Weld -- U.S. County in Colorado Population (2000): 180936 Housing Units (2000): 66194 Land area (2000): 3992.446945 sq. miles (10340.389679 sq. km) Water area (2000): 29.110201 sq. miles (75.395072 sq. km) Total area (2000): 4021.557146 sq. miles (10415.784751 sq. km) Located within: Colorado (CO), FIPS 08 Location: 40.346681 N, 104.728213 W Headwords: Weld Weld, CO Weld County Weld County, CO