| Name | Costilla County |
| State | Colorado |
| FIPS Code | 08023 |
| County Seat | San Luis |
| Timezone | Mountain Daylight Time (MDT) |
| Population (2024) | 3,624 |
| Population Growth Rate(2020-2024) | 3.53% |
| Majority Ethnicity | Hispanic 47.8% |
| Public School Majority Ethnicity | Hispanic 80% |
| Partisan Voting Index | Democratic:+9 |
| Unemployment Rate (May 2026) | 8.4% |
| Sales Tax Rate (2025) | 4.9% |
| Area Code(s) | 719 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 45.03% |
| African American | 3.01% |
| Hispanic | 47.8% |
| Asian | 1.01% |
| Native American | 3.15% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 17.43% |
| African American | 0.21% |
| Hispanic | 80.5% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.21% |