| Orangeville Christadelphians | Bolton | — |
| Orangeville Christian Fellowship | Orangeville | $583K |
| Orangeville Christian Reformed Church | Orangeville | $283K |
| Orangeville Christian School Society | Orangeville | $632K |
| Orangeville & District Senior Citizens Club | Orangeville | $470K |
| Orangeville Food Bank : Caring for the Community | Orangeville | $1.3M |
| Orangeville Pastoral Charge | Orangeville | $499K |
| Orangeville Rotary Club Foundation | Fergus | $4,975 |
| Orangutan Foundation International Canada | Vancouver | $170K |
| Oraynu Congregation for Humanistic Judaism | Toronto | $389K |
| Orban Balazs Society Charitable Welfare Trust | Oshawa | $97K |
| Orbicom: Réseau des chaires Unesco en communication | Montreal | $4,313 |
| Orbis Canada Foundation | Toronto | $1.6M |
| Orchard City Abbeyfield Society | Armstrong | $60K |
| Orchard Creek Fellowship Brethren in Christ Church | Thorold | $86K |
| Orchard Ministries Inc. | Blind River | $46K |
| Orchard Park Congregation of Jehovah's Witnesses London Ontario | London | $94K |
| Orchard Park Nursery School Inc. | London | $154K |
| Orchard Valley Pastoral Charge | New Minas | $669K |
| Orchard Valley Senior Housing Society | Kelowna | $1.1M |
| Orchard View Baptist Church | Trenton | — |
| Orchard View Foundation Inc. | Gagetown | — |
| Orchestra Kingston Incorporated | Kingston | $76K |
| Orchestra of the Americas Group (Canada) | Calgary | $2,094 |
| Orchestra Toronto | Toronto | $329K |
| Orchestras Canada/orchestres Canada | Peterborough | $577K |
| Orchestras Mississauga | Mississauga | $779K |
| Orchestre à cordes de Baie-Comeau | Baie-Comeau | $31K |
| Orchestre Classique de Montréal | Montreal | $1.5M |
| Orchestre Classique de Terrebonne | Terrebonne | $52K |
| Orchestre de chambre Nouvelle Génération | Montréal | $19K |
| Orchestre de la francophonie canadienne | Montreal | $485K |
| Orchestre de Saint-Donat | Notre-Dame-De-La-Merci | $11K |
| Orchestre des jeunes du mont-Royal Mount-Royal Youth Orchestra | Montreal | $303K |
| Orchestre des Jeunes du Quebec Maritime | Rimouski | $38K |
| Orchestre des jeunes du Saguenay-Lac-Saint-Jean | Chicoutimi | — |
| Orchestre d'harmonie de Montréal-Nord | Montreal-Nord | — |
| Orchestre Métropolitain | Montreal | $10.6M |
| Orchestre National de Jazz | Outremont | $368K |
| Orchestre Philharmonique de la Relève du Québec | Quebec | $115K |
| Orchestre philharmonique des musiciens de Montréal OPMEN | Montréal | — |
| Orchestre Pop de Trois-Rivières | Trois-Rivieres | $9,504 |
| Orchestre Renaissance de Longueuil | Longueuil | — |
| Orchestre Symphonique de Drummondville | Drummondville | $953K |
| Orchestre Symphonique de l'Agora | Montreal | $1.2M |
| Orchestre Symphonique de l'Estuaire du ST-Laurent | Rimouski | $514K |
| Orchestre Symphonique de Levis | Lévis | $190K |
| Orchestre Symphonique de L'Isle | Montreal | $49K |
| Orchestre Symphonique de Longueuil | Saint-Bruno | $2.3M |
| Orchestre Symphonique de Montreal/montreal Symphony Orchestra | Montreal | $38.3M |
| Orchestre Symphonique de Sherbrooke | Sherbrooke | $1.3M |
| Orchestre Symphonique des Jeunes de l'Outaouais | Gatineau | $31K |
| Orchestre Symphonique des Jeunes de Montréal | Montréal | $196K |
| Orchestre Symphonique des jeunes du West Island | Pointe-Claire | $63K |
