11724 -- U.S. ZIP code Municipality (1990): COLD SPRING HARB, New York All ZIPs for this municipality (1990): 11724 Population (2000): 3040 Housing Units (2000): 1007 Land area (2000): 3.183681 sq. miles (8.245696 sq. km) Water area (2000): 0.016756 sq. miles (0.043399 sq. km) Total area (2000): 3.200437 sq. miles (8.289095 sq. km) Located within: New York (NY) Location: 40.865731 N, 73.446453 W