Basalt is a home rule municipality located in Eagle and Pitkin counties, Colorado, United States. The town population was 3,984 at the 2020 United States Census with 2,917 residing in Eagle County and 1,067 residing in Pitkin County. Basalt is a part of the Edwards-Glenwood Springs, CO Combined Statistical Area.

Eagle County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 55,731. The county seat is the Town of Eagle and the most populous community is Edwards. The county is named for the Eagle River.