Louisa, KY -- U.S. city in Kentucky Population (2000): 2018 Housing Units (2000): 1065 Land area (2000): 1.348786 sq. miles (3.493339 sq. km) Water area (2000): 0.028393 sq. miles (0.073538 sq. km) Total area (2000): 1.377179 sq. miles (3.566877 sq. km) FIPS code: 47854 Located within: Kentucky (KY), FIPS 21 Location: 38.112054 N, 82.605796 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Louisa, KY Louisa