Plainfield, WI -- U.S. village in Wisconsin Population (2000): 899 Housing Units (2000): 373 Land area (2000): 1.297430 sq. miles (3.360328 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.297430 sq. miles (3.360328 sq. km) FIPS code: 63150 Located within: Wisconsin (WI), FIPS 55 Location: 44.211943 N, 89.492803 W ZIP Codes (1990): 54966 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Plainfield, WI Plainfield