Dearborn, MO -- U.S. city in Missouri Population (2000): 529 Housing Units (2000): 258 Land area (2000): 0.858955 sq. miles (2.224682 sq. km) Water area (2000): 0.012623 sq. miles (0.032693 sq. km) Total area (2000): 0.871578 sq. miles (2.257375 sq. km) FIPS code: 18658 Located within: Missouri (MO), FIPS 29 Location: 39.522464 N, 94.769183 W ZIP Codes (1990): 64439 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Dearborn, MO Dearborn