| Clarke High School | |
| Established: | 1962 |
| Type: | Public |
| District: | Kawartha Pine Ridge District School Board |
| Grades: | 9-12 |
| Superintendent: | Peter Mangold |
| Principal: | Silvia Grdovic |
| Enrollment: | 257 (2018)[1] |
| Coordinates: | 43.9433°N -78.6017°W |
| Streetaddress: | 3425 Highway 35/115 |
| Postcode: | L1B 0R7 |
| City: | Newcastle |
| State: | Ontario |
| Country: | Canada |
Clarke High School is a public secondary school in Newcastle, Ontario, Canada, within the Kawartha Pine Ridge District School Board. It is the only secondary school in Newcastle, and has three feeder schools: Newcastle Public School, Orono Public School, and The Pines Senior Public School.[2]