File:Mount_Carroll_courthouse.jpg · Wikimedia Commons · See Wikimedia Commons
Carroll County
Also known as Carroll County, Illinois, Carroll County, IL
county in Illinois, United States
Key facts
- Country
- United States
- State
- Illinois
- Named after
- Charles Carroll
- Seat
- Mount Carroll
- Largest city
- Savanna
- Total
- 466 sq mi (1,210 km )
- Land
- 445 sq mi (1,150 km )
- Water
- 22 sq mi (57 km ) 4.6%
- Estimate 2025
- 15,419
- Density
- 35.3/sq mi (13.6/km )
- Time zone
- UTC−6 ( Central )
- Summer dst
- UTC−5 ( CDT )
- Congressional district
~8 min read
Article
Carroll County is a county located in the U.S. state of Illinois. As of the 2020 census, the population was 15,702. Its county seat is Mount Carroll.
History