Alamosa County, Colorado
Alamosa County, Colorado, has 16,688 residents (July 2025 estimate). Its county seat is Alamosa. It uses Mountain Time and covers 723 sq mi (1,872 km²) of land.
- Resident population, July 2025
- 16,688
- Land area
- 723 sq mi (1,872 km²)
- County seat or government
- Alamosa
- Time zone
- Mountain TimeUTC-07:00 in January; UTC-06:00 in July
- Median household income
- $55,397 ± $4,512
- Median home value
- $239,100 ± $21,277
- Median rent, with utilities
- $907 ± $85
- Homes lived in by their owners
- 55.9% ± 4.3 points
- County type
- County
- Metro or micro area
- Alamosa, CO micro areaCentral county
- Water area
- 0.64 sq mi (1.67 km²)
- State
- Colorado
- County code (FIPS)
- 08003
- Coordinates (central point)
- 37.568442, -105.788041
These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
Time zones in Alamosa County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Mountain TimeAmerica/Denver | UTC-07:00 in January; UTC-06:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
5 ZIP Code areas overlap Alamosa County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Official county information
Alamosa County government website ↗ is the next stop for county offices, tax, voting, jury and records information. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
School districts in Alamosa County, largest first
- Alamosa School District RE-11J15,067 people
- North Conejos School District RE-1J4,519 people
- Center School District 26-JT2,957 people
- Sanford School District 6J1,588 people
- Sangre de Cristo School District RE-22J1,399 people
- Sargent School District RE-33J1,111 people
Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.
Cities, towns and communities, largest first
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Alamosa, Colorado (city)9,879 people
- Alamosa East, Colorado (CDP)1,298 people
- Hooper, Colorado (town)152 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Costilla County, Colorado28 mi southeast
- Conejos County, Colorado33 mi southwest
- Rio Grande County, Colorado37 mi west
- Saguache County, Colorado40 mi northwest
- Huerfano County, Colorado46 mi east
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