We welcome the following associations and teams to the 2025 OFSAA Boys’ AA Basketball Championships…..
| Team & Association | Sponsor |
| CISAA Crescent School (Seed #17)  |
 |
| COSSA Crestwood S.S. (Seed #19)  |
 |
| CWOSSA Bishop Macdonell C.H.S. (Seed #8)  |
 |
| EOSSAA Thousand Islands S.S. (Seed #1)  |
 |
| GBSSA 1 St. Joseph’s C.H.S. (Seed #3)  |
 |
| GBSSA 2 Patrick Fogarty C.S. (Seed #20)  |
 |
| GHAC King’s Christian Collegiate (Seed #6)  |
 |
| LOSSA Holy Trinity S.S. (Seed #9)  |
 |
| NCSSAA Samuel-Genest C.C. (Seed#10) |
 |
| NEOAA Timmins High & V.S. (Seed #11)  |
 |
| NOSSA Lo-Ellen Park S.S. (Seed #4)  |
 |
| NOSSA – Host West Ferris S.S. (Seed #12)  |
 |
| NWOSSAA Westgate C. & V.I. (Seed #18)  |
 |
| ROPSSAA Ascension of Our Lord C.S.S. (Seed #15)  |
 |
| SOSSA Sir Allan MacNab S.S. (Seed #5)  |
 |
| SWOSSAA Tecumseh Vista Academy (Seed #14)  |
 |
| TDCAA St. Mother Teresa C.A. (Seed #2)  |
 |
| TDSSAA George S. Henry Academy (Seed #7)  |
 |
| WOSSAA Regina Mundi Catholic College (Seed #13)  |
 |
| YRAA Woodbridge College (Seed #16)  |
 |
