Randolph County is located in the southwestern part of Illinois and is part of the St. Louis Metropolitan Statistical Area. The county seat is Chester. The county was organized in 1795.

The county government is composed of a board of commissioners, elected from single-member districts, and a county executive. The county executive is elected county-wide.

The county is divided into 18 townships, which provide local services.

The county is served by two public school districts, Chester Community Unit School District 139 and Sparta Community Unit School District 140.

The county is also served by several private schools, including Chester High School, St. Mary's Catholic School, and Sparta Christian Academy.

The county is served by several public libraries, including the Chester Public Library, the Sparta Public Library, and the Randolph County Public Library.

For the most up-to-date and in-depth information, please check the public records links below.