List of school districts in Ontario
This is a list of school districts in Ontario.
There are 76 public school boards in Ontario, including 38 public secular boards, 38 public separate boards, and 7 public school authorities that operate in children's treatment centres.
School Boards
| School Board | Type | Language | Headquarters | Census Division Served | Number of Elementary and Intermediate Schools | Number of Secondary Schools |
| Algoma District School Board | Public | English | Sault Ste. Marie | Algoma | 41 | 12 |
| Avon Maitland District School Board | Public | English | Seaforth | Huron, Perth | 38 | 10 |
| Bluewater District School Board | Public | English | Chesley | Bruce, Grey | 42 | 11 |
| District School Board of Niagara | Public | English | St. Catharines | Niagara | 90 | 20 |
| District School Board Ontario North East | Public | English | Timmins | Cochrane, Timiskaming | 26 | 11 |
| Durham District School Board | Public | English | Whitby | Durham | 107 | 20 |
| Grand Erie District School Board | Public | English | Brantford | Brant, Haldimand, Norfolk | 59 | 14 |
| Greater Essex County District School Board | Public | English | Windsor | Essex | 59 | 17 |
| Halton District School Board | Public | English | Burlington | Halton | 85 | 17 |
| Hamilton-Wentworth District School Board | Public | English | Hamilton | Hamilton | 95 | 21 |
| Hastings & Prince Edward District School Board | Public | English | Belleville | Hastings, Prince Edward | 40 | 9 |
| 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 | 73 | 16 |
| Keewatin-Patricia District School Board | Public | English | Kenora | Kenora | 17 | 6 |
| Lakehead District School Board | Public | English | Thunder Bay | Thunder Bay | 26 | 5 |
| Lambton Kent District School Board | Public | English | Sarnia | Chatham-Kent, Lambton | 55 | 13 |
| Limestone District School Board | Public | English | Kingston | Frontenac, Lennox/Addington | 53 | 12 |
| 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 | 36 | 8 |
| Ottawa-Carleton District School Board | Public | English | Ottawa | Ottawa | 118 | 31 |
| Peel District School Board | Public | English | Mississauga | Peel | 213 | 42 |
| Rainbow District School Board | Public | English | Sudbury | Manitoulin, Sudbury | 38 | 11 |
| Rainy River District School Board | Public | English | Fort Frances | Rainy River | 11 | 3 |
| Renfrew County District School Board | Public | English | Pembroke | Renfrew, Nipissing | 25 | 9 |
| Simcoe County District School Board | Public | English | Midhurst | Simcoe | 87 | 23 |
| Superior-Greenstone District School Board | Public | English | Marathon | Thunder Bay | 12 | 5 |
| Thames Valley District School Board | Public | English | London | Elgin, Middlesex, Oxford | 133 | 30 |
| Toronto District School Board | Public | English | Toronto | Toronto | 477 | 123 |
| Trillium Lakelands District School Board | Public | English | Lindsay | Haliburton, Kawartha Lakes, Muskoka | 40 | 8 |
| Upper Canada District School Board | Public | English | Brockville | Lanark, Leeds/Grenville, Prescott/Russell, Stormont/Dundas/Glengarry | 83 | 24 |
| Upper Grand District School Board | Public | English | Guelph | Dufferin, Wellington | 66 | 14 |
| Waterloo Region District School Board | Public | English | Kitchener | Waterloo | 103 | 17 |
| York Region District School Board | Public | English | Aurora | York | 175 | 33 |
| Conseil des écoles publiques de l'Est de l'Ontario | Public | French | Ottawa | Frontenac, Northumberland, Ottawa, Prescott/Russell, Renfrew, Stormont/Dundas/Glengarry | 32 | 14 |
| Conseil scolaire Viamonde | Public | French | Toronto | Durham, Essex, Halton, Hamilton, Lambton, Niagara, Peel, Simcoe, Toronto, Wellington, Waterloo, York | 47 | 14 |
| Conseil scolaire de district du Grand Nord de l'Ontario | Public | French | Sudbury | Algoma, Sudbury, Thunder Bay | 15 | 9 |
| Conseil scolaire de district du Nord-Est de l'Ontario | Public | French | North Bay | Cochrane, Nipissing, Timiskaming | 9 | 6 |
| Algonquin and Lakeshore Catholic District School Board | Public Catholic | English | Napanee | Frontenac, Hastings, Lennox/Addington | 37 | 6 |
| Brant Haldimand Norfolk Catholic District School Board | Public Catholic | English | Brantford | Brant, Haldimand, Norfolk | 30 | 4 |
