Hogwarts is a coeducational, secondary boarding school, taking children from ages eleven to eighteen, in line with real-world combined secondary and sixth form institutions in Britain.

In the Harry Potter universe, the standard oldest age for a student at Hogwarts is 18 or 19 years old. Most students begin their education at age 11 and complete seven years of schooling. Because the wizarding world’s legal adulthood begins at 17, students in their final "Seventh Year" are technically adults while still in school. For 2026 lore enthusiasts, it's worth noting that a student could be slightly older if they had to repeat a year due to illness or personal reasons—though this is rarely mentioned in the books. The only way to be significantly "older" at Hogwarts would be as a member of the faculty; for instance, Professor Binns (the ghost) is centuries old. Theoretically, if a non-human student from a long-lived race like centaurs were allowed to enroll late, they could be older, but within the established British Secondary School model that Hogwarts follows, a student typically graduates the year they turn 18.