Jemma is a female given name and variant spelling of Gemma, meaning gem. It may refer to the following people :
- Jemma Dallender, (born 1988) English Film Actress
- Jemma Dolan, member of the Northern Ireland Assembly;
- Jemma Griffiths (born 1975), birth name of Welsh singer Jem;
- Jemma Lilley (born 1991), English crime fiction writer and murderer
- Jemma McKenzie-Brown (born 1994), an English actress
- Jemma Mitchell (born 1984), British–Australian woman convicted of murder
- Jemma Redgrave (born 1965), British actress;
- Jemma Rose (born 1992), English footballer;
- Jemma Wellesley, Countess of Mornington (born 1974), British make up artist and model.