| Oke-Igbala Ayo Spiritual Church of Christ Cherubim and Seraphim Kerubu and Serafu | Toronto | $28K |
| O'Keefe Ranch & Interior Heritage Society | Spallumcheen | $1M |
| Okla Community Cemetery Committee | Okla | $1,300 |
| Okotoks Agricultural Society | Foothills | $547K |
| Okotoks Alberta Congregation of Jehovah's Witnesses | Okotoks | $57K |
| Okotoks Alliance Church | Foothills | $866K |
| Okotoks Area Rural Crime Watch Association | Okotoks | $3,695 |
| Okotoks Arts Council | Okotoks | $9,215 |
| Okotoks Branch #291 Royal Canadian Legion Poppy Trust Funds | Okotoks | $86K |
| Okotoks Calvary Fellowship | Okotoks | $0 |
| Okotoks Evangelical Free Church | Okotoks | $1.2M |
| Okotoks Film Society | Okotoks | $54K |
| Okotoks Pastoral Charge | Okotoks | $511K |
| Oksana's Harvest Limited | Keswick Ridge | $36K |
| OKT Ansip Shooniyaa Foundation | Toronto | $87K |
| Oktoecho | Montreal | $274K |
| Okyerema International Foundation | Brampton | $0 |
| OLA Children's Project | Fort Erie | $11K |
| Olam Chesed Yobone Fund | Toronto | $24K |
| Olangi Wosho Foundation - Canada | Ottawa | $127K |
| Old Age Pensioners' of BC Scholarship Society | Pitt Meadows | $1,114 |
| Old Apostolic Lutheran Church of Barrie | Utopia | $12K |
| Old Apostolic Lutheran Church of Sault Ste. Marie Ontario | Sault Ste. Marie | $138K |
| Old Beaver River/Port Maitland Cemeteries Preservation Society | Port Maitland | $1,014 |
| Old Bergthaler Mennonite Church | Hague | $122K |
| Old Brewery Mission Foundation / Fondation Mission Old Brewery | Montreal | $13M |
| Old Burying Ground Foundation | Halifax | $44K |
| Old Calendar Greek Eastern Metroppolia of Gnesion Orthodoxonchristianon of Canada/ la Metropole Canadienne du Gnesion Orthodoxon Christianon de l'Ancien Calendrier Grec Orient | Montreal | $112K |
| Old Cemeteries Society of Victoria | Victoria | $14K |
| Old Clarendon Cemetery | Shawville | — |
| Old Colony Mennonite Church | Neuanlage | $73K |
| Old Colony Mennonite Support (Canada) | Mount Forest | $1,710 |
| Old Durham Road Pioneer Cemetery Committee | Toronto | $737 |
| Old Elm Charitable Trust | Magrath | -$280K |
| Old Farm Cemetery Society | Shag Harbour | $8,078 |
| Old Friends Canada Society | Lake Country | $71K |
| Old Hay Bay United Church | Napanee | $28K |
| Old Holy Trinity Charitable Trust | Middleton | $2,289 |
| Old Hope Society | Parkland County | $18K |
| Old Ladies Home Society | Yarmouth | $4,591 |
| Old Macdonald's Day CARE (kingston) Inc. | Kingston | — |
| Old Millbrook School Family Centre Inc. | Millbrook | $223K |
| Old Order Mennonite Conference | Wallenstein | $11.1M |
| Old Perlican Pastoral Charge | Old Perlican | $75K |
| Old Protestant Cemetery Burial Ground Inc. | Charlottetown | $10K |
| Old Reformed Congregation | Salford | $99K |
| Old ST. Andrew's Presbyterian Church | Colborne | $58K |
| Old ST. John's Stamford Heritage Association Incorporated | Niagara Falls | $20K |
| Old ST. Pauls Anglican Church | Woodstock | $196K |
| Old Strathcona Youth Society | Edmonton | $634K |
| Old Sun Community College | Siksika | $12.1M |
| Old Town Hall Association | Waterford | $194K |
| Old Town Hall Concerts | Goulais River | $0 |
| Old Trout Puppet Workshop Society | Calgary | $673K |
| Older Adult Centre Sudbury/centre des Aines de Sudbury | Sudbury | $524K |
| Older Adult Centres' Association of Ontario | Caledon East | $1.1M |
| Oldman River Antique Equipment and Threshing Club | Pincher Creek | $320K |
| Oldman WaterShed Council | Lethbridge | $945K |
| Olds and Area Pregnancy Support Centre | Olds | $195K |
| Olds and District Kiwanis Music Festival Society | Olds | $36K |
