Alamosa County GIS Maps
Alamosa County, Colorado, has 16,376 residents and covers 722.6 square miles. The population grew 6% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Alamosa County is 08003.
Alamosa is the county's largest population center. Alamosa County also includes 3 zip codes, 5 public school districts and 9 municipalities. Those boundaries help explain why population, schools, and housing can look different from one part of the county to another. The map below shows how those county lines, zip codes, and school districts fit together, and the sections that follow use that same geography to show population, demographics, school enrollment and housing patterns in more detail.
Maps, GIS layers and sample data. Paid packages add full layers, analytics and database files.
Alamosa County Trends
- Population
- 16,376▴
- Median Home Value
- $218,800▴
- K-12 Enrollment
- 3,898▾
County analytics dashboards with historical trends & projections included in package downloads.
Free starter access previews county maps, lightweight GIS, and sample data. Paid packages unlock full GIS layers, analytics, and database files.
Alamosa County Maps
The maps below show a few of the county map styles included in our downloads. County packages include map exports in JPEG, PNG, SVG, PDF and GeoTIFF formats plus more than 20 GIS layers for mapping, research and analysis. Available layers include zip codes, area codes, subdivisions, school districts, political boundaries, roads, water features, points of interest and more.
County packages also include historical county demographics, business intelligence, analytical dashboards, AI-ready prompts, markdown files and related reference data. Everything is organized to save hours of manual work collecting current data, cleaning it and joining it together. That makes it easier to move faster on analytics, due diligence, business planning and location research. Paid packages are built for commercial use, but some package contents include source-specific attribution or notice guidance. Review Licensing & Data Source Notices.
Alamosa County Population
Alamosa County had 16,376 residents in 2020. That was 6% higher than in 2010. Alamosa County added 1,410 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 23 people per square mile. Some of the county's most populated postal areas include Alamosa, Mosca and Hooper.
Population Trend in Alamosa County CO
Alamosa County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Alamosa County Zip Codes
Alamosa County has 3 zip codes. Some of the county's most populated zip codes include Alamosa (81101), Mosca (81146) and Hooper (81136). Alamosa is the largest zip by population, with about 15,657 residents or 96% of the county total. Together, the three largest zips account for about 100% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Alamosa County CO
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 81101 | Alamosa | 15,657 | ▴ 6.7% |
| 81146 | Mosca | 547 | ▴ 3% |
| 81136 | Hooper | 190 | ▾ -27.2% |
| Download all zip code data | |||
Alamosa County Zip Code populations and trends per most recent census data.
Alamosa County Demographics
Alamosa County has a median age of 33.1, which makes the county a little younger than Colorado overall. About 23.6% of residents are under 18, while 14.8% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 25 to 44 at about 31.3% of the population, which points to a solid working-age base. About 29.3% of adults have a bachelor's degree or higher, above the statewide figure of 44.7%. The county has a more diverse population mix, with no single race or ethnicity accounting for all of the local story.
Key Demographics for Alamosa County CO
Median Age
33.1
Under 18
23.6%
Age 65+
14.8%
Bachelor's+
29.3%
Alamosa County School Districts
Alamosa County is served by 5 public school districts with 3,898 students enrolled in 2024. The largest districts on the county map are Alamosa RE-11J, North Conejos RE-1J and Sanford 6J. Those three districts account for about 86% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, but it is slightly lower than it was in 2017.
Largest School Districts by Enrollment in Alamosa County CO
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Alamosa School District RE-11J | 2,038 | 52.3% | ▾ -0.9% |
| North Conejos School District RE-1J | 927 | 23.8% | ▾ -2.9% |
| Sanford School District 6J | 384 | 9.9% | ▾ -3.8% |
| Sargent School District RE-33J | 293 | 7.5% | ▾ -1.3% |
| Sangre de Cristo School District RE-22J | 256 | 6.6% | ▾ -7.6% |
| Download all school district data | |||
Alamosa County school district enrollment and trends per most recent NCES reporting data.
Alamosa County Housing & Real Estate
Alamosa County has a median home value of $218,800 and a median gross rent of $904. About 56% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Colorado median, while rents come in below the state average. In March 2026, the median listing price was $351,500 and homes spent about 80 days on the market.
Alamosa County Housing Mix
Alamosa County housing mix: owner, renter and vacant units.
Alamosa County Housing Trends
Alamosa County median home value and rent trend (last 5 years).
Businesses in Alamosa County, CO
Alamosa County has 967 business listings across 350 categories. The largest categories in Alamosa County business listings are Churches & Religious Organizations (24, 2.5%), Parks & Recreation (18, 1.9%), and Hotels (17, 1.8%). The full Alamosa County business listings dataset includes names, categories, addresses and contact details where available. Alamosa County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Alamosa County, CO
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 24 | 2.5% |
| Parks & Recreation | 18 | 1.9% |
| Hotels | 17 | 1.8% |
| Community & Nonprofits | 16 | 1.7% |
| Auto Repair | 16 | 1.7% |
| Beauty Salons | 14 | 1.4% |
| Public And Government Association | 14 | 1.4% |
| Mexican Restaurants | 14 | 1.4% |
| Landmark And Historical Building | 13 | 1.3% |
| Campgrounds & RV Parks | 13 | 1.3% |
Alamosa County Business Listings
| Business | Category | City |
|---|---|---|
| Crossroads' Turning Points | Abuse And Addiction Treatment | Alamosa |
| Adams State University Bookstore | Academic Bookstore | Alamosa |
| Great Sand Dunes Oasis | Accommodation | Mosca |
| Wall Smith Bateman & Associates | Accountant | Alamosa |
| SLV Alternative Health | Acupuncture | Alamosa |
| Sweet Grass Beef | Agricultural Cooperatives | Alamosa |
| John Deere | Agriculture | Alamosa |
| Centric Aviation ALS - Alamosa, CO | Airport | Alamosa |
| Alamosa Volunteer Search And Rescue | Ambulance And Ems Services | Alamosa |
| Campus Cafe | American Restaurants | Alamosa |
| Download Alamosa County business listings | ||
Alamosa County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Alamosa County Basemaps
Alamosa County map and data packages include a set of useful basemaps to help you get started quickly. These include a custom light grey canvas, USGS topo, imagery and other reference layers that make it easier to build clear, meaningful county maps using the included GIS layers, your own data or both. Pre-rendered map tiles for the light grey basemap are included so you can use them offline or host them on your own CDN.
Get the Full Alamosa County Data Package
This page shows a preview of what's included in the Alamosa County data package. The full package gives you a ready-to-use county data system with GIS layers, historical data, maps, database files and planning tools that save hours of manual data gathering, cleanup and joins. Everything is organized to help you skip data wrangling and start analysis faster.
- 20+ GIS layers for zip codes, school districts, roads, water, boundaries and more
- Historical county demographics, housing, income and trend data
- ZIP code population files and school district enrollment history
- Database files, markdowns, AI-ready prompts and documentation
- Map exports in PNG, JPEG, PDF, SVG and GeoTIFF formats
- Offline-ready data explorer, map and analytics tools
Paid packages support commercial use, client work, and derived outputs. Some package contents may include source-specific attribution or provider notices. See Licensing & Data Source Notices.
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Nearby Counties
Browse county data pages for the counties that border Alamosa County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.