Ontario Schools
- Cardinal Leger Secondary School
- Carleton Place High School
- Carleton University
- Carleton University Faculty Of Public And Global Affairs
- Cartwright High School
- Castlebrooke Secondary School
- Castlefrank Elementary School
- Castlemore Public School
- Cathedral High School
- Catholic Central High School
- Catholic Central High School
- Catholic District School Board Of Eastern Ontario
- Cawthra Park Secondary School
- Cayuga Secondary School
- Cecil Facer Secondary School
- Cedar Grove Public School S S #20
- Cedar Hill School House Ss #1
- Cedarbrae Collegiate Institute
- Cedarview Middle School
- Centennial College
- Centennial College Theatre Arts And Performance
- Centennial Collegiate Vocational Institute
- Centennial Secondary School
- Centennial Secondary School
- Central Algoma Secondary School
- Central Elgin Collegiate Institute
- Central Etobicoke High School
- Central Hastings School Secondary School
- Central Huron Secondary School
- Central Peel Secondary School
- Central Technical School
- Central Toronto Academy
- Centre Dufferin District High School
- Centre Hastings Secondary School
- Centre Wellington District High School
- Centre For Indigenous Theatre
- Centre For Research In Neurodegenerative Diseases
- Centre For Research In Reasoning, Argumentation, And Rhetoric
- Centre Professionnel Et Technique Minto
- Century Secondary School
- Chaminade College School
- Chang School Of Continuing Education
- Chapleau High School
- Charles H Best Middle School
- Charles O Bick College
- Charlottenburgh And Lancaster District High School
- Chatham Kent Secondary School
- Chelmsford Valley District Composite School
- Chinguacousy Secondary School
- Chippewa Secondary School
- Christ The King Catholic School (toronto)
- Christ The King Catholic Secondary School
- Churchill Heights Public School
- Clarington Central Secondary School
- Clarke High School
- Clarke Road Secondary School
- Clarkson Secondary School
- Claude Watson School For The Arts
- Clinton Street Junior Public School
- Cobourg Cdci West
- Cobourg Collegiate Institute
- Cochrane High School
- College Avenue Secondary School
- College Heights Secondary School
- College Of Computational, Mathematical, And Physical Sciences
- College Of Management And Economics
- College Of Physicians And Surgeons Of Ontario
- Collingwood Collegiate Institute
- Collège Boréal
- Collège Notre Dame
- Collège Catholique Franco Ouest
- Collège Catholique Samuel Genest
- Collège Des Grands Lacs
- Colonel By Secondary School
- Columbia International College
- Concordia Lutheran Theological Seminary
- Conestoga College
- Confederation College
- Confederation High School
- Confederation Secondary School
- Confucius Institute At Seneca College
- Conrad Grebel University College
- Conseil Scolaire Catholique Providence
- Conseil Des Écoles Catholiques Du Centre Est
- Conseil Des Écoles Françaises De La Communauté Urbaine De Toronto
- Conseil Scolaire Viamonde
- Conseil Scolaire De District Catholique Centre Sud
- Conseil Scolaire De District Catholique De L'est Ontarien
- Conseil Scolaire De District Catholique Des Aurores Boréales
- Conseil Scolaire De District Catholique Du Nouvel Ontario
- Conseil Scolaire Public Du Grand Nord De L'ontario
- Conseil Scolaire Public Du Nord Est De L'ontario
- Convent Glen Catholic School
- Convoy International Secondary Academy
- Cool Climate Oenology And Viticulture Institute
- Coppard Glen Public School
- Cornwall Collegiate And Vocational School
- Corpus Christi Catholic Secondary School
- Corpus Christi School
- Courtice Secondary School