Merrill, WI -- U.S. city in Wisconsin Population (2000): 10146 Housing Units (2000): 4397 Land area (2000): 7.037754 sq. miles (18.227698 sq. km) Water area (2000): 0.492966 sq. miles (1.276776 sq. km) Total area (2000): 7.530720 sq. miles (19.504474 sq. km) FIPS code: 51250 Located within: Wisconsin (WI), FIPS 55 Location: 45.182569 N, 89.695590 W ZIP Codes (1990): 54452 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Merrill, WI Merrill