Northfield, KY -- U.S. city in Kentucky Population (2000): 970 Housing Units (2000): 421 Land area (2000): 0.441599 sq. miles (1.143735 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.441599 sq. miles (1.143735 sq. km) FIPS code: 56730 Located within: Kentucky (KY), FIPS 21 Location: 38.286319 N, 85.636376 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Northfield, KY Northfield