Largest lakes & reservoirs in New Jersey by water volume
This is a comparison for lakes within USA > Mid-Atlantic > New Jersey > - Compared by Largest Lakes - Water Volume in acre-foot.For some lakes, "Largest Lakes - Water Volume" is unknown or does not apply, so this table may display fewer lakes than the total 21 articles we have published for New Jersey lakes.
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.
Search results: Sort lakes by water volume
Lake name ![]() |
Water vol. in ac-ft ![]() |
Lake description |
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Round Valley Reservoir (Mid-Atlantic, New Jersey, Skylands, USA) |
168,788 ac-ft | Round Valley Reservoir spans 2,350 acres in Hunterdon County, New Jersey. The reservoir fills the valley formed by the ring-shaped Cushetunk Mountain,… |
Lake Hopatcong (Mid-Atlantic, New Jersey, Skylands, USA) |
48,209 ac-ft | 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… |
Merrill Creek Reservoir (Mid-Atlantic, New Jersey, Skylands, USA) |
48,075 ac-ft | 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… |
Spruce Run Reservoir (Mid-Atlantic, New Jersey, Skylands, USA) |
33,758 ac-ft | 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… |
Manasquan Reservoir (Mid-Atlantic, New Jersey, Shore, USA) |
14,470 ac-ft | (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… |
Lake Tappan (Gateway, Hudson Valley, Mid-Atlantic, New Jersey, New York, USA) |
10,741 ac-ft | (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… |
Lake Owassa (Mid-Atlantic, New Jersey, Skylands, USA) |
3,437 ac-ft | A privately-owned association lake, Lake Owassa is located in Sussex County in the Culvers Gap Area of the Skyland Region. The lake is only 275-acres… |
Lake Carnegie (Delaware River, Mid-Atlantic, New Jersey, USA) |
1,906 ac-ft | (Also known as Carnegie Lake) Although steel magnate and philanthropist Andrew Carnegie is remembered for his library donations, one of his lesser-known gifts to society is Lake Ca… |
Oxford Furnace Lake (Mid-Atlantic, New Jersey, Skylands, USA) |
1,440 ac-ft | (Also known as Furnace Brook Watershed #2 Dam) What was once built for practical purposes of flood and erosion control is now a quiet lake area known as Oxford Furnace Lake in Warren County, New Je… |
Lake Aeroflex (Mid-Atlantic, New Jersey, Skylands, USA) |
360 ac-ft | (Also known as New Wawayanda Lake) Tucked away within New Jersey’s Skylands region, Lake Aeroflex is the crown jewel of the Kittatinny Valley State Park. Sometimes called New Wawayanda… |