O-pee-chee Employees Charitable Fund,
Oak Park Co-operative Children's Centre Inc.
Oakridge Presbyterian Church
Oakridge Secondary School Foundation
Oakwood Addiction Counselling Centre Of London
Old Roman Catholic Church In Canada
Ontario Block Parent Program Incorporated
Ontario Canine Spay Neuter Task Force
Ontario Circuit 6a Of Jehovah's Witnesses
Ontario Circuit 6b Of Jehovah's Witnesses
Ontario Conference Of Separated And Divorced Catholics
Ontario Music Educators Association, Inc.
Ontario Percussive Arts Society
Ontario Rehabilitation, Work And Community
Ontario Rett Syndrome Association
Ontario Therapeutic Riding Association
Open Door Christian Fellowship
Operation Walk Canada Inc.
Optimist Club Of Thorndale-youth
Orchard Park Nursery School Inc.