14138 -- U.S. ZIP code Municipality (1990): SOUTH DAYTON, New York All ZIPs for this municipality (1990): 14138 Population (2000): 2144 Housing Units (2000): 860 Land area (2000): 54.729825 sq. miles (141.749590 sq. km) Water area (2000): 0.224790 sq. miles (0.582203 sq. km) Total area (2000): 54.954615 sq. miles (142.331793 sq. km) Located within: New York (NY) Location: 42.372077 N, 79.055525 W