Gemma is a given name that can refer to:
- Gemma Farley, a Slytherin student at Hogwarts in the 1980s and early 1990s
Behind the scenes[]
Real-world individuals with the given name Gemma include:
- Gemma Boyle, the actress who portrayed Unidentified Slytherin Girl in the film adaptations
- Gemma Jones, the actress who portrays Madame Pomfrey in the Harry Potter films
- Gemma Kayla, the actress who portrays a Ravenclaw Senior in Harry Potter and the Deathly Hallows: Part 2.
- Gemma Padley, the actress who portrayed Penelope Clearwater in the film adaptation of Harry Potter and the Chamber of Secrets