11755 -- U.S. ZIP code Municipality (1990): LAKE GROVE, New York All ZIPs for this municipality (1990): 11755 Population (2000): 11402 Housing Units (2000): 3868 Land area (2000): 3.299913 sq. miles (8.546735 sq. km) Water area (2000): 0.001474 sq. miles (0.003817 sq. km) Total area (2000): 3.301387 sq. miles (8.550552 sq. km) Located within: New York (NY) Location: 40.855402 N, 73.118392 W