Jefferson County Map, Illinois
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Jefferson County, Illinois
Jefferson County sits right in the middle of southern Illinois. Mount Vernon is the county seat. You’ve probably driven through it on I-57. It’s where you start to feel the shift from Midwest to South.
Farming is big, but there’s some industry too. The county has about 40,000 people, give or take. But grain production and other agriculture is definitely number one here.
Rend Lake is in the south, good for fishing if you don’t mind the crowds. You’ll see a lot of Cardinals fans here as it’s closer to St. Louis than Chicago. The oil boom is long gone, but you can still spot some old pump jacks creaking away.
| Category | Details |
|---|---|
| County Name | Jefferson County |
| County Seat | Mount Vernon |
| Population | Approximately 36,500 |
| Cities, Towns, and Communities | Mount Vernon, Woodlawn, Dix, Waltonville, Ina, Bluford, Bonnie, Nason, Belle Rive, Opdyke, Scheller, Texico, and various other unincorporated communities. |
| Interstates and Highways | Interstate 57, Interstate 64, U.S. Highway 37, Illinois Route 15, Illinois Route 37, Illinois Route 142 |
| FIPS Code | 17-081 |
| Total Area (Land and Water) | 584 square miles (land: 571 sq mi, water: 13 sq mi) |
| Adjacent Counties (and Direction) | Marion County (North), Wayne County (Northeast), Hamilton County (Southeast), Franklin County (South), Perry County (Southwest), Washington County (West) |
| Time Zone | Central Time Zone (CT) |
| State | Illinois |
| Coordinates | 38.3047° N, 88.9343° W |
| Etymology | Named after Thomas Jefferson, the third President of the United States |
| Major Landmarks | Cedarhurst Center for the Arts, Jefferson County Historical Village, Rend Lake, Aquatic Zoo Waterpark, Appellate Courthouse Historic District |
| Website | Jefferson County Website |
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