11964 -- U.S. ZIP code Municipality (1990): SHELTER ISLAND, New York All ZIPs for this municipality (1990): 11964 Population (2000): 1148 Housing Units (2000): 995 Land area (2000): 6.718131 sq. miles (17.399879 sq. km) Water area (2000): 0.109555 sq. miles (0.283747 sq. km) Total area (2000): 6.827686 sq. miles (17.683626 sq. km) Located within: New York (NY) Location: 41.060843 N, 72.331594 W