Largest lakes & reservoirs in Pennsylvania 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 40 articles we have published for Pennsylvania lakes.
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Below are lakes within USA > US Mid-Atlantic Region > Pennsylvania > Compared by surface area in acres. This list does not represent all lakes in Pennsylvania, only the 40 Pennsylvania lake articles we have published on the LakeLubbers website.
Lake name  |
Surface area in acres |
Lake description |
|---|---|---|
| Cowanesque Lake, PA (Pennsylvania, Pennsylvania Wilds Region, US Mid-Atlantic Region, USA) |
1,090 ac | Peacefully nestled between forested ridges in north central Pennsylvania lies Cowanesque Lake. Located near the New York state line, the name Cowanesq… |
| Beltzville Lake, PA (Northeastern Mountains Region, PA, Pennsylvania, US Mid-Atlantic Region, USA) |
949 ac | Also known as Beltzville Reservoir The Pennsylvania Pocono Mountains are spectacular for many reasons, and Beltzville Lake is one of them. Located in the southern foothills of these fam… |
| Conneaut Lake, PA (Great Lakes Region, PA, Pennsylvania, US Mid-Atlantic Region, USA) |
947 ac | Conneaut Lake, located in northwestern Pennsylvania, is the largest natural lake in Pennsylvania. Formed by receding glaciers, Conneaut Lake is what r… |
| Harveys Lake, PA (Northeastern Mountains Region, PA, Pennsylvania, US Mid-Atlantic Region, USA) |
658 ac | Also known as Harvey's Lake With a surface area of 658 acres, Harveys Lake is Pennsylvania’s largest natural lake by total volume of water. Located in the Northeastern Mountain R… |
| Pocono Lake, PA (Northeastern Mountains Region, PA, Pennsylvania, US Mid-Atlantic Region, USA) |
526 ac | The majestic Pocono Mountains set the backdrop for the lake that shares its name, Pocono Lake. The manmade Pocono Lake is located in the Northeastern… |
| Indian Lake, PA (Pennsylvania, Pittsburgh & Countryside Region, PA, US Mid-Atlantic Region, USA) |
499 ac | Indian Lake is a freshwater man-made lake shaped like a horseshoe, located in Somerset County, Pennsylvania. It is part of the state’s Laurel Highland… |
| Beaverdam Reservoir (Allegheny Mountains & Valleys Region, PA, Pennsylvania, US Mid-Atlantic Region, USA) |
382 ac | Also known as Beaverdam Run Reservoir Tucked away in rural Cambria County, in Pennsylvania’s Allegheny Mountains and Valleys region, Beaverdam Reservoir provides a welcome natural respite… |
| Treasure Lake (Pennsylvania, Pennsylvania Wilds Region, US Mid-Atlantic Region, USA) |
379 ac | Also known as Lake Rene The Pennsylvania Wilds Region is not a place you would expect to find a lake called Treasure Lake. Neither would you expect Bimini Lake or Trinidad Be… |
| Pinchot Lake (Pennsylvania, Pennsylvania Dutch Country Region, US Mid-Atlantic Region, USA) |
340 ac | Also known as Pinchot Reservoir, Gifford Pinchot State Park, Old Conewago Lake Only 20 miles south of Harrisburg, in Pennsylvania Dutch Country, 340-acre Pinchot Lake forms a recreational oasis. The reservoir was built in 1959 to… |
| Twin Lakes, PA (Northeastern Mountains Region, PA, Pennsylvania, US Mid-Atlantic Region, USA) |
340 ac | Nestled on the edge of the Poconos, the Twin Lakes are pristine glacial lakes tucked away in the land that inspired the birth of the US Forest Service… |
| Arrowhead Lake, PA (Northeastern Mountains Region, PA, Pennsylvania, US Mid-Atlantic Region, USA) |
328 ac | Tucked away in the beautiful Pocono Mountains, Arrowhead Lake is a private gated community in the Northeastern Mountains region of Pennsylvania. Loads… |
| Lake Ariel, PA (Northeastern Mountains Region, PA, Pennsylvania, US Mid-Atlantic Region, USA) |
325 ac | For over 150 years people have been making their way to the Pocono Mountains of northeastern Pennsylvania to enjoy the beautiful waters of Lake Ariel.… |
