Harrisburg, St. Charles, Kewanee, Pere Marquette, and Chicago house juvenile male offenders while Warrenville house juvenile female offenders. IYC Kewanne is considered a special treatment facility focused on juvenile males with severe mental issues and sex offenders. IYC Pere Marquette is a treatment facility for juvenile males. IYC St. Charles and IYC Harrisburg also house the Receiving and Classification Units, or R&C, for the department. The majority of youths committed to the department from the Chicago area go first to IYC St. Charles while the majority those youths committed to the department from the southern and central part of the state go first to IYC Harrisburg.