Kirtland, OH -- U.S. city in Ohio Population (2000): 6670 Housing Units (2000): 2558 Land area (2000): 16.599570 sq. miles (42.992687 sq. km) Water area (2000): 0.111009 sq. miles (0.287512 sq. km) Total area (2000): 16.710579 sq. miles (43.280199 sq. km) FIPS code: 40642 Located within: Ohio (OH), FIPS 39 Location: 41.602581 N, 81.344706 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Kirtland, OH Kirtland