Harry Potter is generally considered to be about 5 feet 11 inches to 6 feet tall (180 cm to 182 cm) in the books, with some indications he might just reach 6 feet at most. This is consistent with his growth spurt during his teenage years, and he is usually described as not taller than 6 feet canonically.
The height of the actor Daniel Radcliffe, who portrayed Harry Potter in the films, is about 5 feet 5 inches (1.65 m), but this is not considered the character's canonical height in the books.