| Ajax High School | |
| Streetaddress: | 105 Bayly Street East |
| Region: | Durham Region |
| Province: | Ontario |
| Postalcode: | L1S 1P2 |
| Country: | Canada |
| Coordinates: | 43.8444°N -79.0139°W |
| School Number: | 905-683-1610 |
| Years: | Grade 9-12 |
| Enrolment: | 1,174[1] |
| Enrolment As Of: | 2023-2024 |
| Principal: | Alicia Russell[2] |
| Hours In Day: | 6 Hours |
| Colours: | Blue and White |
| Mascot: | Ramy The Ram |
| Team Name: | Rams |
| Established: | 1956 |
Ajax High School (AHS) is located in Ajax, Ontario, Canada within the Durham District School Board. It is the largest secondary school in southern Ajax and the fourth-largest in all of Ajax. The school offers a wide range of academic and extracurricular activities. The school also offers a French Immersion program. Ajax High School was given a 5.5 (out of 10) rating in 2012/13 and ranked 478th out of 740 schools across Ontario.[3] The schools official mascot is Ramy The Ram and the official colours are blue and white.[4]
The school was opened in 1956 and has since undergone several large expansions. In the 1960s, a large section that today houses the main office, cafetorium, front entrance, courtyard, as well as several classrooms, was added. Later, in the early 2000s, a wing was added to the east side of the building. Many of these classrooms are now devoted to mathematics and science courses. The school also hosts a football field that is shared with surrounding schools.