Largest lakes & reservoirs in Connecticut by water volume
The estimated volume of water that a lake contains is measured at the lake’s normal elevation. By this measure, the world’s largest freshwater lake is Siberia’s Lake Baikal.Water Volume can be measured in acre-feet, in cubic miles, or in cubic kilometers. One acre-foot is the amount of water needed to cover one acre (43,560 square feet) to a depth of one foot. One cubic mile equals 3,379,200 acre-feet. One cubic kilometer equals 810,713 acre-feet. 1 acre-foot is equal to 325,851 US gallons. Siberia’s Lake Baikal contains about 6,276,367,740,000,000 gallons of freshwater – nearly 1 million gallons for every living person on earth.
The other – and more widely used – measure of a lake’s size is the lake’s surface acreage. By that measure, the world’s largest freshwater lake is North America’s Lake Superior.
Note: In the United States, an acre foot is a unit of volume used to refer to large-scale bodies of water. It is defined by the volume of water needed to cover 1 acre of surface area to a depth of 1 foot.
You can find many of the the world’s largest lakes (by water volume) on LakeLubbers. Note: For some lakes, the water volume data is unknown or does not apply, so you may see fewer lakes than the total 30 articles we have published for Connecticut lakes.
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Below are lakes within USA > US New England Region > Connecticut > Compared by water volume. This list does not represent all lakes in Connecticut, only the 30 Connecticut lake articles we have published on the LakeLubbers website.
Lake name  |
Water vol. in ac-ft |
Lake description |
|---|---|---|
| Candlewood Lake, CT (Connecticut, Litchfield Hills Region, CT, US New England Region, USA) |
167,112 ac-ft | Candlewood Lake is Connecticut’s largest man-made reservoir. The City of Danbury and four other towns (Brookfield, New Milford, Sherman and New Fairfi… |
| Lake Lillinonah, CT (Connecticut, Litchfield Hills Region, CT, US New England Region, USA) |
68,068 ac-ft | With more than 1500 acres of boating and fishing waters, bordered by a wide variety of shoreline vistas, Lake Lillinonah in southwestern Connecticut i… |
| Colebrook River Lake, CT/MA (Connecticut, Litchfield Hills Region, CT, Massachusetts, US New England Region, USA, Western Massachusetts) |
43,778 ac-ft | (Also known as Colebrook River Reservoir) With over 800 acres of boating and fishing waters, with no residential development, Colebrook River Lake – straddling the Connecticut and Massachusett… |
| Saugatuck Reservoir, CT (Connecticut, Litchfield Hills Region, CT, US New England Region, USA) |
37,215 ac-ft | Saugatuck Reservoir is an outdoor person’s wonderland with great fishing, wonderful hiking, a unique landscape and a plethora of woodland and marsh bi… |
| Lake Zoar, CT (Connecticut, Litchfield Hills Region, CT, US New England Region, USA) |
26,361 ac-ft | (Also known as Zoar Lake) With more than 900 acres of boating and fishing waters bordered by shoreline vistas, southwestern Connecticut’s Lake Zoar is a great outdoor destinati… |
| Lake Waramaug, CT (Connecticut, Litchfield Hills Region, CT, US New England Region, USA) |
16,400 ac-ft | Lake Waramaug is over four miles long, and in the Housatonic River Drainage Basin offering wonderful outdoor recreation and fine fishing for residents… |
| Bantam Lake, CT (Connecticut, Litchfield Hills Region, CT, US New England Region, USA) |
13,099 ac-ft | Bantam Lake is an outdoor wonderland with great fishing, an almost completely forested shoreline and White Memorial Foundation – a nationally known co… |
| Highland Lake, CT (Connecticut, Litchfield Hills Region, CT, US New England Region, USA) |
11,800 ac-ft | Highland Lake is a 444-acre lake nestled in the Berkshire Mountains of Litchfield County near the city of Winsted, Connecticut. Known as a resort lake… |
| Pachaug Pond, CT (Connecticut, Mystic Country Region, CT, US New England Region, USA) |
5,551 ac-ft | Pachaug Pond is nestled in the town of Griswold, in southeastern Connecticut and is the state’s largest public water body east of the Connecticut Rive… |
| Beach Pond, CT/RI (Connecticut, Mystic Country Region, CT, Rhode Island, US New England Region, USA, Washington County, RI) |
4,100 ac-ft | Beach Pond’s 459 acres span the south-central Rhode Island-Connecticut state line near the communities of Exeter and Voluntown — the wooded shoreline… |
| Winchester Lake, CT (Connecticut, Litchfield Hills Region, CT, US New England Region, USA) |
3,120 ac-ft | Winchester Lake is nestled in the heart of northwestern Connecticut’s elegant Litchfield County. At 229 acres, the inviting water offers visitors and… |
| Quaddick Lake (Connecticut, Mystic Country Region, CT, US New England Region, USA) |
2,988 ac-ft | (Also known as Quaddick Reservoir) Northeast Connecticut is home to Quaddick Lake. This reservoir in Connecticut’s Mystic Country was created by damming the flow of Five Mile River to d… |