High school education in Canada typically starts at Grade 9, which is generally attended by students around the age of 14 or 15. High school comprises Grades 9 to 12, with students graduating at the end of Grade 12, usually around the age of 17 or 18. The specific age range can vary slightly depending on the student’s birthdate and the province’s education system. Additionally, adults are not discouraged from pursuing public highschool education in the situation that they lack it.