Welcome to Alamosa County ...Time Zone: Alamosa County lies in the Mountain Time Zone (MST/MDT) and observes daylight saving time. The community of Alamosa is the Seat for Alamosa County. Alamosa County was founded March 8, 1913. Alamosa was created by taking area from Costilla and Conejos Counties. From the Census Estimates for 2019, <1> Alamosa had a population of 16,233 people. This is an increase of 4.63% since the last Census (which gave a population of 15,515 people in 2010). At the time of the 2010 Census, Alamosa represented 0.31% of the total population of Colorado. Websites of Interest ...
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