Largest lakes & reservoirs in New Jersey 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 21 articles we have published for New Jersey lakes.
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Below are lakes within USA > US Mid-Atlantic Region > New Jersey > Compared by surface area in acres. This list does not represent all lakes in New Jersey, only the 21 New Jersey lake articles we have published on the LakeLubbers website.
Lake name  |
Surface area in acres |
Lake description |
|---|---|---|
| Lake Hopatcong, NJ (New Jersey, Skylands Region, NJ, US Mid-Atlantic Region, USA) |
2,560 ac | Lake Hopatcong is the largest lake in New Jersey, at about nine miles long with 45 miles of shoreline and covering 2,560 acres. Only 45 miles from New… |
| Round Valley Reservoir, NJ (New Jersey, Skylands Region, NJ, US Mid-Atlantic Region, USA) |
2,350 ac | Round Valley Reservoir spans 2,350 acres in Hunterdon County, New Jersey. The reservoir fills the valley formed by the ring-shaped Cushetunk Mountain,… |
| Greenwood Lake, NJ/NY (Gateway Region, NJ, Hudson Valley Region, NY, New Jersey, New York, US Mid-Atlantic Region, USA) |
1,920 ac | Formerly known as “Long Pond”, Greenwood Lake is a natural reservoir that straddles the New York/New Jersey border. The lake is the largest freshwater… |
| Spruce Run Reservoir, NJ (New Jersey, Skylands Region, NJ, US Mid-Atlantic Region, USA) |
1,290 ac | Spruce Run Reservoir is one of the oldest reservoirs in the state of New Jersey. Constructed in the 1960s to meet an increasing need for water supplie… |
| Lake Tappan, NJ/NY (Gateway Region, NJ, Hudson Valley Region, NY, New Jersey, New York, US Mid-Atlantic Region, USA) |
1,255 ac | Also known as Tappan Lake, Lake Tappan Reservoir, Tappan Reservoir Lake Tappan is one of a series of reservoirs that was created to deliver drinking water to the huge population of the New York City metro area. The la… |
| Union Lake, NJ (New Jersey, Southern Shore Region, NJ, US Mid-Atlantic Region, USA) |
898 ac | Union Lake is an 898-acre reservoir located in the town of Millville in southern New Jersey. The lake dates back to the 1790s, when the damming of the… |
| Lake Mohawk, NJ (New Jersey, Skylands Region, NJ, US Mid-Atlantic Region, USA) |
800 ac | Nestled in the town of Sparta, Lake Mohawk will take visitors and residents back in time with Tudor style architecture dotted around the lake. Althoug… |
| Manasquan Reservoir, NJ (New Jersey, Shore Region, NJ, US Mid-Atlantic Region, USA) |
720 ac | Also known as Manasquan County Reservoir Manasquan Reservoir is located in Monmouth County, New Jersey. Artifacts found near the reservoir indicate that its land was once occupied by the Lena… |
| Merrill Creek Reservoir, NJ (New Jersey, Skylands Region, NJ, US Mid-Atlantic Region, USA) |
650 ac | Merrill Creek Reservoir, located in Warren County, New Jersey, is a 650-acre man-made lake completed in 1988. The reservoir project took 13 years of p… |
| Culver Lake, NJ (New Jersey, Skylands Region, NJ, US Mid-Atlantic Region, USA) |
555 ac | Also known as Culvers Lake Culver Lake is an exclusive, privately owned body of water located in Sussex County New Jersey. The immaculate 555-acre lake has an average depth of 5… |
| Upper Greenwood Lake, NJ (Gateway Region, NJ, New Jersey, US Mid-Atlantic Region, USA) |
385 ac | Once a private summer resort lake, Upper Greenwood Lake is now home to full-time residents who enjoy lake living in north central New Jersey. Located… |
| Lake Musconetcong, NJ (New Jersey, Skylands Region, NJ, US Mid-Atlantic Region, USA) |
329 ac | In the early 1800’s, the Morris Canal and Banking Company was tasked with building a canal to help move freight across the New Jersey. In order to sup… |