Blanca is a Statutory Town located in Costilla County, Colorado, United States. The town population was 322 at the 2020 census. Blanca is located in the enormous San Luis Valley. The Blanca, Colorado, post office opened on October 5, 1894. Blanca is named for Blanca Peak, A land lottery in August 1908 spurred growth. The Town of Blanca was …Blanca is a Statutory Town located in Costilla County, Colorado, United States. The town population was 322 at the 2020 census. Blanca is located in the enormous San Luis Valley. The Blanca, Colorado, post office opened on October 5, 1894. Blanca is named for Blanca Peak, A land lottery in August 1908 spurred growth. The Town of Blanca was incorporated on May 18, 1910.
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