Trenton, MI -- U.S. city in Michigan Population (2000): 19584 Housing Units (2000): 8345 Land area (2000): 7.299709 sq. miles (18.906159 sq. km) Water area (2000): 0.199790 sq. miles (0.517454 sq. km) Total area (2000): 7.499499 sq. miles (19.423613 sq. km) FIPS code: 80420 Located within: Michigan (MI), FIPS 26 Location: 42.142191 N, 83.195356 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Trenton, MI Trenton