| Silverthorn Collegiate Institute | |
|---|---|
 The crest of Silverthorn Collegiate Institute | |
| Address | |
 | |
291 Mill Road , , Canada | |
| Coordinates | 43°38′17″N 79°34′49″W / 43.638080°N 79.580197°W |
| Information | |
| School type | High School |
| Motto | "Nil Veriteur Veritas" (The Truth Fears Nothing) |
| Founded | 1964 |
| School board | Toronto District School Board (Etobicoke Board of Education) |
| Superintendent | Susan Winter |
| Area trustee | Chris Glover |
| School number | 2811 / 941425 |
| Principal | Mark Varvas |
| Grades | 9-12 |
| Enrolment | 875 (2019-20) |
| Language | English |
| Schedule type | Semestered |
| Area | Burnhamthorpe Road and Mill Road |
| Colour(s) | Garnet, Green and Silver |
| Mascot | Spartacus the Spartan |
| Team name | Silverthorn Spartans |
| Yearbook | Veritas |
| Website | www |
Silverthorn Collegiate Institute is a public high school in Toronto, Ontario, Canada. It is located in the neighbourhood of Markland Wood in the former suburb of Etobicoke. It is under the sanction of the Toronto District School Board (the successor to the former Etobicoke Board of Education). The name comes from the Silverthorn Woods that borders to the south and the west. This was the northern limit of an old property known locally as the Silverthorn Mill Farm.