massive body of ...
Lac des Chats
(Ontario, Canada / Quebec, Canada)
157 Lac des Chats Pictures Also known as: Chats Lake
Lac des Chats is more than a 'wide spot' on the Ottawa River. Champlain and other explorers remarked on the abundance of catfish along the waterway, so the lake became known as Lac des Chats, or Lake of the Cats. The lake was located above Chats Falls, and for many years the falls drew visitors to view ...
Lac Seul
(Ontario, Canada)
155 Lac Seul Pictures Also known as: Lake Seul
The second-largest lake entirely within Ontario, Lac Seul has somehow escaped the notice of the casual vacationer looking for a northwoods getaway. That hardly means, however, that no one visits Lac Seul. Well over a dozen tourist camps, fishing lodges and outfitters do a booming business providing ...
Otter Lake
(Ontario, Canada)
147 Otter Lake Pictures Also known as: Big Otter Lake
Otter Lake is a sparkling 1,252-acre lake located near Parry Sound, Ontario, in the Georgian Bay region known as The 30,000 Islands. The Georgian Bay is 200 miles long by 50 miles wide and covers over 5,800 square miles making it almost as large as Lake Ontario. Local legend tells of a god called Kitchikewana, ...
Little Kennisis Lake
(Ontario, Canada)
144 Little Kennisis Lake is the smaller counterpart to Kennisis Lake, which is one of the largest lakes in the Haliburton Highlands of Ontario, Canada. Little Kennisis Lake is a relatively secluded lake for those who enjoy their privacy, but it also offers activities just minutes away at the more populated ...
Lake Simcoe
(Ontario, Canada)
130 Lake Simcoe Pictures Spectacular Lake Simcoe is one of the most visited vacation spots in Ontario's south-central region. Just over an hour north of Toronto, Lake Simcoe provides 287 square miles of water surface and 118 miles of shoreline, guaranteeing plenty of space for every type of water-based amusement visitors could ...
Maple Lake
(Ontario, Canada)
120 Maple Lake is a lovely natural freshwater lake tucked away in the Haliburton Highlands of Ontario. This lake has 829 acres of calming blue waters. The Haliburton Highlands region is named in honor of Thomas Chandler Haliburton and for its resemblance to the Scottish Highlands. The lake is a popular ...

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