Southern Ontario Secondary School Association (SOSSA)
The Association shall consist of members’ schools in that area so designated as SOSSA by the Ontario Federation of School Athletic Associations (OFSAA). The term "Secondary School" shall be taken to include all Collegiate Institutes, High Schools or equivalents, and Vocational Schools. The membership is comprised of Public, French, Catholic, French Catholic and Independent School Boards:
SOSSA is a member of the Ontario Federation of School Athletic Association (OFSAA).