Department of Environmental Conservation

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Knapps Lake, Islip

Knapps Lake is a small pond located in Islip. It is quite shallow and in the summer it becomes thickly covered with aquatic plants.

Physical Features:

Elevation: 9 feet
Area: 30 acres
Shoreline Length: 0.87 miles
Maximum depth: 3 feet
Town: Islip


Town of Islip, Brookwood Hall Town Park

Directions: Knapps Lake lies just south of Union Avenue and just north of Montauk Highway (Route 27A) in Islip.

Restrictions: Boats are prohibited, and shoreline access is limited.

Fish Species:

Largemouth Bass, Sunfish, Carp


The predominant fish species are common carp, largemouth bass and sunfish. The fish tend to be small. While large bass have been caught at Knapps Lake, they are not common. Few exceed 12 inches.

Knapps Lake provides some fishing opportunity to the immediate neighborhood, but it probably does not merit a long trip.


Statewide Fishing Regulations Apply

Health Advice on Eating Fish You Catch:

Visit NYS Department of Health website (link leaves DEC's website) for health advice on eating fish you catch. Scroll to the bottom of the page for Long Island freshwater waterbodies.