Waupun, WI -- U.S. city in Wisconsin Population (2000): 10718 Housing Units (2000): 3512 Land area (2000): 3.687838 sq. miles (9.551456 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 3.687838 sq. miles (9.551456 sq. km) FIPS code: 84425 Located within: Wisconsin (WI), FIPS 55 Location: 43.631577 N, 88.735835 W ZIP Codes (1990): 53963 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Waupun, WI Waupun