San Juan County land: flood and parcels
2,780 parcels
7.8% of San Juan County’s 2,780 parcels are in a FEMA flood zone.
County roll 2026 · Map data Oct 26, 2026
- Acres on the roll25,016
- In a FEMA flood zone7.8%special flood hazard area
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
Towns in San Juan County
- Silverton948 parcels
Flood zones and wetlands
Recorded flood claims in San Juan County
Fewer than 10 insured flood claims were recorded in San Juan County since 1978.
Land in San Juan County by useLand use on the county roll
| Land class | Parcels | Share |
|---|---|---|
| Other or not coded | 1,782 | 64% |
| Building on record | 927 | 33% |
| Institutional | 70 | 2.5% |
| Farm and timber | 1 | under 0.1% |
1 farm and timber parcels cover 5 acres. County tax roll 2026 (county file Apr 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 San Juan County is 3.44 acres (2,290 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 San Juan 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 San Juan County landAnswers from the public records
How many parcels are in San Juan County, CO?
2,780 parcels on the 2026 San Juan County tax roll (county file Apr 2026), covering 25,016 acres.
How much vacant land is in San Juan County, CO?
San Juan County's vacant-land class failed our aerial check (24 of 60 sampled lots were in use or doubtful: in-town yards, parking, a building, storage and equipment yards), so we don't call any parcel here vacant land.
What is the typical lot size in San Juan County?
The median parcel is 3.44 acres, from 2,290 parcels with a recorded size.
How much of San Juan County is in a flood zone?
7.8% of parcels are in a FEMA special flood hazard area (National Flood Hazard Layer, as of Oct 2026). Check each parcel's own flood line before you buy.
Are there wetlands in San Juan County?
3.5% 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 San Juan County?
No land-price range is shown for San Juan County yet. We print no land-price range for San Juan 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 San Juan 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 hold this county's recorded deeds, but its file does not mark which sales are arm's-length land sales, so this page prints no land price range yet.
Sources
Parcels: State of Colorado public parcels (OIT) and county assessor layers (2026 roll, county file Apr 2026); flood: FEMA National Flood Hazard Layer (as of Oct 2026); wetlands: USFWS National Wetlands Inventory (as of Oct 2026); sales: the county's own file, through Dec 2025; 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.