Oasis Addiction Recovery Society
Off Centre Music Series
One World Ltd.
Ontario Association Of Children's Rehabilitation Services
Ontario Community Council On Impaired Driving (occid) Inc.
Ontario March Of Dimes Non-profit Housing Corporation
Ontario Paraplegic Foundation
Ontario Psychogeriatric Association
Open Heaven Ministries Inc
Operation Christmas Tree Inc.
Operation Economic Concern
Operation Involvement
Or Hamaarav Sephardic Congregation
Orphan's Hope
Our Lady's Missionaries