Back مقاطعة جيفرسون (كانساس) Arabic Jefferson County, Kansas BAR Джеферсън (окръг, Канзас) Bulgarian জেফারশন কাউন্টি, ক্যানসাস BPY Jefferson Gông (Kansas) CDO Джефферсон (гуо, Канзас) CE Jefferson County (kondado sa Tinipong Bansa, Kansas) CEB Jefferson County (Kansas) Czech Jefferson County, Kansas Welsh Jefferson County (Kansas) German
Jefferson County | |
|---|---|
 Jefferson County Courthouse in Oskaloosa (1971) | |
 Location within the U.S. state of Kansas | |
 Kansas's location within the U.S. | |
| Coordinates: 39°13′N 95°24′W / 39.217°N 95.400°W | |
| Country |  United States |
| State |  Kansas |
| Founded | August 25, 1855 |
| Named for | Thomas Jefferson |
| Seat | Oskaloosa |
| Largest city | Valley Falls |
| Area | |
• Total | 557 sq mi (1,440 km2) |
| • Land | 533 sq mi (1,380 km2) |
| • Water | 24 sq mi (60 km2) 4.3% |
| Population | |
• Total | 18,368 |
• Estimate (2023)[2] | 18,327  |
| • Density | 33/sq mi (13/km2) |
| Time zone | UTC−6 (Central) |
| • Summer (DST) | UTC−5 (CDT) |
| Congressional district | 1st |
| Website | jfcountyks.com |
Jefferson County is a county located in the U.S. state of Kansas. Its county seat and most populous city is Oskaloosa.[3] As of the 2020 census, the county population was 18,368.[1] The county was named after Thomas Jefferson, the 3rd president of the United States.
- ^ a b "QuickFacts; Jefferson County, Kansas; Population, Census, 2020 & 2010". United States Census Bureau. Archived from the original on August 17, 2021. Retrieved August 16, 2021.
- ^ "Annual Estimates of the Resident Population for Counties: April 1, 2020 to July 1, 2023". United States Census Bureau. Retrieved March 24, 2024.
- ^ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.