| Olds and District Music Teachers Association | Mountain View County | $5,388 |
| Olds Church of the Nazarene | Olds | $151K |
| Olds College | Olds | $85.2M |
| Olds & District Christmas Angels Society | Olds | $46K |
| Olds & District Hospice Society | Olds | $361K |
| Olds Historical Society | Olds | $60K |
| Olds Koinonia Christian School Society | Olds | $788K |
| Olds Mountain View Christian School Association | Mountain View County | $851K |
| Olds United Church | Olds | $113K |
| O'Leary Church of Christ Inc. | Alberton | $128K |
| O'Leary Church of the Nazarene Inc. | O'Leary | $141K |
| O'Leary Community Health Foundation Inc | O'Leary | $325K |
| O'Leary Community Sports Centre Inc | O'Leary PEI | $325K |
| O'Leary Gospel Hall | Coleman | $87K |
| O'Leary Museum and Library Association LTD | O'Leary | $776K |
| Oleary West Cape Pastoral Charge | O'Leary | $115K |
| Oleg and Friends Inc. | Winnipeg | $8,486 |
| Olha Cemetery Fund LTD. | Olha | $9,256 |
| OLI Foundation | Saint Laurent | — |
| Oliphant Campers' Church | Elmira | $8,789 |
| Olive Branch Mennonite Missions-Canada | Atwood | $137K |
| Olive Branch Ministries | Hamilton | — |
| Olive Branch Playground Builders Foundation | Whistler | $119K |
| Olive Branch Revival Foundation | Victoria | $133K |
| Olive Lionel Memorial Society | Delta | — |
| Olive Tree Foundation | Markham | $47K |
| Olive Tree Projects Society | Spruce Grove | $209K |
| Oliver Alliance Church | Oliver | $408K |
| Oliver and District Heritage Society | Oliver | $264K |
| Oliver Centre-Early Learning Programs for Children & Families Society | Edmonton | $4.9M |
| Oliver Community Arts Council | Oliver | $42K |
| Oliver Congregation of Jehovah's Witnesses Oliver British Columbia | Osoyoos | $67K |
| Oliver Foodbank (2000) | Oliver | $220K |
| Oliver Kiwanis Senior Citizens Housing Society | Oliver | $391K |
| Oliver Lodge | Saskatoon | $13.1M |
| Oliver/ososyoos Search and Rescue Society | Oliver | $151K |
| Oliver Pastoral Charge | Oliver | $50K |
| Oliver Senior Center Society | Oliver | $188K |
| Olive's Animal Sanctuary | North Cowichan | $65K |
| Olives Harvest Church | York | $8,454 |
| Olivet Baptist Church | Mississauga | $100K |
| Olivet Baptist Church | New Westminster | $554K |
| Olivet Baptist Church of Meaford | Meaford | $167K |
| Olivet Baptist Church | Westport | $184K |
| Olivet Church Abbotsford | Abbotsford | $249K |
| Olivet Church of the New Jerusalem | Etobicoke | $4.1M |
| Olivia Baloo's Animal Rescue | Toronto | — |
| Olivia Marshall Private Foundation | Grande Prairie | $34K |
| Olivier-Robert en fête | Montreal | — |
| Ollivett Lighthouse Tabernacle of Ontario | Toronto | $50K |
| Oltumo Maasai Project | Saskatoon | — |
| Olympia Charitable Foundation | Calgary | $593K |
| Olympia's Gift Scholarship Fund | Toronto | — |
| Olympic Heights School Parents Association | Calgary | $19K |
| Olympiques spéciaux Québec | Montreal | $2.7M |
| OM Foundation | Calgary | $139K |
| Om Namo Narayani Amma's Charitable Foundation | Brampton | $2,256 |
| Om Sharavanabhava Seva Foundation of Canada | Markham | $50K |
| Om Shri Shirdi Sai Dwarkamai Dham | Brampton | $209K |
| Omacan | Nobel | $75K |
| Omagh Bible School | Blyth | $17K |
| Omagh Church of Christ | Milton | $69K |
| Omagh Presbyterian Church | Campbellville | $48K |
| O'Mahoney Family Foundation | Oakville | $7,531 |
| Omamiwinini Pimadjwowin | Pikwakanagan | $253K |
| Omar Al-Farooq Islamic Foundation | Vancouver | $18K |
| Omar Ibn Al-Khattab Centre | Edmonton | $6.1M |
| OMB Foundation | Montreal | $1,080 |
