O'gorman High School
O'Neill Collegiate and Vocational Institute
O.m. Irwin Middle School
Oak and Orca Bioregional School
Oak Bay Secondary
Oak Bluff Colony Hog Farm
Oak Bluff Community School
Oak Hill School
Oak Park High School
Oak Ridges Public School
Oakbank Elementary School
Oakdale Park Middle School
Oakenwald School
Oakridge Jr Public School
Oakridge Public School
Oakridge Secondary School
Oakville Christian School
Oakville College Careers and Academics
Oakville School
Oakville Trafalgar High School