11789 -- U.S. ZIP code Municipality (1990): SOUND BEACH, New York All ZIPs for this municipality (1990): 11789 Population (2000): 7660 Housing Units (2000): 2934 Land area (2000): 1.849183 sq. miles (4.789362 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.849183 sq. miles (4.789362 sq. km) Located within: New York (NY) Location: 40.955586 N, 72.973304 W