| School Board | Type | Language | Headquarters | Census Division(s) Served | Number of Elementary Schools | Number of Secondary Schools |
| Algoma District School Board | Public | English | Sault Ste. Marie | Algoma | 39 | 15 |
| Avon Maitland District School Board | Public | English | Seaforth | Huron, Perth | 36 | 9 |
| Bluewater District School Board | Public | English | Chesley | Bruce, Grey | 41 | 11 |
| District School Board of Niagara | Public | English | St. Catharines | Niagara | 96 | 20 |
| District School Board Ontario North East | Public | English | Timmins | Cochrane, Timiskaming | 25 | 9 |
| Durham District School Board | Public | English | Whitby | Durham | 108 | 20 |
| Grand Erie District School Board | Public | English | Brantford | Brant, Haldimand, Norfolk | 60 | 14 |
| Greater Essex County District School Board | Public | English | Windsor | Essex | 59 | 17 |
| Halton District School Board | Public | English | Burlington | Halton | 85 | 19 |
| Hamilton-Wentworth District School Board | Public | English | Hamilton | Hamilton | 95 | 18 |
| Hastings & Prince Edward District School Board | Public | English | Belleville | Hastings, Prince Edward | 46 | 8 |
| James Bay Lowlands Secondary School Board | Public | English | Moosonee | Town of Moosonee | 0 | 1 |
| Kawartha Pine Ridge District School Board | Public | English | Peterborough | Northumberland, Peterborough, Durham (Municipality of Clarington) | 76 | 15 |
| Keewatin-Patricia District School Board | Public | English | Kenora | Kenora | 17 | 6 |
| Lakehead District School Board | Public | English | Thunder Bay | Thunder Bay | 25 | 4 |
| Lambton Kent District School Board | Public | English | Sarnia | Chatham-Kent, Lambton | 54 | 13 |
| Limestone District School Board | Public | English | Kingston | Frontenac, Lennox/Addington | 51 | 11 |
| Moose Factory Island District School Area Board | Public | English | Moose Factory | Town of Moose Factory | 1 | 0 |
| Moosonee District School Area Board | Public | English | Moosonee | Town of Moosonee | 1 | 0 |
| Near North District School Board | Public | English | North Bay | Nipissing, Parry Sound, Muskoka (Northern section) | 35 | 7 |
| Ottawa-Carleton District School Board | Public | English | Ottawa | Ottawa | 117 | 25 |
| Peel District School Board | Public | English | Mississauga | Peel | 202 | 37 |
| Rainbow District School Board | Public | English | Sudbury | Manitoulin, Sudbury | 35 | 10 |
| Rainy River District School Board | Public | English | Fort Frances | Rainy River | 11 | 3 |
| Renfrew County District School Board | Public | English | Pembroke | Renfrew, Nipissing (Southern section) | 23 | 7 |
| Simcoe County District School Board | Public | English | Midhurst | Simcoe | 87 | 17 |
| Superior-Greenstone District School Board | Public | English | Marathon | Thunder Bay (Eastern) | 12 | 5 |
| Thames Valley District School Board | Public | English | London | Elgin, Middlesex, Oxford | 138 | 28 |
| Toronto District School Board | Public | English | Toronto | Toronto | 451 | 102 |
| Trillium Lakelands District School Board | Public | English | Lindsay | Haliburton, Kawartha Lakes, Muskoka | 41 | 7 |
| Upper Canada District School Board | Public | English | Brockville | Lanark, Leeds/Grenville, Prescott/Russell, Stormont/Dundas/Glengarry | 65 | 21 |
| Upper Grand District School Board | Public | English | Guelph | Dufferin, Wellington | 64 | 11 |
| Waterloo Region District School Board | Public | English | Kitchener | Waterloo | 104 | 16 |
| York Region District School Board | Public | English | Aurora | York | 171 | 31 |
| Conseil des écoles publiques de l'Est de l'Ontario | Public | French | Ottawa | Frontenac, Northumberland, Ottawa, Prescott/Russell, Renfrew, Stormont/Dundas/Glengarry | 23 | 11 |
| Conseil scolaire Viamonde | Public | French | North York | Durham, Essex, Halton, Hamilton, Lambton, Niagara, Peel, Simcoe, Toronto, Wellington, Waterloo, York | 31 | 13 |
| Conseil scolaire de district du Grand Nord de l'Ontario | Public | French | Sudbury | Algoma, Sudbury, Thunder Bay | 10 | 8 |
| Conseil scolaire de district du Nord-Est de l'Ontario | Public | French | North Bay | Cochrane, Nipissing, Timiskaming | 7 | 5 |
| Algonquin and Lakeshore Catholic District School Board | Catholic | English | Napanee | Frontenac, Hastings, Lennox/Addington | 36 | 5 |
| Brant Haldimand Norfolk Catholic District School Board | Catholic | English | Brantford | Brant, Haldimand, Norfolk | 30 | 4 |
| Bruce-Grey Catholic District School Board | Catholic | English | Hanover | Bruce, Grey | 11 | 2 |
| Catholic District School Board of Eastern Ontario | Catholic | English | Kemptville | Lanark, Leeds/Grenville, Prescott/Russell, Stormont/Dundas/Glengarry | 31 | 10 |
