- About Camp O
- Summer Camp
- Outdoor Adventure
- Camping & Hiking
Join us to commence our 64th summer of “teaching what matters most.” Families will have a chance to meet leadership staff, take a tour, meet the horses, and participate in a sampling of summer camp activities. Free admission. Free Lunch will be served in the Original Dining Hall from 12:30 PM to 1:30 PM. Please RSVP to the Annual Open House and Homecoming by calling 618-695-2489 or 877-659-2267 x131 or registering online.
Camp Ondessonk has proudly served campers since the summer of 1959. Ondessonk’s 983-acre site is adjacent to the Shawnee National Forest and is among the most beautiful summer camps in the United States. The Ondessonk Experience is deliberately designed to immerse participants in a setting not often encountered by the youths of today. This traditional approach to summer camping allows participants to fully experience their surroundings in a fun, adventurous, and supportive environment.
Camp Ondessonk is owned and operated by the Catholic Diocese of Belleville, Illinois. Christian traditions and teachings guide the work of this ministry. People of all faiths are encouraged and welcome to enjoy the Ondessonk experience.