Frederick, CO -- U.S. town in Colorado Population (2000): 2467 Housing Units (2000): 896 Land area (2000): 8.613439 sq. miles (22.308703 sq. km) Water area (2000): 0.091186 sq. miles (0.236170 sq. km) Total area (2000): 8.704625 sq. miles (22.544873 sq. km) FIPS code: 28360 Located within: Colorado (CO), FIPS 08 Location: 40.111175 N, 104.960967 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Frederick, CO Frederick