13348 -- U.S. ZIP code Municipality (1990): HARTWICK, New York All ZIPs for this municipality (1990): 13348 Population (2000): 1359 Housing Units (2000): 652 Land area (2000): 35.401969 sq. miles (91.690674 sq. km) Water area (2000): 0.012410 sq. miles (0.032143 sq. km) Total area (2000): 35.414379 sq. miles (91.722817 sq. km) Located within: New York (NY) Location: 42.708284 N, 75.058806 W