Gwyneth is a female given name. It is the name of the following people:
- Gwyneth Boodoo (born Trinidad) is an American psychologist and expert on educational measurement
- Gwyneth Cravens, an American novelist and journalist
- Gwyneth Dunwoody (1930–2008), a Member of Parliament in the United Kingdom
- Gwyneth Glyn (born 1979), a Welsh language poet and musician
- Gwyneth Herbert, a British singer-songwriter
- Gwyneth Jones (novelist) (born 1952), a British science fiction and fantasy writer and critic
- Gwyneth Jones (soprano) DBE (born 1936), a Welsh soprano
- Gwyneth Lewis (born 1959), a Welsh poet, and the first National Poet for Wales
- Gwyneth Paltrow (born 1972) an American actress
- Gwyneth Powell (born 1946), an English actress
- Gwyneth Rees (born 1968), a British author of children's books
- Gwyneth Scally, a visual contemporary artist from Tucson, Arizona, United States
- Gwyneth Strong (born 1959), an English actress
- Gwyneth Walker (born 1947), an American composer
Gwyneth is also the name of the following fictional characters:
- Gwyneth (Fur Fighters character), a character in the Fur Fighters video game
- Gwyneth And The Thief, a young adult historical romance novel written by Margaret Moore
- Gwyneth, a character in the Dragonlance novel The Legend of Huma
- Gwynneth, an Australian Masked Owl from Wolves of the Beyond, daughter of Gwyndor from Guardians of Ga'Hoole