Costilla County, Colorado ZIP codes
6 ZIP codes are in Costilla County, plus 1 that cross in from neighboring counties. It's part of the Alamosa, CO micro area.
- ZIP codes
- 6
- Population in these ZIPs
- 5,174
- Avg. median income
- $41,300population-weighted
- Cities & towns
- 6
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Costilla County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 81123 | Blanca | 606 | $36,487 | $178,100 |
| 81126 | Chama | 506 | $52,870 | $170,400 |
| 81133 | Fort Garland | 1,085 | $45,833 | $245,600 |
| 81138 | Jaroso | 17 | — | — |
| 81151 | Sanford | 1,716 | $43,417 | $209,700 |
| 81152 | San Luis | 1,244 | $31,875 | $135,400 |
ZIP codes partly in Costilla County
These ZIP codes are mostly in a neighboring county but cover part of Costilla County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 81055 | La Veta | Huerfano County | 1,559 | $55,080 | $380,500 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Costilla County
Nearby counties
Frequently asked questions
How many ZIP codes are in Costilla County, Colorado?
6 ZIP codes are mainly in Costilla County, and 1 more ZIP codes from neighboring areas reach partly into it.
What cities are in Costilla County?
ZIP codes in Costilla County use the city names Blanca, Chama, Fort Garland, Jaroso, San Luis and Sanford.
What metro area is Costilla County in?
Costilla County is part of the Alamosa, CO micropolitan statistical area.