Alex is a given name that can refer to:
- Alex Sykes, a Slytherin student at Hogwarts in the 1990s.
Behind the scenes
Real-world individuals with the given name Alex include:
- Alex Argenti, an Italian-born British actress who played the uncredited role of "Wizard" in the film version of Harry Potter and the Goblet of Fire
- Alex Crockford, the actor who porteyed Charlie Weasley in the film version of Harry Potter and the Prisoner of Azkaban
- Alex Howes, provided the voice for a Hufflepuff student in the Harry Potter and the Half-Blood Prince video game
- Alex Palmer, the actor who portrayed Avery in the film version of Harry Potter and the Goblet of Fire
- Alex Tregear, the actress who voiced Susan Bones in the vide game version of Harry Potter and the Order of the Phoenix