Largest lakes & reservoirs in Thousand Islands Region, NY 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 7 articles we have published for Thousand Islands Region, NY lakes.
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Below are lakes within USA > US Mid-Atlantic Region > New York > Thousand Islands Region, NY > Compared by surface area in acres. This list does not represent all lakes in Thousand Islands Region, NY, only the 7 Thousand Islands Region, NY lake articles we have published on the LakeLubbers website.
Lake name  |
Surface area in acres |
Lake description |
|---|---|---|
| Lake Ontario (Canada, Finger Lakes Region, NY, Great Lakes of North America, Greater Niagara Region, NY, New York, Ontario, Canada, Thousand Islands Region, NY, US Mid-Atlantic Region, USA) |
4,697,600 ac | Lake Ontario, one of the world’s five Great Lakes, weaves over state and country borders, delighting Americans, Canadians, and visiting tourists with … |
| Lake St. Francis, NY / Canada (Canada, New York, Ontario, Canada, Quebec, Canada, Thousand Islands Region, NY, US Mid-Atlantic Region, USA) |
67,213 ac | Also known as Lac Saint-Francois Lake St. Francis is part of the 2,340 mile system of locks, canals, and channels that link the Atlantic Ocean to the Great Lakes and the St. Lawrence … |
| Oneida Lake, NY (Central-Leatherstocking Region, NY, Finger Lakes Region, NY, New York, Thousand Islands Region, NY, US Mid-Atlantic Region, USA) |
51,072 ac | Covering more than 51,000 acres, Oneida Lake is the largest lake located entirely within the state of New York. Named after the Iroquois Nation Oneida … |
| Black Lake NY (New York, Thousand Islands Region, NY, US Mid-Atlantic Region, USA) |
7,761 ac | Known as the best fishing destination in the 1000 Islands Region of upstate New York, Black Lake has been drawing anglers and vacationers to its shore … |
| Sylvia Lake (Adirondacks Region, NY, New York, Thousand Islands Region, NY, US Mid-Atlantic Region, USA) |
324 ac | Also known as Lake Killarney (historical) Tucked neatly away on the border between New York’s Adirondack and Thousand Islands regions, Sylvia Lake is the perfect Northern New York location for … |
| Crystal Lake, NY (New York, Thousand Islands Region, NY, US Mid-Atlantic Region, USA) |
169 ac | Also known as Sixtown Pond, Little Stony Creek Pond Nestled in quiet corner of Jefferson County, New York is a peaceful lake known by three names: Crystal Lake, Little Stony Creek Pond, and Sixtown Pond … |
| Autumn Lake (New York, Thousand Islands Region, NY, US Mid-Atlantic Region, USA) |
8 ac | Autumn Lake is a beautiful 8-acre private lake in Orwell, New York, just a few miles east of Pulaski in Oswego County. The secluded lake offers a peac … |