Idaho · FIPS 16087 · County seat: Weiser
Washington County, ID GIS & Parcel Viewer
Looking for lot lines or a parcel number in Washington County, ID? The quickest route is Washington County Parcels, 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 Washington County parcel map ↗
Opens experience.arcgis.com in a new tab. We link out and never embed or copy parcel data.
Quick facts
| Official map | Washington County Parcels |
|---|---|
| Type | County-run map |
| Website | experience.arcgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Weiser |
| Population | 11,425 (2023 Census Bureau estimate) |
| Land area | 1,453 sq mi |
| FIPS code | 16087 |
Where the parcel data comes from
Washington County runs this viewer (directly or through a contracted vendor), which makes it the closest thing to the source for local parcel lines. When we tested the link in October 2026 it opened with no login and no fee.
Searching for a parcel, step by step
- Press the button above; an ArcGIS Experience Builder app opens in a new tab. Accept any splash or disclaimer screen.
- Search by address or parcel ID, or pan to the area.
- Select a parcel to view the information the publisher makes available.
- Explore the app's panels for layers, legends or printing.
If an address search comes up empty, try the parcel number from a tax bill or deed instead, or click the lot on the map.
The county in brief
Census Bureau figures put Washington County at about 11,425 people (2023 estimate) on roughly 1,453 square miles of land, which is about 7.9 residents per square mile. By population it ranks 29th of 44 counties in Idaho. Weiser serves as the county seat.
Neighboring counties
Parcels close to the edge of Washington County can fall in the next county over. Neighboring counties:
Maps vs. surveys
Online parcel lines are drawn for tax and planning use. They can be off by several feet, so use a recorded plat or a licensed surveyor for fences, setbacks or a sale.