12457 -- U.S. ZIP code Municipality (1990): MOUNT TREMPER, New York All ZIPs for this municipality (1990): 12457 Population (2000): 1123 Housing Units (2000): 691 Land area (2000): 18.247157 sq. miles (47.259918 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 18.247157 sq. miles (47.259918 sq. km) Located within: New York (NY) Location: 42.038539 N, 74.239055 W