Costilla County, county in Colorado, United States. As of 2020 county had an estimated population of 3,921 inhabitants. The county was created 160 years ago in 1861. Its county seat is "San Luis".
There are 0 city/town in Costilla County, CO.
Cities, Towns, Neighborhoods & Other Populated Places in Costilla County.
City Name | Title | County | Population |
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