| Twin Lakes Secondary School | |
| Address: | 381 Birch Street |
| Country: | Canada |
| Established: | 1972 |
| Motto: | Strength in Knowledge |
| Superintendent: | Matthew Webbe[1] |
| Principal: | Tammy Rodaro |
| Enrollment: | 761[2] |
| Enrollment As Of: | 2020 |
| Colours: | Blue, Green, and Silver |
| Team Name: | Thunderbirds |
| Feeders: | Brechin Public, Regent Park, Orchard Park, Harriett Todd, Uptergrove, Rama Central, Guthrie Public School, East Oro |
Twin Lakes Secondary School (also known as TLSS or just Twin) is a secondary school located in Orillia, Ontario. It was established in 1972.[3] After the March 2008 review process that consolidated Orillia's three public high schools into two buildings as a result of cost of maintenance of the aging buildings and the declining enrollment at Park Street Collegiate Institute, Twin Lakes is now one of Orillia's 2 public secondary schools.[4] Twin Lakes' principal is Tammy Rodaro and vice principals are Michael Fogarty and Katie Prentice.
The superintendent of the school is Scott Young. (Area B schools- Orillia, Oro-Medonte & Ramara and Springwater).
TLSS has: Extended French, Life and Skills courses, Co-operative education programs, music, art and drama programs, transportation, construction, yearbook, and computer technology.
Boys'/Girls' Soccer, Boys'/Girls' Rugby, Boys'/Girls' Hockey, Boys'/Girls' Basketball, Boys'/Girls' Volleyball, Track & Field, Girls' Flag Football, Nordic Skiing, Swim Team