Thornhill Secondary School
| Thornhill Secondary School | |
|---|---|
| Address | |
167 Dudley Avenue , , L3T 2E5 Canada | |
| Coordinates | 43°48′35″N 79°25′13″W / 43.80972°N 79.42028°W |
| Information | |
| School type | High school |
| Motto | Post Proelium Praemium - "After the Struggle, the Reward" |
| Religious affiliation(s) | Secular |
| Founded | 1954 |
| School board | York Region District School Board |
| Superintendent | Grant Fawthrop |
| Area trustee | Jenny Chen |
| School number | 947792 |
| Principal | Karen Fogleman |
| Grades | 9-12, offers AP level subjects |
| Enrolment | 823 (October 2021) |
| Language | English |
| Colour(s) | Black and Yellow |
| Mascot | Tiger |
| Newspaper | Eye of the Tiger |
| Website | www |
| Last updated: February 2024 | |
Thornhill Secondary School (TSS) is a secondary school in Thornhill, Ontario, Canada. Founded in 1955, the school is administered by the York Region District School Board system.