List of all cities and towns in Jefferson County
Jefferson County is a county in the U.S. state of Illinois.
It is in the southern part of the state. The 2020 census says that there are 37,113 people living there.
Mount Vernon is the county seat.
The Mount Vernon, Illinois micropolitan area is in Jefferson County. It is in the area called “Little Egypt” by the people who live there.
The Greater St. Louis consolidated urban statistical area, the Metro-East region, and the St. Louis commuter region, market, and viewing area all touch the western edge of the county.
The U.S. Census Bureau says that the county covers 584 square miles (1,510 km2), of which 571 square miles (1,480 km2) are land and 13 square miles (34 km2) are water, or 2.2%.
Here is a list of cities, towns, places, and villages in Jefferson County, Illinois: