O and M High School
O M MacKillop Public School
O'Connor Public School
O'gorman High School
O'Neill Collegiate and Vocational Institute
Oak Ridges Public School
Oakdale Park Middle School
Oakridge Jr Public School
Oakridge Public School
Oakridge Secondary School
Oakville Christian School
Oakville College Careers and Academics
Oakville Trafalgar High School
Oakville-Trafalgar Secondary School
Oakwood Collegiate Institute
Oakwood Elementary School
Oakwood Public School
Oasis Alternative Secondary School
Ocdsb Westwind Ps
Ogden Jr Public School