Illinois Counties

Union County is in the southern tip of Illinois, along the Mississippi to the west. It’s next to Missouri, not too far from Jackson.

Vermilion County sits on the eastern edge of Illinois, right up against the Indiana border. Danville, the county seat, has grit.

Wabash County is a small patch of Illinois, hugging the Wabash River on the state’s southeastern border. Mount Carmel is the county seat here.

Warren County is a small patch of prairie in the western part of the state. The area features a mix of gently rolling farmland and prairie.

Washington County is in southern Illinois and it’s pure heartland. It’s the kind of place where you can hear a train whistle miles away.

Wayne County sits in the southeastern part of Illinois. Fairfield, the county seat, is about as small-town America as you can get.

White County sits in the southeastern corner of Illinois, against the Wabash River. Carmi is the county seat, a town with a lot of history.

Whiteside County stretches along the Mississippi River in northwestern Illinois. Morrison is the county seat, a town with a grand courthouse.

Will County sits on the edge of the Chicago metro area. Joliet is the county seat. This gritty river town is really trying to reinvent itself.

Williamson County sits in southern Illinois, about as far from Chicago as you can get and still be in the state. Marion is the county seat.

Winnebago County sits in northern Illinois, right up against the Wisconsin border. Rockford is the county seat and a highly populated city.

Woodford County stretches along the Illinois River, just east of Peoria. Eureka is the county seat, located in the southwest of the county.