Ajax High School (AHS) is located in Ajax, Ontario, Canada within the Durham District School Board.

The school offers a wide range of academic and extracurricular activities.

The school also offers a French Immersion program.

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.