Crossword clues for Illinois county. 4 letters:OGLEIllinois county.URBANASeat of Champaign County, IllinoisJOLIETSeat of Will County, IllinoisDECATURSeat of Macon County, IllinoisPEORIAIllinois county or its seatDEKALBIllinois city or countySALEMSeat of Marion County in both Illinois and OregonCAIROSeat of Illinois's Alexander CountyKANKAKEEIllinois city that's a county seat
