Adams County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 519,572. The county seat is Brighton, and the largest city is Thornton. The county is named for Alva Adams, an early Governor of the State of... Wikipedia
Cities: Thornton, Commerce City, Federal Heights, and more
County seat: Brighton
Largest city: Thornton
Named for: Alva Adams