St. Jean de Brebeuf Catholic High School, also known as SJB, is a Catholic high school located in Woodbridge, Ontario, Canada. Opened in September 2005 to about 600 students, it has since grown to about 1500 enrolled students. The school started with only grades 9 and 10 in the first year it opened. SJB is part of the York District Catholic School Board (YCDSB). St. Jean de Brebeuf has six computer labs, two full size gyms, two full size soccer fields, tennis courts, and a baseball diamond.