| Orchestre Symphonique des Musiciens et Musiciennes du Monde de Montréal | Cote Sainte-Luc | $13K |
| Orchestre Symphonique du Saguenay-Lac ST-Jean Inc. | Chicoutimi | $848K |
| Orchid Species Preservation Foundation | Edmonton | $78K |
| Orde Day CARE Centre | Toronto | $3.4M |
| Order of Malta-Canada/Ordre de Malte-Canada | Ottawa | $1.3M |
| Order of ST. Augustine (province of ST. Joseph) | King City | — |
| Order of ST. Clare | Mission | $412K |
| Order of ST John Palliative CARE Foundation | Vancouver | $441K |
| Order of the Holy Sepulchre for Canada - Atlantic | Antigonish | $34K |
| Order of the Oblates of Mary Immaculate in the Province of B C ST Paul's Province | Ottawa | $4M |
| Ordre Bouddhique Tu Quang Inc. | Montreal | $148K |
| Ordre de la Tres-Sainte-Trinite (les Trinitaires) | ST Bruno | $4M |
| Ordre de Saint-Antoine Le Grand | Outremont | $743K |
| Ordre des Dominicains ou Frères prêcheur au Canada | Montreal | $3.7M |
| Ordre des Ingénieurs du Québec Foundation | Montréal | $500K |
| Ordre Equestre du Saint Sepulcre de Jerusalem Lieutenance de Quebec | Québec | — |
| Ordre Equestre du Saint Sepulcre de Jerusalem-Lieutenance du Canada - Montreal | Montreal | $232K |
| Ordre Franciscain Seculier Inc. | La Prairie | $5,178 |
| Orford Musique / Orford Music | Orford | $4.4M |
| Orfund Foundation | Toronto | $8,832 |
| Organ Donation and Transplant Research Foundation of British Columbia | Vancouver | $59K |
| Organisation agricole de solidarité urbaine et rurale | Verdun | — |
| Organisation caritative mains tendues / Extended Hands Charitable Organization | Lachine | $82K |
| Organisation Catholique Canadienne pour le Développement et la Paix | Montreal | $19.5M |
| Organisation Chabad of Downtown Montreal Organisation Chabad de Centre Ville Montréal | Montreal | $662K |
| Organisation CHABAD Westmount / Westmount CHABAD Organization | Westmount | $8.4M |
| Organisation Communautaire J'Aime Ma Ville / I Love My City Community Organization | Montreal | $156K |
| Organisation Communications et Societe Ocs Inc. | Montreal | $886K |
| Organisation d'Aide aux Sans-Emploi (o.d.a.s.- Montreal) | Montreal | $103K |
| Organisation d'aide en santé pour la protection et la promotion des femmes et enfants victimes des violences sexuelles en milieu rural (OSAMIPE) | Quebec | — |
| Organisation de l'Union Haitienne | Chomedey Laval | — |
| Organisation d'éducation et information logement de Côte-des-neiges | Montreal | $544K |
| Organisation des Enfants de Saturne | Laval | $6,117 |
| Organisation des Enfants du Futur | Longueuil | — |
| Organisation des Villes du Patrimoine Mondial | Quebec | $911K |
| Organisation humanitaire Ihsanhouse | Montreal | $554K |
| Organisation Je suis Heshima / I am Heshima Organization | Hemmingford | $104K |
| Organisation Montréalaise de la mosquée Noor-E-Madina | Montreal | $128K |
| Organisation Populaire des Droits Sociaux de Valleyfield | Salaberry-De-Valleyfield | $101K |
| Organisation Populaire des Droits Sociaux (opds) | Montreal | $302K |
| Organisation pour la Promotion de l'éducation la santé et le soulagement de la pauvreté des enfants d'Haiti (PESSPE) | Ottawa | — |
| Organisation pour la Sante Mentale Oeuvrant a la Sensibilisation et a l'Entraide (o S M O S E ) | Quebec | $244K |
