Pennsylvania · FIPS 42129 · County seat: Greensburg
Westmoreland County, PA GIS & Parcel Viewer
Use this page to reach the official county parcel map for Westmoreland County, Pennsylvania. The button below opens Westmoreland County GIS Viewer in a new tab, so you can look up parcels by address, owner or parcel number on the source site itself.
Open the Westmoreland County parcel map ↗
Opens gis.westmorelandcountypa.gov in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | Westmoreland County GIS Viewer |
|---|---|
| Type | County-run map |
| Website | gis.westmorelandcountypa.gov |
| Access | Free, no login (checked Oct 2026) |
| County seat | Greensburg |
| Population | 351,163 (2023 Census Bureau estimate) |
| Land area | 1,028 sq mi |
| FIPS code | 42129 |
Where the parcel data comes from
It is a county-level map: Westmoreland County or the company it hires keeps the parcel layer up to date. Our October 2026 check found the map open to the public, with no account or payment needed.
Finding a property on this map
- Open the official link in a new tab.
- Accept any disclaimer, then look for a search box that takes street addresses, owners or parcel IDs.
- Zoom in and click a parcel to see its details.
- Use the map's layer controls to add aerials or other layers if they're offered.
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.
About Westmoreland County
The U.S. Census Bureau estimated Westmoreland County's population at 351,163 in 2023, spread over about 1,028 square miles of land, or roughly 342 people per square mile. Among Pennsylvania's 67 counties, it is the 11th largest by population. Its county seat is Greensburg.
Counties next to Westmoreland County
Parcels close to the edge of Westmoreland County can fall in the next county over. Neighboring counties:
- Allegheny County
- Armstrong County
- Butler County
- Cambria County
- Fayette County
- Indiana County
- Somerset County
- Washington County
Maps vs. surveys
Treat the map as a guide, not a boundary survey: parcel outlines are often shifted a bit from the real corners. A licensed surveyor settles exact lines.