Northern Secondary School is a public high school in Toronto, Ontario, Canada. It teaches grades 9 through 12. It is a part of the Toronto District School Board (TDSB). Prior to 1998 it was within the Toronto Board of Education (TBE).
The films Carrie and Resident Evil: Apocalypse were filmed inside the school. The academic decathlon scene of Billy Madison was filmed in the school's auditorium. Numerous commercials have also been filmed on the school's premises.