Free parcel data in Idaho
Yes. Idaho publishes a free statewide parcel layer: Public Idaho Parcels (Idaho Parcel Data Exchange Standard), from State of Idaho (Idaho Geospatial Office statewide parcel framework), data from participating county assessors. Coverage: 13 of 44 counties only: Ada, Bear Lake, Boise, Camas, Gooding, Jerome, Lincoln, Minidoka, Nez Perce, Oneida, Teton, Valley, Washington. All other counties missing. It's a public ArcGIS REST service with no API key or login.
The layer
| Layer | Public Idaho Parcels (Idaho Parcel Data Exchange Standard) |
|---|---|
| Publisher | State of Idaho (Idaho Geospatial Office statewide parcel framework), data from participating county assessors |
| Coverage | 13 of 44 counties only: Ada, Bear Lake, Boise, Camas, Gooding, Jerome, Lincoln, Minidoka, Nez Perce, Oneida, Teton, Valley, Washington. All other counties missing. |
| Data vintage | County UPDATED dates Aug 2024 - Apr 2025 (Minidoka undated); service last modified Apr 2026 |
| Terms | Public; follow the terms of use in the Idaho Parcel Data Exchange Standard; attribution: participating Idaho counties / State of Idaho |
| Fields | parcel number (PARCEL_ID, FP_ID); site address (SITE_ADD); owner (OWNER1) |
| Not published | deed references, plat references |
| REST endpoint | https://services1.arcgis.com/CNPdEkvnGl65jCX8/arcgis/rest/services/Public_Idaho_Parcels_/FeatureServer/7 |
| Last verified | 2026-10-19 with a live point and parcel-number query |
Notes for GIS users
FIPS is 5-digit text ('16001' Ada); County holds the name. FP_ID = '<County>-<PARCEL_ID>' and is unique statewide. Ada County rows have null SITE_ADD/OWNER1 (attributes withheld); other counties populate them. Text fields are space-padded, trim before use. Layer 0 in the same service is centroids (points), use layer 7 for polygons.
How to use it
- QGIS: Layer > Data Source Manager > ArcGIS REST Server, add a connection with the service URL (the endpoint above without the
final
/0), then add the layer. Filter to your area before exporting. - ArcGIS Pro: Add Data > Data From Path, paste the endpoint.
- Direct query: append
/query?geometry=LON,LAT&geometryType=esriGeometryPoint&inSR=4326&spatialRel=esriSpatialRelIntersects&outFields=*&f=geojsonto get the parcel at a point. - CAD: see getting a parcel into AutoCAD or Civil 3D.
Assessor parcel lines are for taxation and are often 5 to 50 ft off the legal boundary. Why.
Basesheet uses this to draw the parcel line on a base plan for any Idaho address, with LiDAR contours, soils, flood zones and wetlands.
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