Boone County
Also known as Boone County, Illinois, Boone County, IL
county in Illinois, United States
Key facts
- Country
- United States
- State
- Illinois
- Founded
- March 3, 1836
- Named after
- Daniel Boone
- Seat
- Belvidere
- Largest city
- Belvidere
- Total
- 282.039 sq mi (730.48 km )
- Land
- 280.741 sq mi (727.12 km )
- Water
- 1.298 sq mi (3.36 km )
- Estimate 2025
- 53,568
- Density
- 190.38/sq mi (73.507/km )
- Time zone
- UTC−6 ( Central )
- Summer dst
- UTC−5 ( CDT )
Article
Boone County is a county located in the U.S. state of Illinois. As of the 2020 census, the population was 53,448. Its county seat is Belvidere. Boone County is included in the Rockford, Illinois metropolitan area.
History