Plymouth, WI -- U.S. city in Wisconsin Population (2000): 7781 Housing Units (2000): 3395 Land area (2000): 4.104979 sq. miles (10.631846 sq. km) Water area (2000): 0.062929 sq. miles (0.162986 sq. km) Total area (2000): 4.167908 sq. miles (10.794832 sq. km) FIPS code: 63700 Located within: Wisconsin (WI), FIPS 55 Location: 43.749277 N, 87.976799 W ZIP Codes (1990): 53073 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Plymouth, WI Plymouth