| Ombres Folles | Montreal | $338K |
| Omega Church Centre | Brampton | $64K |
| Omega Circle Cemetery Club | Gadsby | $26K |
| Omega Community Resources | Dorval | $1.1M |
| Omega Fire Ministries Edmonton | Edmonton | $0 |
| Omega Fire Ministries of Calgary | Calgary | $117K |
| Omega Fire Ministries Ottawa Inc. | Orleans | $91K |
| Omega Foundation | Toronto | — |
| Omega Ministry Service Centre | Toronto | $406K |
| Omega Storehouse Inc. | Steinback | $89K |
| Omemee Baptist Church | Omemee | $65K |
| Omemee Children's Centre | Omemee | $1.2M |
| Omemee Food Bank | Omemee | $27K |
| Omemee Medical Centre | Omemee | — |
| Omers Foundation | Toronto | — |
| OMI Lacombe Canada Inc. | Ottawa | $7.5M |
| OMI ST Peter's Continuing CARE Foundation | Ottawa | $694K |
| OMID Foundation Canada | North York | $4,040 |
| Omineca Pastoral Charge | Vanderhoof | $105K |
| Omineca Safe Home Society | Vanderhoof | $1.1M |
| Omni Learning Centre | Belleville | $144K |
| Omnibus le corps du théâtre | Montreal | $154K |
| Omofuma Family and Friends Association | Ottawa | $825 |
| Omond Memorial United Church | North Bay | — |
| Ompah Community Volunteer Association | Ompah | — |
| OMRA Shelter Corporation | Ottawa | $241K |
| Oms International - Canada | Burlington | $1.8M |
| Omughisa Rwenzori | Nakusp | $16K |
| Omwaana Ono International | Odessa | $52 |
| On A Mission For The Mission | Windsor | $30K |
| ON a Rock Christian School of Waterloo Region | Winterbourne | $2.8M |
| ON Campus Day CARE Society | Grand Prairie | $1.6M |
| On Community Church of Edmonton | Edmonton | $229K |
| ON Eagle's Wings Ecumenical Ministries Inc. | Edmonton | $217K |
| ON Eagles Wings Ministries Association | Kingston | $8,853 |
| On Guard for Humanity | Toronto | $636 |
| On Hinds'Feet Christian Fellowship | Woodbridge | $19K |
| On Mission Church Canada | Odessa | $65K |
| On Rock Community Services Inc. | Kirkland | $1.9M |
| On roule | Montreal | — |
| On SEXplique ça | Pointe-Aux-Trembles | — |
| ON Site Placement Services Association | Edmonton | $2.4M |
| ON the Edge of Time Ministries | Sherwood Park | $146K |
| On the Front Line Society (Breast Cancer Fund) | Halifax | $358 |
| ON the Ground Society for Documentary Photography | Bowen Island | — |
| ON the Move Incorporated | Winnipeg | $2M |
| On The Rise Foundation | Orleans | $4,939 |
| On the Rock Community Church | Welland | — |
| Onakawana Education Fund | Toronto | $266K |
| Onake Corporation | Akwesasne | $936K |
| Onanole and District Recreation Corporation | Onanole | $353K |
| Onanole Foundation Inc. | Onanole | $34K |
| Onaway Pond Foundation | Gravenhurst | $79K |
| Oncore Seniors Society | Kamloops | $5.3M |
| One Accord Bible Fellowship Baptist Church | Edmonton | $70K |
| One At A Time Rescue Inc. | Virden | $201K |
| One Body Village | Toronto | $118K |
| One by One: The Latin America Project | Guelph | $73K |
| One CARE Home and Community Support Services | Clinton | $14.7M |
| One Child's Village: a Global Orphans Foundation | Calgary | $131K |
| One Church | Halifax | $721K |
| One Church Canada | Barrie | $14K |
| One Church Windsor | Windsor | — |
| One City Community Development Services | Peterborough | $2.7M |
| One City Education Society of Toronto Inc. | Toronto | $166K |
| One Degree Forward Canada Inc. | Victoria | $234K |
| One Diaper Canada | Kanata | $366 |
| One Drop Foundation | Montreal | $4.8M |
| One Eleven Senior Citizens Centre Inc. | Sudbury | $65K |
| One Family Fund Canada | Toronto | $3.7M |
| One Flock One Shepherd Ministries (OFOSM) | Orleans | $187K |
| One for Israel - Canada | Calgary | $934K |