| Trillium Lakelands District School Board, Bracebridge Adult & Alternate Education Centre, Adult High School Diploma Program | Bracebridge |
| Trillium Lakelands District School Board, Fenelon Falls - Adult and Alternate Education Centre, Adult High School Diploma Program | Fenelon Falls |
| Trillium Lakelands District School Board, Gravenhurst Adult & Alternate Education Centre, Adult High School Diploma Program | Gravenhurst |
| Trillium Lakelands District School Board, Haliburton Alternative Education and Training Centre, Adult High School Diploma Program | Haliburton |
| Trillium Lakelands District School Board, Huntsville Adult & Alternate Education Centre, Adult High School Diploma Program | Huntsville |
| Trillium Lakelands District School Board, Lindsay Adult & Alternate Education Centre, Adult High School Diploma Program | Lindsay |