Derek is a given name that can refer to:
- Derek, a Hogwarts student that began attending school in 1993
- Derek (Wizard Card Collector's Club an older Howarts student who ran the Wizard Card Collector's Club at least from 1991-1993
Behind the scenes
Real-world individuals with the given name Derek include:
- Derek Deadman, portrayed Tom, the Leaky Cauldron Landlord in the film adaptation of Harry Potter and the Philosopher's Stone
- Derek Hough, played a Hogwarts student in the film adaptation of Harry Potter and the Philosopher's Stone
- Derek Powell, portrayed a wedding guest at the Wedding of William Weasley and Fleur Delacour in Harry Potter and the Deathly Hallows: Part 1