Washington · FIPS 53033 · County seat: Seattle
King County, WA GIS & Parcel Viewer
King County, Washington parcel data lives on King County Parcel Viewer. Open it below in a new tab, then use the short steps on this page to find a property fast.
Open the King County parcel map ↗
Opens gismaps.kingcounty.gov in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | King County Parcel Viewer |
|---|---|
| Type | County-run map |
| Website | gismaps.kingcounty.gov |
| Access | Free, no login (checked Oct 2026) |
| County seat | Seattle |
| Population | 2,271,380 (2023 Census Bureau estimate) |
| Land area | 2,115 sq mi |
| FIPS code | 53033 |
Where the parcel data comes from
King County runs this viewer (directly or through a contracted vendor), which makes it the closest thing to the source for local parcel lines. Our October 2026 check found the map open to the public, with no account or payment needed.
Searching for a parcel, step by step
- 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.
King County by the numbers
Census Bureau figures put King County at about 2,271,380 people (2023 estimate) on roughly 2,115 square miles of land, which is about 1,074 residents per square mile. That makes it the most populous of Washington's 39 counties. Seattle serves as the county seat.
Nearby parcel maps
Parcels close to the edge of King County can fall in the next county over. Neighboring counties:
Our longer guides
Before you rely on the lines
The lines you see online are approximate. They're good for finding a lot and its parcel number, but a legal boundary question needs the recorded plat or a surveyor.