County · code 08003
Alamosa CountyColorado
Alamosa County is a county in Colorado with its seat in Alamosa. It was created on March 8, 1913, from parts of Conejos and Costilla counties.
- Founded1913
- County seatAlamosa
- Land area723 sq mi + 0.6 sq mi water
- Population16,376 2020 Census
Where it is
Alamosa on the map of Colorado
Colorado has 64 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1913 from Conejos County and Costilla County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Alamosa County was formed in 1913 from Conejos County and Costilla County. Alamosa is the county seat.
Deeds and plats from before 1913 for land now in Alamosa County may have been recorded in Conejos County and Costilla County.
- 1913Alamosa County created Alamosa created from Conejos and Costilla. · Colo. Laws 1913, 19th sess., ch. 6, pp. 19-24
Land and parcels
What the maps cover in Alamosa
Who publishes each layer, how good it is, and when we last checked.
-
Parcels Missing
No public parcel map found for Alamosa County yet. Lot lines and owners of record are kept by the county (alamosacounty.org).
-
Address points Missing
No public address points layer found for Alamosa County yet.
-
Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- Official
- from the office that keeps the record
- Good enough
- a reliable statewide or national copy
- Fallback
- a guide only; check the official record
- Missing
- nothing public found yet
People and land
Alamosa by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
Rules and offices
Who to ask before you build, dig or sell
Official county pages only. We link to them; we do not copy them, because they change.
Inside a city or town, permits usually come from that city rather than the county.
Records
- Clerk of court: deeds and plats
Clerk & Recorder
Permits
County government
- County government
The official website of Alamosa County.
See your own lot on these maps
Open Alamosa County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.
Questions
Common questions about Alamosa County
- When was Alamosa County founded?
- Alamosa County was founded in 1913, formed from Conejos County and Costilla County.
- What is the county seat of Alamosa County?
- The county seat of Alamosa County is Alamosa.
- Is there an online parcel map for Alamosa County?
- Not that we have found yet. Lot lines and owners of record are kept by the county assessor's office. When a public parcel map appears, it shows here.
- Has Alamosa County's boundary or name changed?
- Alamosa County was created in 1913 from Conejos County and Costilla County. The Atlas of Historical County Boundaries records no boundary change since.
- Who issues building permits in Alamosa County?
- The county's page on building permits: Concealed Handgun Permit. Inside a city or town, ask that city first.
- Who issues septic and well permits in Alamosa County?
- The county's page on septic systems and wells: Public Health.
- Is my lot in a flood zone?
- We do not have flood maps for Alamosa County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby