Bonanza, CO -- U.S. town in Colorado Population (2000): 14 Housing Units (2000): 33 Land area (2000): 0.438258 sq. miles (1.135082 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.438258 sq. miles (1.135082 sq. km) FIPS code: 07571 Located within: Colorado (CO), FIPS 08 Location: 38.295138 N, 106.140158 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Bonanza, CO Bonanza