CHICAGOPEX is an annual philatelic exhibition and stamp show that brings together collectors, dealers, and competitive exhibitors for displays, sales, and educational programming. It takes place at The Westin Chicago Northwest in Itasca, Illinois, and typically features a large dealer bourse, judged exhibits, society meetings, and youth outreach activities. Organized by the Chicago Philatelic Society, the event serves as a major regional gathering for hobbyists and those interested in postal history and stamp collecting.