Colorado's 3rd congressional district is a congressional district in the U.S. state of Colorado. It takes in most of the rural Western Slope in the state's western third portion, with a wing in the south taking in some of the southern portions of the Eastern Plains. It includes the cities of Grand Junction, Durango, Aspen, Glenwood Springs, Ignacio, and Pueblo. The district has been represented by Republican Lauren Boebert since 2021.

Pueblo is a home rule municipality that is the county seat and the most populous municipality of Pueblo County, Colorado, United States. The city population was 111,876 at the 2020 United States Census, making Pueblo the ninth most populous city in Colorado. Pueblo is the principal city of the Pueblo, CO Metropolitan Statistical Area and a major city of the Front Range Urban Corridor.