Washington · FIPS 53005 · County seat: Prosser
Benton County, WA GIS & Parcel Viewer
Benton County, Washington parcel data lives on Benton County Property Search. Open it below in a new tab, then use the short steps on this page to find a property fast.
Open the Benton County parcel map ↗
Opens propertysearch.co.benton.wa.us in a new tab. We link out and never embed or copy parcel data.
Quick facts
| Official map | Benton County Property Search |
|---|---|
| Type | County-run map |
| Website | propertysearch.co.benton.wa.us |
| Access | Free, no login (checked Oct 2026) |
| County seat | Prosser |
| Population | 215,219 (2023 Census Bureau estimate) |
| Land area | 1,700 sq mi |
| FIPS code | 53005 |
Who runs this map
This map is published by or for Benton County itself, so it reflects the local parcel layer rather than a third-party copy. Our October 2026 check found the map open to the public, with no account or payment needed.
Searching for a parcel, step by step
- Press the button above to open the county's own web map.
- Search for the property or pan and zoom to it.
- Click the lot to bring up what the county publishes about it.
- Look for print or measure tools if you need a quick map or rough size.
Have a tax bill handy? The parcel or account number on it is usually the fastest way to search.
The county in brief
The U.S. Census Bureau estimated Benton County's population at 215,219 in 2023, spread over about 1,700 square miles of land, or roughly 127 people per square mile. By population it ranks 10th of 39 counties in Washington. Its county seat is Prosser.
Counties next to Benton County
Parcels close to the edge of Benton County can fall in the next county over. Neighboring counties:
- Franklin County
- Grant County
- Klickitat County
- Walla Walla County
- Yakima County
- Morrow County, OR
- Umatilla County, OR
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.