| Capital: | Oskaloosa |
|---|---|
| Origen y Formación del condado: | One of the original 36 counties |
| Población: | 18,945 habitantes |
| Área: | 536 sq mi |
| Localización del condado dentro de Kansas: |
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Localidades en Jefferson, Kansas
- Grantville
- Kaw Township Jefferson County
- Kentucky Township Jefferson County
- Mclouth
- Meriden
- Nortonville
- Norton Township Jefferson County
- Oskaloosa
- Ozawkie
- Perry
- Rural Township Jefferson County
- Sarcoxie Township Jefferson County
- Union Township Jefferson County
- Valley Falls
- Winchester