WELCOME TO JERSEY COUNTY
Located to the north of St. Louis on US 67, Jersey County covers over 240,000 acres and is predominately rural. Jerseyville, the county seat, is the largest municipality and offers shopping, restaurants, recreation, and a friendly atmosphere for visitors. Grafton, a tourist town along the river, is the second largest municipality and is located on Illinois 100, part of the National Scenic Byway called The Great River Road. The Mississippi River delineates the southern edge of the county and the Illinois River along much of the western edge. The bluffs of Pere Marquette State Park overlook the confluence of the Mississippi, Illinois, and Missouri Rivers.