Largest lakes & reservoirs in Ohio 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 25 articles we have published for Ohio lakes.
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Below are lakes within USA > US Midwest Region > Ohio > Compared by water volume. This list does not represent all lakes in Ohio, only the 25 Ohio lake articles we have published on the LakeLubbers website.
Lake name  |
Water vol. in ac-ft |
Lake description |
|---|---|---|
| Lake Erie (Canada, Chautauqua-Allegheny Region, NY, Great Lakes Region, PA, Great Lakes of North America, Greater Niagara Region, NY, Michigan, New York, Northeast Ohio, Northwest Ohio, Ohio, Ontario, Canada, Pennsylvania, Southeast Michigan, US Mid-Atlantic Region, US Midwest Region, USA) |
391,987,200 ac-ft | Lake Erie, one of the Great Lakes of North America, straddles the borders of Ohio, Pennsylvania, New York, Michigan, and the Canadian province of Onta… |
| Pymatuning Lake, PA/OH (Great Lakes Region, PA, Northeast Ohio, Ohio, Pennsylvania, US Mid-Atlantic Region, US Midwest Region, USA) |
188,000 ac-ft | (Also known as Pymatuning Reservoir) Pymatuning Lake, located in northwestern Pennsylvania and spilling over into northeastern Ohio, is a lake of superlatives: Clocking in at 17,088 acres… |
| Mosquito Creek Lake, OH (Northeast Ohio, Ohio, US Midwest Region, USA) |
86,350 ac-ft | (Also known as Mosquito Creek Reservoir, Mosquito Lake) Mosquito Creek Lake is one of the highlights of Northeast Ohio. At 7850 acres, it is the second largest inland lake in the state. Also known as Mosqui… |
| West Branch Lake, OH (Northeast Ohio, Ohio, US Midwest Region, USA) |
52,900 ac-ft | (Also known as Michael J. Kirwan Reservoir) West Branch Lake is set in Northeast Ohio’s glaciated land, where large boulders of ice left marshy wetlands in their recession thousands of years ago… |
| Senecaville Lake, OH (Ohio, Southeast Ohio, US Midwest Region, USA) |
43,500 ac-ft | (Also known as Seneca Lake) Senecaville Lake, also known as Seneca Lake, is the third largest inland lake in Ohio with 3,550 acres. Senecaville Lake is conveniently located in so… |
| Salt Fork Lake, OH (Ohio, Southeast Ohio, US Midwest Region, USA) |
41,100 ac-ft | Salt Fork Lake is a 3,000-acre recreational gem nestled in the foothills of the Appalachian Mountains in Guernsey County in Ohio’s Southeast tourism r… |
| Tappan Lake (Northeast Ohio, Ohio, US Midwest Region, USA) |
35,100 ac-ft | (Also known as Tappan Reservoir) Tappan Lake is a 2,350-acre reservoir in Northeast Ohio, one of a series of lakes managed by the Muskingum Watershed Conservancy District. The U.S. Ar… |
| Shenango River Lake, PA/OH (Great Lakes Region, PA, Northeast Ohio, Ohio, Pennsylvania, US Mid-Atlantic Region, US Midwest Region, USA) |
29,920 ac-ft | (Also known as Shenango Reservoir) Located mostly in northwestern Pennsylvania between Greenville PA and Sharon PA – and spilling into northeastern Ohio – Shenango River Lake provides f… |
| Atwood Lake, OH (Northeast Ohio, Ohio, US Midwest Region, USA) |
23,600 ac-ft | Atwood Lake is nestled in the rolling farm landscapes of Ohio’s Northeast tourism region. The lake straddles the border of Carroll and Tuscarawas Coun… |
| Delaware Lake, OH (Central Ohio, Ohio, US Midwest Region, USA) |
14,000 ac-ft | (Also known as Lake Delaware) Delaware Lake is a central Ohio reservoir designed and constructed by the Huntington District of the U.S. Army Corps of Engineers. The Corps’ Ohio Riv… |
| Pleasant Hill Lake, OH (Northeast Ohio, Ohio, US Midwest Region, USA) |
13,500 ac-ft | (Also known as Pleasant Hill Reservoir) Crisp clean air, glistening blue water, and miles of picturesque nature describe the majestic beauty of Pleasant Hill Lake. Located near Perrysville,… |
| Acton Lake (Ohio, Southwest Ohio, US Midwest Region, USA) |
8,000 ac-ft | (Also known as Hueston Woods Lake) Acton Lake, In the Southwest region of Ohio, has provided recreation opportunities to generations of visitors in the 50 years since it was created. On… |