| Bruce-Grey Catholic District School Board | Public Catholic | English | Hanover | Bruce, Grey | 11 | 2 |
| Catholic District School Board of Eastern Ontario | Public Catholic | English | Kemptville | Lanark, Leeds/Grenville, Prescott/Russell, Stormont/Dundas/Glengarry | 41 | 10 |
| Dufferin-Peel Catholic District School Board | Public Catholic | English | Mississauga | Peel, Dufferin | 123 | 26 |
| Durham Catholic District School Board | Public Catholic | English | Oshawa | Durham | 38 | 8 |
| Halton Catholic District School Board | Public Catholic | English | Burlington | Halton | 45 | 10 |
| Hamilton-Wentworth Catholic District School Board | Public Catholic | English | Hamilton | Hamilton | 48 | 8 |
| Huron Perth Catholic District School Board | Public Catholic | English | Dublin | Huron, Perth | 16 | 2 |
| Huron-Superior Catholic District School Board | Public Catholic | English | Sault Ste. Marie | Algoma | 20 | 3 |
| Kenora Catholic District School Board | Public Catholic | English | Kenora | Kenora | 5 | 1 |
| London District Catholic School Board | Public Catholic | English | London | Elgin, Middlesex, Oxford | 46 | 9 |
| Niagara Catholic District School Board | Public Catholic | English | Welland | Niagara | 51 | 8 |
| Nipissing-Parry Sound Catholic District School Board | Public Catholic | English | North Bay | Nipissing, Parry Sound | 12 | 1 |
| Northeastern Catholic District School Board | Public Catholic | English | Timmins | Cochrane, Timiskaming | 13 | 2 |
| Northwest Catholic District School Board | Public Catholic | English | Fort Frances | Rainy River, Kenora | 6 | 0 |
| Ottawa Catholic School Board | Public Catholic | English | Ottawa | Ottawa | 66 | 17 |
| Peterborough Victoria Northumberland and Clarington Catholic District School Board | Public Catholic | English | Peterborough | Kawartha Lakes, Northumberland, Peterborough, Durham | 31 | 6 |
| Renfrew County Catholic District School Board | Public Catholic | English | Pembroke | Renfrew | 22 | 2 |
| Simcoe Muskoka Catholic District School Board | Public Catholic | English | Barrie | Muskoka, Simcoe | 41 | 9 |
| St. Clair Catholic District School Board | Public Catholic | English | Wallaceburg | Chatham-Kent, Lambton | 26 | 2 |
| Sudbury Catholic District School Board | Public Catholic | English | Sudbury | Sudbury | 17 | 4 |
| Superior North Catholic District School Board | Public Catholic | English | Terrace Bay | Thunder Bay | 9 | 0 |
| Thunder Bay Catholic District School Board | Public Catholic | English | Thunder Bay | Thunder Bay | 18 | 3 |
| Toronto Catholic District School Board | Public Catholic | English | Toronto | Toronto | 167 | 29 |
| Waterloo Catholic District School Board | Public Catholic | English | Kitchener | Waterloo | 46 | 6 |
| Wellington Catholic District School Board | Public Catholic | English | Guelph | Wellington | 17 | 4 |
| Windsor-Essex Catholic District School Board | Public Catholic | English | Windsor | Essex | 39 | 10 |
| York Catholic District School Board | Public Catholic | English | Aurora | York | 90 | 16 |
| Conseil des écoles catholiques du Centre-Est | Public Catholic | French | Ottawa | Frontenac, Hastings, Lanark, Leeds/Grenville, Ottawa, Renfrew | 50 | 10 |
| Conseil scolaire catholique MonAvenir | Public Catholic | French | Toronto | Brant, Durham, Halton, Hamilton, Niagara, Peel, Peterborough, Simcoe, Toronto, Waterloo, Wellington, York | 55 | 10 |
| Conseil scolaire de district catholique de l'Est ontarien | Public Catholic | French | L'Orignal | Prescott/Russell, Stormont/Dundas/Glengarry | 32 | 8 |
| Conseil scolaire de district catholique des Aurores boréales | Public Catholic | French | Thunder Bay | Kenora, Thunder Bay | 10 | 2 |
| Conseil scolaire de district catholique des Grandes Rivières | Public Catholic | French | Timmins | Cochrane, Timiskaming | 34 | 11 |
| Conseil scolaire de district catholique du Nouvel-Ontario | Public Catholic | French | Sudbury | Algoma, Manitoulin, Sudbury | 29 | 10 |
| Conseil scolaire catholique Franco-Nord | Public Catholic | French | North Bay | Nipissing | 13 | 3 |
| Conseil scolaire catholique Providence | Public Catholic | French | Windsor | Chatham-Kent, Essex, Grey, Lambton, Middlesex, Oxford | 26 | 8 |
