Ladysmith, WI -- U.S. city in Wisconsin Population (2000): 3932 Housing Units (2000): 1660 Land area (2000): 3.897466 sq. miles (10.094391 sq. km) Water area (2000): 0.368836 sq. miles (0.955282 sq. km) Total area (2000): 4.266302 sq. miles (11.049673 sq. km) FIPS code: 40850 Located within: Wisconsin (WI), FIPS 55 Location: 45.463787 N, 91.099867 W ZIP Codes (1990): 54848 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Ladysmith, WI Ladysmith