Alamosa, CO micro area ZIP codes
The Alamosa, CO micropolitan statistical area (CBSA 10480) covers 3 counties in Colorado and 16 ZIP codes.
- ZIP codes
- 16
- Population
- 27,561
- Avg. median income
- $51,900population-weighted
- Counties
- 3
Click anywhere on the map to see which ZIP code it's in.
Counties in the Alamosa, CO area
ZIP codes in the Alamosa, CO area
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 81101 | Alamosa | Alamosa County | 15,550 | $54,844 | $313,700 |
| 81102 PO Box | Alamosa | Alamosa County | — | — | — |
| 81120 | Antonito | Conejos County | 1,832 | $47,546 | $224,100 |
| 81123 | Blanca | Costilla County | 606 | $36,487 | $178,100 |
| 81124 | Capulin | Conejos County | 259 | $88,793 | $79,300 |
| 81126 | Chama | Costilla County | 506 | $52,870 | $170,400 |
| 81129 | Conejos | Conejos County | 118 | — | — |
| 81133 | Fort Garland | Costilla County | 1,085 | $45,833 | $245,600 |
| 81136 | Hooper | Alamosa County | 305 | $47,448 | $193,300 |
| 81138 | Jaroso | Costilla County | 17 | — | — |
| 81140 | La Jara | Conejos County | 1,893 | $46,781 | $220,200 |
| 81141 | Manassa | Conejos County | 1,406 | $59,539 | $181,600 |
| 81146 | Mosca | Alamosa County | 637 | $69,556 | $349,300 |
| 81148 | Romeo | Conejos County | 387 | $45,469 | $123,800 |
| 81151 | Sanford | Costilla County | 1,716 | $43,417 | $209,700 |
| 81152 | San Luis | Costilla County | 1,244 | $31,875 | $135,400 |
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
Frequently asked questions
How many ZIP codes are in the Alamosa, CO micro area?
16 ZIP codes, based on each ZIP code's main county.
Which counties make up the Alamosa, CO area?
Alamosa County, Conejos County and Costilla County.
What is an MSA?
A metropolitan statistical area (MSA) is a core city of 50,000+ people plus the surrounding counties tied to it by commuting, as defined by the U.S. Office of Management and Budget. Micropolitan areas have a core of 10,000–50,000. Together they are called core-based statistical areas (CBSAs).