Pennsylvania · FIPS 42125 · County seat: Washington
Washington County, PA GIS & Parcel Viewer
Washington County, Pennsylvania parcel data lives on General GIS Viewer for Washington County. Open it below in a new tab, then use the short steps on this page to find a property fast.
Open the Washington County parcel map ↗
Opens experience.arcgis.com in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | General GIS Viewer for Washington County |
|---|---|
| Type | County-run map |
| Website | experience.arcgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Washington |
| Population | 210,232 (2023 Census Bureau estimate) |
| Land area | 857 sq mi |
| FIPS code | 42125 |
Who runs this map
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
- Open the link. This viewer is an ArcGIS Experience Builder app, so its layout is custom to the publisher.
- Look for a search box or search widget and type in a street address or parcel ID.
- Click a parcel to see its details in a pop-up or side panel.
- Check the toolbar for a layer list or basemap switcher if you want aerials or other layers.
Have a tax bill handy? The parcel or account number on it is usually the fastest way to search.
Washington County by the numbers
Census Bureau figures put Washington County at about 210,232 people (2023 estimate) on roughly 857 square miles of land, which is about 245 residents per square mile. That makes it number 18 out of 67 Pennsylvania counties by population. Its county seat is Washington.
Counties next to Washington County
If the property sits near a county line, the parcel may belong to a neighbor. These counties border Washington County:
- Allegheny County
- Beaver County
- Fayette County
- Greene County
- Westmoreland County (state list)
- Brooke County, WV
- Hancock County, WV
- Marshall County, WV
- Ohio County, WV
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.