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Southern Ontario Secondary Schools Association, or SOSSA, is member of OFSAA^[1] and the regional governing body of all secondary school athletic competitions between within the Niagara and Hamilton area representing schools for the Council Scolaire De District Du Centre Sud-Ouest, District School Board of Niagara, Hamilton-Wentworth District School Board, Niagara Catholic District School Board, Couseil Scolaire De District Catholique Centre-Sud and Independent Schools within the Association

SOSSA is divided into four zones that have their own individual championships that qualify teams and student-athletes for the SOSSA championships for all sports. ^[2]

• Zone #1 - Hamilton-Wentworth District School Board and independent schools presently members of zone #1.
• Zone #2 - N.C.A.A. member schools.
• Zone #3 - N.R.H.S.A.A. schools and independent schools presently members of zone #3.
• Zone #4 - N.R.H.S.A.A. schools and independent schools presently members of zone #4.

Each year SOSSA contests championships in the following sports ^[3]

• Southern Ontario Secondary Schools Association (SOSSA)
• Hamilton Wentworth District School Board Athletics (HWDSB)
• Niagara Catholic Athletic Association (NCAA)
• Niagara Region High School Athletic Association (NRHSAA)

• Ontario Federation of School Athletic Associations