Idaho · FIPS 16049 · County seat: Grangeville
Idaho County, ID GIS & Parcel Viewer
Looking for lot lines or a parcel number in Idaho County, ID? The quickest route is Idaho County Parcel Viewer, the county parcel map we keep on file for this county. We link straight to it and add a few tips for getting around.
Open the Idaho County parcel map ↗
Opens idahocounty.maps.arcgis.com in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | Idaho County Parcel Viewer |
|---|---|
| Type | County-run map |
| Website | idahocounty.maps.arcgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Grangeville |
| Population | 17,890 (2023 Census Bureau estimate) |
| Land area | 8,477 sq mi |
| FIPS code | 16049 |
About the official source
This map is published by or for Idaho 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.
How to use the Idaho County viewer
- Click the button above and wait for the Web AppBuilder viewer to load. Some counties show a terms screen first.
- Search by street address, owner or parcel ID if the search box offers those options.
- Click a lot on the map to read its attributes.
- Turn on aerial imagery from the basemap tool and use the layer list to add things like zoning or flood zones when they're published.
Have a tax bill handy? The parcel or account number on it is usually the fastest way to search.
Idaho County by the numbers
Idaho County had an estimated 17,890 residents in 2023, according to the Census Bureau. With about 8,477 square miles of land, that works out to roughly 2.1 people per square mile. That makes it number 20 out of 44 Idaho counties by population. Its county seat is Grangeville.
Neighboring counties
If the property sits near a county line, the parcel may belong to a neighbor. These counties border Idaho County:
- Adams County
- Clearwater County
- Lemhi County
- Lewis County
- Nez Perce County
- Valley County
- Missoula County, MT
- Ravalli County, MT
- Wallowa County, OR
Maps vs. surveys
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.