Johnstown, NY -- U.S. city in New York Population (2000): 8511 Housing Units (2000): 3979 Land area (2000): 4.860401 sq. miles (12.588379 sq. km) Water area (2000): 0.006492 sq. miles (0.016814 sq. km) Total area (2000): 4.866893 sq. miles (12.605193 sq. km) FIPS code: 38781 Located within: New York (NY), FIPS 36 Location: 43.007350 N, 74.372109 W ZIP Codes (1990): 12095 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Johnstown, NY Johnstown