Greene County
Sign in to savecounty in Illinois, United States
Key facts
- Country
- United States
- State
- Illinois
- Named after
- Nathanael Greene
- Seat
- Carrollton
- Largest city
- Carrollton
- Total
- 546 sq mi (1,410 km )
- Land
- 543 sq mi (1,410 km )
- Water
- 3.3 sq mi (8.5 km ) 0.6%
- Estimate 2025
- 11,313
- Density
- 22.1/sq mi (8.52/km )
- Time zone
- UTC−6 ( Central )
- Summer dst
- UTC−5 ( CDT )
- Congressional district
- 15th
via Wikipedia infobox
Article
Greene County is a county located in the U.S. state of Illinois. According to the 2020 United States census, it has a population of 11,843. Its county seat is Carrollton.
A notable archaeological area, the Koster Site, has produced evidence of more than 7,000 years of human habitation. Artifacts from the site are displayed at the Center for American Archeology in Kampsville, Illinois.