Costilla County GIS Maps
Costilla County, Colorado, has 3,499 residents and covers 1,227.6 square miles. The population declined 0.7% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Costilla County is 08023.
San Luis is the county's largest population center. Costilla County also includes 6 zip codes, 2 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.
Costilla County Trends
- Population
- 3,499▾
- Median Home Value
- $171,300▴
- K-12 Enrollment
- 493▴
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.
Costilla 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.
Costilla County Population
Costilla County had 3,499 residents in 2020. That was 0.7% lower than in 2010. Costilla County had 164 fewer people in 2020 than it did in 2000, which points to a long-term population decline. The county is fairly spread out, with about 3 people per square mile. Some of the county's most populated postal areas include Sanford, San Luis and Fort Garland.
Population Trend in Costilla County CO
Costilla County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Costilla County Zip Codes
Costilla County has 6 zip codes. Some of the county's most populated zip codes include Sanford (81151), San Luis (81152) and Fort Garland (81133). Sanford is the largest zip by population, with about 1,527 residents or 44% of the county total. Together, the three largest zips account for about 109% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Costilla County CO
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 81151 | Sanford | 1,527 | ▴ 3.9% |
| 81152 | San Luis | 1,294 | ▾ -9.8% |
| 81133 | Fort Garland | 1,009 | ▴ 20.1% |
| 81123 | Blanca | 727 | ▾ -9.7% |
| 81126 | Chama | 239 | ▾ -13.4% |
| Download all zip code data | |||
Costilla County Zip Code populations and trends per most recent census data.
Costilla County Demographics
Costilla County has a median age of 50.7, which makes the county a little older than Colorado overall. About 18.8% of residents are under 18, while 27.5% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 65 and over at about 27.5% of the population, which points to an older population profile. About 27.8% 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 Costilla County CO
Median Age
50.7
Under 18
18.8%
Age 65+
27.5%
Bachelor's+
27.8%
Costilla County School Districts
Costilla County is served by 2 public school districts with 493 students enrolled in 2024. Several larger districts account for a substantial share of students across the county map area. Those three districts account for about 100% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, based on district totals from 2017 to 2024.
Largest School Districts by Enrollment in Costilla County CO
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Sierra Grande School District R-30 | 307 | 62.3% | ▴ 1.7% |
| Centennial School District R-1 | 186 | 37.7% | — 0% |
| Download all school district data | |||
Costilla County school district enrollment and trends per most recent NCES reporting data.
Costilla County Housing & Real Estate
Costilla County has a median home value of $171,300 and a median gross rent of $857. About 79% 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 $307,500 and homes spent about 155 days on the market.
Costilla County Housing Mix
Costilla County housing mix: owner, renter and vacant units.
Costilla County Housing Trends
Costilla County median home value and rent trend (last 5 years).
Businesses in Costilla County, CO
Costilla County has 153 business listings across 85 categories. The largest categories in Costilla County business listings are Mountain (11, 7.2%), Structure And Geography (6, 3.9%), and Churches & Religious Organizations (5, 3.3%). The full Costilla County business listings dataset includes names, categories, addresses and contact details where available. Costilla County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Costilla County, CO
| Category | Businesses | Share |
|---|---|---|
| Mountain | 11 | 7.2% |
| Structure And Geography | 6 | 3.9% |
| Churches & Religious Organizations | 5 | 3.3% |
| Landmark And Historical Building | 5 | 3.3% |
| Public And Government Association | 5 | 3.3% |
| Propane Supplier | 4 | 2.6% |
| Auto Repair | 4 | 2.6% |
| Discount Store | 4 | 2.6% |
| Community & Nonprofits | 4 | 2.6% |
| Convenience Stores | 4 | 2.6% |
Costilla County Business Listings
| Business | Category | City |
|---|---|---|
| San Acacio Seed | Agricultural Service | Costilla County |
| Lu's Main Street Cafe | American Restaurants | Blanca |
| Blanca/ Ft Garland Community Center | Amusement Park | Blanca |
| Forest Tango Art Works | Art Gallery | Blanca |
| Community Banks of Colorado - ATM | ATMs | San Luis |
| BiG DoG's BoNe YaRd | Auto Repair | San Luis |
| La Bóveda “The Vault” | Bakeries | San Luis |
| Central Tavern | Bars & Nightlife | San Luis |
| 101 Bar & Grill | Bar And Grill Restaurant | San Luis |
| Still Whiskey BBQ | Barbecue Restaurant | Fort Garland |
| Download Costilla County business listings | ||
Costilla County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Costilla County Basemaps
Costilla 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 Costilla County Data Package
This page shows a preview of what's included in the Costilla 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 Costilla County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.