| Organisation pour le développement avec des nouvelles solidarités au Canada (ODNS) | Lions Bay | $5,749 |
| Organisation Québécoise de Soutien aux Enfants et aux Familles (OQSEF) | Laval | $18K |
| Organisation Québécoise des Personnes Atteintes du Cancer (1984) Inc. | Quebec | $347K |
| Organisation Spirituelle Mondiale des Brahma Kumaris | Montreal | $139K |
| Organisation Tête Ensemble | Gatineau | $5,373 |
| Organisation Universitaire Interamericaine | Montreal | $1.5M |
| Organisme Action Urgence | Magog | $12K |
| Organisme Benoit Duchesne pour l'aide au maintien a domocile des personnes victimes du syndrome de verrouillage | Shawinigan | $1,256 |
| Organisme Communautaire | Fortierville | $288K |
| Organisme communautaire famille l'Embellie | L'Etang-du-Nord | $258K |
| Organisme d'aide animale espoir câlin MRC Rocher-Percé | Grande-Riviere-Ouest | $501K |
| Organisme de Bassin Versant de la Yamaska | Granby | $1.4M |
| Organisme de Bassin Versant Lac-Saint-Jean | Normandin | $392K |
| Organisme de bassins versants de Kamouraska L'Islet et Rivière-du-Loup | Saint-Pascal | $418K |
| Organisme de Justice Alternative Volteface | Shawinigan | $386K |
| Organisme de Recuperation Alimentaire et de Services ST-Eusebe | Princeville | $261K |
| Organisme de Recuperation Anti-Pauvrete de l'Erable | Plessisville | $1M |
| Organisme d'Entraide D.m.a. | Beauport | $44K |
| Organisme Du Fjord au Lac | Laterriere | $633 |
| Organisme Gaspésien des personnes atteintes de cancer inc. | Maria | $338K |
| Organisme Multus | Marbleton | $220K |
| Organisme pour l'intégration sociale Apprenti-Loisirs | Quebec | $97K |
| Organisme Renaissance Autochtone | Quebec | — |
| Organisme Voué aux Personnes Atteintes de Cancer (OVPAC) | Salaberry-De-Valleyfield | $437K |
| Organization Advocating Sanctuary for Endangered Species | Brentwood Bay | — |
| Organization for Assistance and Social Intervention Se rvices O.A.S.I.S. | Montréal | $15K |
| Organization for Islamic Learning | Concord | $71K |
| Organization for Literacy in Lambton | Sarnia | $209K |
| Organization for Relief & Development of Afghanistan | Ottawa | $634 |
| Organization for Rwandan Youth at Risk | Oxford Station | — |
| Organization for the Advancement of Islamic Knowledge and Humanitarian Services (o.a.i.k. & H.s.)/organisation pour l'Avancement des Connaissances Islamiques et Services Human | Montreal | $50 |
| Organization for the Development of Artists (connexion) | Fredericton | — |
| Organization of Saskatchewan Arts Councils | Regina | $1.6M |
| Organized Kaos Life and Trade | Paris | $634K |
| Orgometa Laboratories | London | — |
| Orgyen Khamdroling Canada | Sainte-Anne-De-Bellevue | $84K |
| Oriana Singers | Cobourg | $82K |
| Orient Middle-East Immigrant Aid Society of Canada | Montreal | $56K |
| Orientation: Jeunesse de la Haute-Yamaska | Granby | — |
| Orientation Vie Inc | Montreal | — |
| Origin Church | Vancouver | $332K |
| Original Kids Theatre | London | $1.2M |
| Origine création | Mascouche | — |
| Orignal tatoué café de rue | Joliette | $364K |
| Orillia Alliance Church of the Christian and Missionary Alliance in Canada | Orillia | $178K |
| Orillia and District Literacy Council Incorporated | Orillia | $141K |
| Orillia Baptist Church | Orillia | $90K |
