Colorado · FIPS 08023 · County seat: San Luis
Costilla County, CO GIS & Parcel Viewer
Here is the direct link to the county parcel map covering Costilla County, CO: the Costilla County ArcGIS parcel map. Below you'll find basic facts about the county, steps for using the viewer, and nearby counties.
Open the Costilla County parcel map ↗
Opens experience.arcgis.com in a new tab. We link out and never embed or copy parcel data.
Quick facts
| Official map | Costilla County ArcGIS parcel map |
|---|---|
| Type | County-run map |
| Website | experience.arcgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | San Luis |
| Population | 3,628 (2023 Census Bureau estimate) |
| Land area | 1,228 sq mi |
| FIPS code | 08023 |
About the official source
This map is published by or for Costilla County itself, so it reflects the local parcel layer rather than a third-party copy. As of our October 2026 test, anyone could open it without signing in or paying.
Finding a property on this map
- Press the button above; an ArcGIS Experience Builder app opens in a new tab. Accept any splash or disclaimer screen.
- Search by address or parcel ID, or pan to the area.
- Select a parcel to view the information the publisher makes available.
- Explore the app's panels for layers, legends or printing.
Have a tax bill handy? The parcel or account number on it is usually the fastest way to search.
Costilla County by the numbers
Costilla County had an estimated 3,628 residents in 2023, according to the Census Bureau. With about 1,228 square miles of land, that works out to roughly 3.0 people per square mile. By population it ranks 55th of 64 counties in Colorado. The county seat is San Luis.
Counties next to Costilla County
If the property sits near a county line, the parcel may belong to a neighbor. These counties border Costilla County:
- Alamosa County
- Conejos County (state list)
- Huerfano County (state list)
- Las Animas County
- Colfax County, NM
- Taos County, NM
More on Costilla County parcel maps
Before you rely on the lines
Keep in mind that a GIS parcel layer is a tax map, not a survey. For exact boundaries, look at the recorded deed and plat or hire a licensed land surveyor.