Lewis County
Also known as Lewis County, Missouri, Lewis County, MO
county in northeast Missouri, United States
Key facts
- Country
- United States
- State
- Missouri
- Founded
- January 2, 1833
- Named after
- Meriwether Lewis
- Seat
- Monticello
- Largest city
- Canton
- Total
- 511 sq mi (1,320 km )
- Land
- 505 sq mi (1,310 km )
- Water
- 5.8 sq mi (15 km ) 1.1%
- Estimate 2025
- 9,879
- Density
- 19.6/sq mi (7.6/km )
- Time zone
- UTC−6 ( Central )
- Summer dst
- UTC−5 ( CDT )
Article
The Lewis County, Missouri courthouse in Monticello as it appeared in the mid-1870s.
Lewis County is a county located in the northeastern portion of the U.S. state of Missouri. As of the 2020 census, the population was 10,032. Its county seat is Monticello. The county was organized January 2, 1833, and named for Meriwether Lewis, the explorer and Governor of the Louisiana Territory.