Costilla County land: parcels
44,750 parcels
On the county tax roll
County roll 2026 · Map data Oct 26, 2026
- Acres on the roll674,527
- In a FEMA flood zoneNot on the digital map100% of parcels here are outside FEMA's digital flood map
Property tax calendar
Colorado 2026 taxes: bills go out in January 2027; first half due March 1, 2027, second half June 15, 2027.
- First half
- March 1, 2027On the 2026 values; or pay the whole bill by April 30, 2027
- Second half
- June 15, 2027A late half accrues 1% interest a month
- Value protests
- To the assessor by June 8 (next working day when it falls on a weekend)Then to the county board of equalization
Free account: 25 parcel cards a day on the map, with watches and a saved search. Get started free
No zoning layer for Costilla County yet. Its planning office (or a town's, inside town limits) can say which zoning, if any, applies to a parcel.
Towns and census places in Costilla County
- Blanca727 parcels
- San Luis397 parcels
- San Acacio286 parcels
- Fort Garland253 parcels
Flood zones and wetlands
Recorded flood claims in Costilla County
Fewer than 10 insured flood claims were recorded in Costilla County since 1978.
Land in Costilla County by useLand use on the county roll
| Land class | Parcels | Share |
|---|---|---|
| Other or not coded | 42,841 | 96% |
| Building on record | 1,898 | 4.2% |
| Institutional | 10 | under 0.1% |
| Farm and timber | 1 | under 0.1% |
1 farm and timber parcels cover 1,682 acres. County tax roll 2026 (county service read Oct 2026); land class read from the roll's land-use and building fields.
Typical lot sizeThe typical lot, from the roll
The median parcel in Costilla County is 4.95 acres (44,295 parcels with a size).
Acres from the county roll, or from the parcel's own outline where the roll's figure is off by more than three times. Condominium units that share one point (each carrying the whole complex's acres) are left out of the lot sizes.
Land parcels in Costilla CountyFarm and timber parcels to start with
Farm and timber parcels of an acre or more, each with its own page of public roll facts.
Questions about Costilla County landAnswers from the public records
How many parcels are in Costilla County, CO?
44,750 parcels on the 2026 Costilla County tax roll (county service read Oct 2026), covering 674,527 acres.
How much vacant land is in Costilla County, CO?
Colorado's vacant-land class failed our statewide aerial check (19 of 120 lots sampled across the state were in use or doubtful: a house, a salvage yard, trailer homes, a farmstead, irrigated hay meadows, lots still under crop), so we don't call any parcel in Costilla County vacant land.
What is the typical lot size in Costilla County?
The median parcel is 4.95 acres, from 44,295 parcels with a recorded size.
How much of Costilla County is in a flood zone?
100% of parcels here are outside FEMA's digital flood map (National Flood Hazard Layer, as of Oct 2026), so we print no flood-zone share. An older paper FEMA map may still apply; ask the county floodplain office before you buy.
Are there wetlands in Costilla County?
0.7% of parcels are a quarter or more wetland on the USFWS National Wetlands Inventory, a mapping guide, not a legal delineation.
Are there land prices for Costilla County?
No land-price range is shown for Costilla County yet. We have no sale-price file for Costilla County yet.
Where does this data come from?
Parcels: State of Colorado public parcels (OIT) and county assessor layers. Flood: FEMA National Flood Hazard Layer. Wetlands: USFWS National Wetlands Inventory. Towns: U.S. Census places. Every figure is counted from those files on our map.
Sources & methodSources, dates and how these figures are built
Property tax due dates
Colorado Revised Statutes 39-10-104.5, 39-5-122 and 39-8-106. Checked Oct 13, 2026.
Recorded flood claims in Costilla County
FEMA counts claims on buildings with NFIP flood insurance, so land without an insured building never shows here. Claims counted from 1978 to Sep 2026.
Source: OpenFEMA NFIP Redacted Claims v3, as of Sep 2026.
Land sale prices
We have no sale-price file for this county yet, and Colorado has no statewide sale-price file.
Sources
Parcels: State of Colorado public parcels (OIT) and county assessor layers (2026 roll, county service read Oct 2026); flood: FEMA National Flood Hazard Layer (as of Oct 2026); wetlands: USFWS National Wetlands Inventory (as of Oct 2026); counted on our map built Oct 2026.
This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data.