| Dufferin-Peel Catholic District School Board | Catholic | English | Mississauga | Peel, Dufferin | 120 | 26 |
| Durham Catholic District School Board | Catholic | English | Oshawa | Durham | 39 | 7 |
| Halton Catholic District School Board | Catholic | English | Burlington | Halton | 41 | 8 |
| Hamilton-Wentworth Catholic District School Board | Catholic | English | Hamilton | Hamilton | 50 | 7 |
| Huron Perth Catholic District School Board | Catholic | English | Dublin | Huron, Perth | 16 | 2 |
| Huron-Superior Catholic District School Board | Catholic | English | Sault Ste. Marie | Algoma | 21 | 3 |
| Kenora Catholic District School Board | Catholic | English | Kenora | Kenora | 4 | 1 |
| London District Catholic School Board | Catholic | English | London | Elgin, Middlesex, Oxford | 45 | 9 |
| Niagara Catholic District School Board | Catholic | English | Welland | Niagara | 51 | 8 |
| Nipissing-Parry Sound Catholic District School Board | Catholic | English | North Bay | Nipissing, Parry Sound | 12 | 1 |
| Northeastern Catholic District School Board | Catholic | English | Timmins | Cochrane, Timiskaming | 13 | 1 |
| Northwest Catholic District School Board | Catholic | English | Fort Frances | Rainy River, Kenora (Western) | 6 | 0 |
| Ottawa Catholic School Board | Catholic | English | Ottawa | Ottawa | 67 | 15 |
| Peterborough Victoria Northumberland and Clarington Catholic District School Board | Catholic | English | Peterborough | Kawartha Lakes, Northumberland, Peterborough, Durham (Clarington) | 31 | 6 |
| Renfrew County Catholic District School Board | Catholic | English | Pembroke | Renfrew | 20 | 2 |
| Simcoe Muskoka Catholic District School Board | Catholic | English | Barrie | Muskoka, Simcoe | 44 | 8 |
| St. Clair Catholic District School Board | Catholic | English | Wallaceburg | Chatham-Kent, Lambton | 26 | 2 |
| Sudbury Catholic District School Board | Catholic | English | Sudbury | Sudbury | 19 | 4 |
| Superior North Catholic District School Board | Catholic | English | Terrace Bay | Thunder Bay (Northern & Eastern) | 9 | 0 |
| Thunder Bay Catholic District School Board | Catholic | English | Thunder Bay | Thunder Bay | 18 | 2 |
| Toronto Catholic District School Board | Catholic | English | Toronto | Toronto | 169 | 31 |
| Waterloo Catholic District School Board | Catholic | English | Kitchener | Waterloo | 45 | 6 |
| Wellington Catholic District School Board | Catholic | English | Guelph | Wellington | 17 | 3 |
| Windsor-Essex Catholic District School Board | Catholic | English | Windsor | Essex | 38 | 9 |
| York Catholic District School Board | Catholic | English | Aurora | York | 88 | 15 |
| Conseil des écoles catholiques du Centre-Est | Catholic | French | Ottawa | Frontenac, Hastings, Lanark, Leeds/Grenville, Ottawa, Renfrew | 39 | 11 |
| Conseil scolaire de district catholique Centre-Sud | Catholic | French | Toronto | Brant, Durham, Halton, Hamilton, Niagara, Peel, Peterborough, Simcoe, Toronto, Waterloo, Wellington, York | 43 | 10 |
| Conseil scolaire de district catholique de l'Est ontarien | Catholic | French | L'Orignal | Prescott/Russell, Stormont/Dundas/Glengarry | 29 | 7 |
| Conseil scolaire de district catholique des Aurores boréales | Catholic | French | Thunder Bay | Kenora, Thunder Bay | 9 | 1 |
| Conseil scolaire de district catholique des Grandes Rivières | Catholic | French | Timmins | Cochrane, Timiskaming | 32 | 8 |
| Conseil scolaire de district catholique du Nouvel-Ontario | Catholic | French | Sudbury | Algoma, Manitoulin, Sudbury | 27 | 10 |
| Conseil scolaire de district catholique Franco-Nord | Catholic | French | North Bay | Nipissing | 12 | 3 |
| Conseil scolaire catholique Providence | Catholic | French | Windsor | Chatham-Kent, Essex, Grey, Lambton, Middlesex, Oxford | 23 | 7 |
| Penetanguishene Protestant Separate School Board | Protestant | English | Penetanguishene | Town of Penetanguishene | 1 | 0 |
| Campbell Children's School Authority | Public (Children's Treatment Centre) | English | Oshawa | Durham (Oshawa) | 1 | 0 |
| Niagara Peninsula Children's Centre School Authority | Public (Children's Treatment Centre) | English | St. Catharines | Niagara | 1 | 0 |
| Ottawa Children's Treatment Centre School Authority | Public (Children's Treatment Centre) | English | Ottawa | Ottawa | 1 | 0 |
| Provincial Schools Branch (Ontario Ministry of Education) | Public (Schools for Deaf, blind, deafblind, and/or severely learning disabled students) | English/French | Milton | Brant (Brantford), Halton (Milton), Middlesex (London), Ottawa | 8 | 0 |
| The KidsAbility School Authority | Public (Children's Treatment Centre) | English | Waterloo | Waterloo (Cambridge and Waterloo) | 2 | 0 |
.svg.png){kind=small}
