Libby, MT -- U.S. city in Montana Population (2000): 2626 Housing Units (2000): 1264 Land area (2000): 1.273612 sq. miles (3.298641 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.273612 sq. miles (3.298641 sq. km) FIPS code: 43450 Located within: Montana (MT), FIPS 30 Location: 48.388128 N, 115.553707 W ZIP Codes (1990): 59923 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Libby, MT Libby