Costilla County, county in Colorado, United States. As of 2020 county had an estimated population of 3,921 inhabitants. The county was created 163 years ago in 1861. Its county seat is San Luis.
There are 2 city/town in Costilla County, CO. The largest city of Costilla County is San Luis with a population of 692. Other cities include and Blanca population 407
San Luis, County seat of Costilla County, Colorado, United States
Blanca, Human settlement in Costilla County, Colorado, United States of America
List of cities, towns, neighborhoods & other populated places in Costilla County.
| City Name | Title | Population |
|---|---|---|
| Blanca | Human settlement in Costilla County, Colorado, United States of America | 407 |
| San Luis | County seat of Costilla County, Colorado, United States | 692 |
