Key facts
- Country
- United States
- State
- Kansas
- Founded
- August 25, 1855
- Named after
- Henry Leavenworth
- Seat
- Leavenworth
- Largest city
- Leavenworth
- Total
- 469 sq mi (1,210 km )
- Land
- 463 sq mi (1,200 km )
- Water
- 6.1 sq mi (16 km ) 1.3%
- Estimate 2025
- 84,590
- Density
- 176.8/sq mi (68.3/km )
- Time zone
- UTC−6 ( Central )
- Summer dst
- UTC−5 ( CDT )
Article
Leavenworth County is a county located in the U.S. state of Kansas and is part of the Kansas City metropolitan area. Its county seat and most populous city is Leavenworth. As of the 2020 census, the county population was 81,881. The county was named after Henry Leavenworth, a general in the Indian Wars who established Fort Leavenworth.
History