Keenesburg, CO -- U.S. town in Colorado Population (2000): 855 Housing Units (2000): 313 Land area (2000): 0.564334 sq. miles (1.461618 sq. km) Water area (2000): 0.007039 sq. miles (0.018232 sq. km) Total area (2000): 0.571373 sq. miles (1.479850 sq. km) FIPS code: 40185 Located within: Colorado (CO), FIPS 08 Location: 40.108821 N, 104.520228 W ZIP Codes (1990): 80643 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Keenesburg, CO Keenesburg