| Orillia Canada Day Inc. | Orillia | — |
| Orillia Central Preschool | Orillia | $3.8M |
| Orillia Christian Centre | Orillia | $5.3M |
| Orillia Christian School Society | Orillia | $1.1M |
| Orillia Community Church | Orillia | $264K |
| Orillia Concert Band | Orillia | $48K |
| Orillia & District Arts Council | Orillia | $143K |
| Orillia Heritage Centre | Orillia | $25K |
| Orillia Legion Branch 34 Senior Citizens Complex | Orillia | $1.1M |
| Orillia Native Women's Group | Orillia | $633K |
| Orillia Naturalists' Club Incorporated | Orillia | $5,226 |
| Orillia Pregnancy Crisis Center | Orillia | $68K |
| Orillia Presbyterian Church | Orillia | $380K |
| Orillia Senior Citizens (the Intelligent Elders): Tie | Orillia | $49K |
| Orillia Silver Band | Orillia | $27K |
| Orillia Soldiers' Memorial Hospital | Orillia | $200.5M |
| Orillia Soldiers' Memorial Hospital Foundation | Orillia | $5M |
| Orillia Star of Hope Spiritualist Church | Orillia | $9,815 |
| Orillia Vocal Ensemble | Barrie | $31K |
| Oriole Charitable Foundation | Canmore | $14.4M |
| Oriole Nursery School | Toronto | $33K |
| Oriole Parkway Congregation of Jehovah's Witnesses Toronto Ontario | Toronto | $390K |
| Orion Evangelical Free Church | Orion | $111K |
| Orion Foundation of Calgary | Millarville | $20K |
| OrKidstra - Sistema Ottawa | Ottawa | $1.2M |
| Orkney Historical Society | Yorkton | $7,456 |
| Orkney Presbyterian Church | Three Hills | — |
| Orlan Ukrainian Folk Ensemble Inc. | Winnipeg | $20K |
| Orleans Congregation of Jehovah's Witnesses Ottawa Ontario | Orleans | $112K |
| Orleans Cooperative Nursery School/ the Orleans Preschool Inc. | Ottawa | — |
| Orleans- Cumberland Community Resource Centre Centre de Ressources Communautaires Orleans-Cumberland | Orleans | $2.8M |
| Orleans United Church | Orleans | $564K |
| Orlo Challice Scholarship Trust Fund | Sault-Ste-Marie | — |
| Ormiston Baptist Church Inc. | Kayville | $12K |
| Ormond Protestant Cemetery | Winchester | $10K |
| Ormstown Union Cemetery Company | Hinchinbrooke | $14K |
| Ornaments of Grace & Virtue International | Mississauga | $62K |
| Ornge | Mississauga | $316.7M |
| Ornge Foundation | Mississauga | — |
| Oro-Medonte Horticultural Society | Oro-Medonte | $12K |
| Oromo Evangelical Church of Calgary | Calgary | $611K |
| Oromo Evangelical Church of Manitoba Inc. | Winnipeg | $158K |
| Oromo Evangelical Church of Ottawa Inc. | Nepean | $33K |
| Oromo Evangelical Church of Toronto | Scarborough | $237K |
| Oromo Gospel Church of Halifax | Halifax | $32K |
| Oromo Relief Association in Ontario | North York | $32K |
| Oromocto & Area SPCA Inc. | Oromocto | $661K |
| Oromocto Community Residences Incorporated | Oromocto | $993K |
| Oromocto Congregation of Jehovah's Witnesses Oromocto New Brunswick | Hanwell | $29K |
| Oromocto Pastoral Charge | Oromocto | $143K |
| Oromocto Pioneer Gardens Cemetery Company Inc. | Oromocto | $102K |
| Oromocto Public Hospital Foundation Inc | Oromocto | $100K |
| Oromocto Public Library | Oromocto | $7,362 |
| Oromocto Training & Employment Centre Inc. | Oromocto | $1.4M |
| Oromocto United Baptist Church | Oromocto | $539K |
| Oromocto Watershed Association Inc. | French Lake | $212K |
| Orono Amateur Athletic Association | Orono | $529K |