Kansas · FIPS 20091 · County seat: Olathe
Johnson County, KS GIS & Parcel Viewer
Parcel lookups for Johnson County start at Johnson County Online Mapping. This page gives you that official link, notes on how the viewer works, and links to the counties next door.
Open the Johnson County parcel map ↗
Opens maps.jocogov.org in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | Johnson County Online Mapping |
|---|---|
| Type | County-run map |
| Website | maps.jocogov.org |
| Access | May ask you to sign in |
| County seat | Olathe |
| Population | 622,237 (2023 Census Bureau estimate) |
| Land area | 474 sq mi |
| FIPS code | 20091 |
About the official source
Johnson County runs this viewer (directly or through a contracted vendor), which makes it the closest thing to the source for local parcel lines. This site may show a sign-in form first. Look for a guest or public option; if there isn't one, the county office can tell you how to get access.
How to use the Johnson County viewer
- 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.
The county in brief
The U.S. Census Bureau estimated Johnson County's population at 622,237 in 2023, spread over about 474 square miles of land, or roughly 1,313 people per square mile. That makes it the most populous of Kansas's 105 counties. Its county seat is Olathe.
Counties next to Johnson County
Parcels close to the edge of Johnson County can fall in the next county over. Neighboring counties:
- Douglas County
- Franklin County
- Leavenworth County
- Miami County
- Wyandotte County
- Cass County, MO
- Jackson County, MO
Related 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.