Washington -- U.S. County in Colorado Population (2000): 4926 Housing Units (2000): 2307 Land area (2000): 2520.980318 sq. miles (6529.308773 sq. km) Water area (2000): 3.134710 sq. miles (8.118861 sq. km) Total area (2000): 2524.115028 sq. miles (6537.427634 sq. km) Located within: Colorado (CO), FIPS 08 Location: 40.082191 N, 103.143089 W Headwords: Washington Washington, CO Washington County Washington County, CO