Dorchester, WI -- U.S. village in Wisconsin Population (2000): 827 Housing Units (2000): 354 Land area (2000): 1.309204 sq. miles (3.390822 sq. km) Water area (2000): 0.016114 sq. miles (0.041736 sq. km) Total area (2000): 1.325318 sq. miles (3.432558 sq. km) FIPS code: 20450 Located within: Wisconsin (WI), FIPS 55 Location: 45.002233 N, 90.331995 W ZIP Codes (1990): 54425 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Dorchester, WI Dorchester