Illinois is one of the premier haunted house states in the country, driven by a Chicago metro market that demands — and gets — world-class haunt productions. The city’s suburbs host some of the most elaborate indoor haunted houses in the Midwest, with operators investing heavily in professional set design, acting talent, and special effects to compete in one of the most crowded haunt markets anywhere. Stateville Haunted Prison, running inside a real correctional facility, is among the most iconic haunt experiences in America. Beyond Chicagoland, central and southern Illinois deliver rural farm haunts, corn mazes, and outdoor trail attractions that capture the agricultural heartland Halloween aesthetic. Illinois haunt season opens late September and runs through early November for top productions. Find all haunted houses across Illinois below.