Janesville, MN -- U.S. city in Minnesota Population (2000): 2109 Housing Units (2000): 848 Land area (2000): 1.275658 sq. miles (3.303940 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.275658 sq. miles (3.303940 sq. km) FIPS code: 31706 Located within: Minnesota (MN), FIPS 27 Location: 44.117764 N, 93.708057 W ZIP Codes (1990): 56048 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Janesville, MN Janesville