Peter is a given name that can refer to:
- Peter, a Slytherin student at Hogwarts
- Peter, a portrait hung in Hogwarts Castle
- Peter Blotting, a reporter for the Daily Prophet
- Peter Boat, a wizarding company that made twine and rope
- Peter G. (Godric's Hollow), a man buried in Godric's Hollow
- Peter G. (Little Hangleton), a man buried in Little Hangleton
- Peter Hansen, a Chaser on the Nordic National Quidditch team
- Peter Jones, a Gryffindor student at Hogwarts
- Peter Pettigrew, former Marauder turned Death Eater
Behind the scenes
Real-world individuals with the given name Peter include:
- Peter Best, the actor who portrayed Walden Macnair in the film adaptations of Harry Potter and the Prisoner of Azkaban and Harry Potter and the Order of the Phoenix
- Peter Burroughs, portrayed a bank goblin in the film adaptation of Harry Potter and the Philosopher's Stone
- Peter Cartwright, an actor who played Elphias Doge in the film adaptation of Harry Potter and the Order of the Phoenix
- Peter G. Reed, portrayed a Death Eater in the film adaptations of Harry Potter and the Deathly Hallows
- Peter Mullan, is a Scottish actor and film-maker who portrayed Yaxley in Harry Potter and the Deathly Hallows: Part 1 and Part 2
- Peter O'Farrell, is an actor who portrayed Bozo in the film adaptation of Harry Potter and the Chamber of Secrets
- Peter Polycarpou, a British actor who provided the voice of a Death Eater in the video game adaptation of Harry Potter and the Deathly Hallows: Part 1
- Peter Rowling, the father of J. K. Rowling