Osage County
Also known as Osage County, Missouri, Osage County, MO
county in Missouri, United States
Key facts
- Country
- United States
- State
- Missouri
- Founded
- January 29, 1841
- Named after
- Osage River
- Seat
- Linn
- Largest city
- Linn
- Total
- 611 sq mi (1,580 km )
- Land
- 604 sq mi (1,560 km )
- Water
- 6.1 sq mi (16 km ) 1.0%
- Estimate 2025
- 13,611
- Density
- 22.0/sq mi (8.49/km )
- Time zone
- UTC−6 ( Central )
- Summer dst
- UTC−5 ( CDT )
~8 min read
Article
Osage County is a county in the central part of the U.S. state of Missouri. As of the 2020 census, the population was 13,274. Its county seat is Linn. The county was organized January 29, 1841, and named from the Osage River.
Osage County is part of the Jefferson City, Missouri Metropolitan Area. Its geography and the founding of Westphalia Vineyards links it to the Missouri Rhineland, extending along the Missouri River valley to the western edges of the St. Louis Metropolitan Area.