| St. Martin Secondary School | |
|---|---|
 St. Martin Secondary School's Front Entrance and Facade | |
| Address | |
 | |
2470 Rosemary Drive , , Canada | |
| Coordinates | 43°33′25″N 79°38′10″W / 43.557°N 79.636°W |
| Information | |
| Other name | SMSS |
| Type | Separate secondary school |
| Motto | Goodness, Discipline and Knowledge |
| Religious affiliation(s) | Roman Catholic |
| Established | 1968 |
| School board | Dufferin-Peel Catholic District School Board |
| Superintendent | Deborah Finegan-Downey |
| Area trustee | Luz del Rosario (Ward 6) Bruno Iannicca (Ward 7) |
| School number | 823953 |
| Principal | Maria Pallotta |
| Grades | 9 to 12 |
| Enrolment | 1088 (2019) |
| Area | Mississauga South |
| Colour(s) | Purple and Gold |
| Mascot | Marty the Mustang |
| Team name | Mustangs |
| Feeder to | St. Gerard, St. John XXIII, St. Jerome, Mary Fix, St. Catherine Of Siena |
| Website | www |
St. Martin Secondary School is a separate Roman Catholic secondary school located in the Erindale neighbourhood of Mississauga, Ontario, Canada. It is under the jurisdiction of the Dufferin-Peel Catholic District School Board. The current principal of St. Martin Secondary School is Maria Pallotta. The school has approximately 1088 students (2019).
The school offers a Specialist High Skills Major (SHSM) in Sports, and Hospitality and Tourism.