| Penetanguishene Protestant Separate School Board | Public Protestant | English | Penetanguishene | Town of Penetanguishene | 1 | 0 |
| Bloorview School Authority | Public | English | Toronto | Toronto | 1 | 0 |
| Campbell Children's School Authority | Public | English | Oshawa | Durham | 1 | 0 |
| John McGivney Children's Centre School Authority | Public | English | Windsor | Essex | 1 | 0 |
| Niagara Peninsula Children's Centre School Authority | Public | English | St. Catharines | Niagara | 1 | 0 |
| Ottawa Children's Treatment Centre School Authority | Public | English | Ottawa | Ottawa | 1 | 0 |
| Provincial Schools Branch | Public | English/French | Milton | Brant, Halton, Middlesex, Ottawa | 11 | 11 |
| The KidsAbility School Authority | Public | English | Waterloo | Waterloo | 1 | 0 |
Former School Districts
There were a number of schools governed by "school authorities," which managed schools in remote and sparsely populated regions. Effective September 1, 2009, 20 isolated school authorities were amalgamated with district school boards.- Airy & Sabine District School Authority - merged with Renfrew County DSB
- Atikokan Roman Catholic Separate School Board, Atikokan - merged with Northwest CDSB
- Asquith-Garvey District School Authority, Shining Tree - merged with Rainbow DSB
- Caramat District School Area Board, Caramat - merged with Superior-Greenstone DSB
- Collins District School Area Board, Collins - merged with Lakehead DSB
- Connell and Ponsford District School Area Board, Pickle Lake - merged with Keewatin-Patricia DSB
- Conseil des écoles séparées catholiques de Dubreuilville, Dubreuilville - merged with CSDC du Nouvel-Ontario
- Conseil des écoles séparées catholiques de Foleyet, Foleyet - merged with CSDC des Grandes Rivières
- Foleyet District School Area Board, Foleyet - merged with DSB Ontario North East
- Foleyet Roman Catholic Separate School Board, Foleyet - merged with CSDC des Grandes Rivières
- Gogama District School Area Board, Gogama - merged with DSB Ontario North East
- Gogama Roman Catholic Separate School Board, Gogama
- Hornepayne Roman Catholic Separate School Board, Hornepayne - merged with Huron-Superior DSB and CDSC du Nouvel-Ontario
- Ignace Roman Catholic Separate School Board, Ignace- merged with CSDC des Aurores boréales
- Mine Centre District School Area Board, Mine Centre - merged with Rainy River DSB
- Missarenda District School Area Board, Missanabie - merged with Algoma DSB
- Moosonee Roman Catholic Separate School Board, Moosonee - merged with Northeastern CDSB and CDSC des Grande Rivières
- Murchison and Lyell District School Area Board, Madawaska - merged with Renfrew County DSB
- Nakina District School Area Board, Nakina - merged with Superior-Greenstone DSB
- Northern District School Area Board, Armstrong and Savant Lake - merged with Lakehead DSB and Keewatin-Patricia DSB
- Parry Sound Roman Catholic Separate School Board, Parry Sound - merged with Simcoe-Muskoka CDSB
- Red Lake Area Combined Roman Catholic Separate School Board, Red Lake - merged with Kenora Catholic DSB and CSDC des Aurores boréales
- Upsala District School Area Board, Upsala - merged with Keewatin-Patricia DSB
- Conseil des écoles françaises de la communauté urbaine de Toronto - merged into Conseil Scolaire de District du Centre-Sud-Ouest
- Conseil de la ville de Hamilton - merged into Conseil Scolaire de District du Centre-Sud-Ouest
- East York Board of Education - merged with the Toronto District School Board
- Etobicoke Board of Education - merged with the Toronto District School Board
- Metropolitan Separate School Board - split into the Toronto Catholic District School Board and Conseil scolaire de district catholique Centre-Sud
- North York Board of Education - merged with the Toronto District School Board
- Scarborough Board of Education - merged with the Toronto District School Board
- Toronto Board of Education - merged with the Toronto District School Board
- Board of Education for the City of York - merged with the Toronto District School Board
- York Region Roman Catholic Separate School Board - split into the York Catholic District School Board and Conseil scolaire de district catholique Centre-Sud
School Sections