Eligibility for membership in OCCCIO is defined by publicly funded institutions conducting College business in Ontario, and having paid their OCCCIO membership fees. Membership is by institution.

Algonquin College
1385 Woodroffe Ave. Ottawa ON K2G 1V8
Cambrian College
1400 Barrydowne Rd. Sudbury ON P3A 3V8
Canadore College of Applied Arts
100 College Dr. North Bay ON P1B 8K9
Centennial College of Applied Arts and Technology
P.O. Box 631, Station A Toronto ON M1K 5E9
College Boreal
21 Lasalle Blvd. Sudbury ON P3A 6B1
Conestoga College
299 Doon Valley Drive Kitchener ON N2G 4M4
Confederation College
PO Box 398, 1450 Nakina Drive Thunder Bay ON P7C 4W1
Durham College
2000 Simcoe St. N. Oshawa ON L1G 0C5
Fanshawe College
1460 Oxford Street E., P.O. Box 7005 London ON N5Y 5R6
Fleming College
599 Brealey Drive Peterborough ON K9J 7B1
George Brown College
PO Box 1015 Station B Toronto ON M5T 2T9
Georgian College
1 College Dr Barrie ON L4M 3X9
Humber Institute of Technology & Advanced Learning
205 Humber College Blvd Etobicoke ON M9W 5L7
Lambton College
1457 London Rd. Sarnia ON N7S 6K4
La Cité Collégiale
801 Aviation Parkway Ottawa ON K1K 4R3
Loyalist College
PO Box 4200 Belleville ON K8N 5B9
Mohawk College of Applied Arts
Fennell Ave & West 5th, PO Box 2034 Hamilton ON L8N 3T2
Niagara College
300 Woodlawn Rd., PO Box 1005 Welland ON L3C 7L3
Northern College
PO Box 3211 Timmins ON P4N 8R6
Sault College of Applied Arts
PO Box 60, 443 Northern Ave Sault Ste. Marie ON P6A 5L3
Seneca College
1750 Finch Ave. E. North York ON M2J 2X5
Sheridan College
1430 Trafalgar Road Oakville ON L6H 2L1
St. Clair College
2000 Talbot Rd W. Windsor ON N9A 6S4
St. Lawrence College
100 Portsmouth Ave Kingston ON K7L 5A6