Marion County is located in the south-central region of Illinois. The county seat is Salem. The county was established in 1823.

The county government is made up of a board of commissioners, which is responsible for setting policy and overseeing the county's budget. The board is composed of seven members, each elected from a different district. The county also has a sheriff, treasurer, assessor, and other elected officials.

The county is part of the Centralia, IL Micropolitan Statistical Area. The economy of Marion County is largely based on agriculture, with corn, soybeans, and wheat being the primary crops. Other industries include manufacturing, retail, and tourism.

The county is served by several school districts, including Centralia City Schools, Salem Community Unit School District, and Sandoval Community Unit School District. The county also has several higher education institutions, including Kaskaskia College, Rend Lake College, and Southern Illinois University Carbondale.

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