Greene County was established in 1821, three years after Illinois became a state, being carved out of what was previously Madison and St. Clair counties. Over the course of the next 18 years four more counties were formed out of what was once Greene County. These include Scott, Morgan, Macoupin and Jersey counties. This left Greene County with approximately 546 square miles of land located in western-central Illinois near the Illinois River, which was an important resource that provided both a means for travel and to ship goods.
Greene County gets its name from General Nathanael Greene, a hero of the American Revolutionary War.
The county seat of Carrollton, Illinois is home to the Greene County Courthouse located at 519 N Main St.
Townships of Greene County include:
- Athensville
- Bluffdale
- Carrollton
- Kane
- Linder
- Patterson
- Rockbridge
- Roodhouse
- Rubicon
- Walkerville
- White Hall
- Woodville
- Wrights
