St. Clair County, Illinois is governed by a 30-member governing board. The current chair, county board is Mark Kern. See all 11 named officeholders and how to reach each office.
Population: 250,708.
Selected officeholders: Chair, County Board: Mark Kern · State's Attorney: James Gomric · Sheriff: Richard Watson · County Clerk: Thomas Holbrook · Clerk of the Circuit Court: Cindi McDonald · Recorder of Deeds: Michael Crockett.