* Harry Potter: 11 years old
* Ron Weasley: 11 years old
* Hermione Granger: 11 years old
* Draco Malfoy: 11 years old
* Neville Longbottom: 11 years old
* Albus Dumbledore: Around 115 years old (his exact age is never stated, but it's implied he's very old)
* Severus Snape: Around 30 years old
* Minerva McGonagall: Around 50 years old
* Rubeus Hagrid: Around 40 years old (but he's older than he looks)
It's important to note that while the main characters are all 11 years old, they're in their first year at Hogwarts, which is equivalent to the 6th grade in the U.S.