It could be considered as his mother was a "brilliant witch" and his father a "great wizard" that Harry is quite good as well. He isn't all powerful though but seems to be well off in most of the arts (excluding Divination) as he is a natural in Defence Against the Dark Arts, and has good potions, charms and transfiguration knowledge when he applies himself.
Most of Harry's strength came from his parents, such his natural ability to ride a broom from his father, and perhaps DADA from his mother who was capable of offering the ultimate protection possible for him. But some also came from the part of Voldemort's soul attached to him, and despite being pure evil, Voldemort was a very powerful wizard. The destruction of his soul though didn't seem to affect Harry much which could be explained in a way which is that Harry developed his skills in order to equal Voldemort and defeat him, and that skill continued onwards into his adulthood and his career as an Auror.
Albus Dumbledore.
He was in the Order of the Pheonix but he was an Auror.
A horcrux is a magical device which contains a portion of a wizard's soul.
Hagrid told him he was a wizard.
i can name 7: Harry Potter and the Sorcerers Stone (or Philosophers Stone if in Great Britain) Harry Potter and the Chaber of Secrets Harry Potter and the Prisoner of Azkaban Harry Potter and the Goblet of Fire Harry Potter and the Order of the Phoenix Harry Potter and the Half Blood Prince Harry Potter and the Deathly Hallows
Harry Potter is a wizard.
Harry Potter is a wizard.
Yes, there is wizard chess in the world of Harry Potter.
NO! harry potter is the main wizard in the thilled adventures of Harry Potter
Harry Potter was a wizard
Yes. He became the greatest wizard of all time (In fiction, of course).
Harry Potter learned he was a wizard on his eleventh birthday, the 31st July 1991.
Yes.
He is a wizard.
No, Harry Potter is not a piglet, he is a human who also happens to be a wizard.
The "inventor" of the Harry Potter movies is technically J.K Rowling and she is not a wizard. Wizardry is not real.
That he was a wizard and that he can talk to snakes.