El Paso County is the most populous county located in the American state of Colorado. As of the 2020 Census, the population was 730,395, surpassing the City and County of Denver. The county seat is Colorado Springs, the second most populous city in Colorado. El Paso County is included in the Colorado Springs, Colorado, Metropolitan Statistical Area.

Colorado Springs is a city in and the county seat of El Paso County, Colorado, United States. It is the most populous city in El Paso County, with a population of 478,961 at the 2020 census, a 15.02% increase since 2010. Colorado Springs is the second-most populous city and the most extensive city in the state of Colorado, and the 39th-most-populous city in the United States. It is the principal city of the Colorado Springs metropolitan area and the second-most prominent city of the Front Range Urban Corridor. It is located in east-central Colorado on Fountain Creek, 70 miles (113 km) south of Denver.