Alamosa is a home rule city located in south-central Colorado, United States. It serves as the county seat and the most populous municipality within Alamosa County. The city is situated along the Rio Grande and functions as the primary city of the Alamosa, CO Micropolitan Statistical Area.
As the commercial center of the San Luis Valley, Alamosa has a population of 9,806 residents according to the 2020 United States census. The city is also notable for being the home of Adams State University.