Kansas · FIPS 20087 · County seat: Oskaloosa
Jefferson County, KS GIS & Parcel Viewer
Use this page to reach the official county parcel map for Jefferson County, Kansas. The button below opens the Jefferson County ORKA parcel viewer in a new tab, so you can look up parcels by address, owner or parcel number on the source site itself.
Open the Jefferson County parcel map ↗
Opens kansasgis.org in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | Jefferson County ORKA parcel viewer |
|---|---|
| Type | County-run map |
| Website | kansasgis.org |
| Access | Free, no login (checked Oct 2026) |
| County seat | Oskaloosa |
| Population | 18,327 (2023 Census Bureau estimate) |
| Land area | 533 sq mi |
| FIPS code | 20087 |
About the official source
It is a county-level map: Jefferson 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.
Searching for a parcel, step by step
- Open the link to ORKA, the parcel viewer hosted on kansasgis.org that many Kansas counties share.
- Read and accept the intro or disclaimer page to reach the map.
- Search by owner, street address or parcel ID, or click a lot on the map.
- Open the parcel details to see the appraisal information the county shares.
Many parcel sites expect owner names last name first. If a full name finds nothing, try just the surname.
About Jefferson County
The U.S. Census Bureau estimated Jefferson County's population at 18,327 in 2023, spread over about 533 square miles of land, or roughly 34 people per square mile. By population it ranks 30th of 105 counties in Kansas. Oskaloosa serves as the county seat.
Counties next to Jefferson County
Parcels close to the edge of Jefferson County can fall in the next county over. Neighboring counties:
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.