Gwyneth Thomas
{{Short description|American tennis player}}
{{Infobox tennis biography
| name = Gwyn Thomas
| image =
| fullname = Gwyneth Thomas
| country_represented = {{USA}}
| birth_date = {{birth date|1940|07|09|df=yes}}
| birth_place =
| death_date = {{death date and age|2005|10|10|1940|07|09|df=yes}}
| death_place =
| height =
| plays =
| careerprizemoney =
| singlesrecord =
| singlestitles =
| highestsinglesranking =
| FrenchOpenresult = 1R (1959)
| Wimbledonresult = 2R (1960, 1962)
| USOpenresult = QF (1962)
| doublesrecord =
| doublestitles =
| highestdoublesranking =
| FrenchOpenDoublesresult = QF (1959)
| WimbledonDoublesresult = 1R (1959, 1960)
| USOpenDoublesresult = SF (1960)
}}
Gwyneth Thomas (9 July 1940 — 10 October 2005) was an American tennis player of the 1950s and 1960s.
A native of Shaker Heights, Ohio, Thomas was the youngest child of Charles and Gertrude Thomas. She developed her game at the local Cleveland Skating Club and in 1955 won an Orange Bowl title for the 15s age group.{{cite web |title=Gwyneth Thomas's Obituary (2005) The Plain Dealer |url=https://obits.cleveland.com/us/obituaries/cleveland/name/gwyneth-thomas-obituary?id=17111014 |website=Legacy.com |publisher=The Plain Dealer}}
Thomas, who had a best national ranking of sixth, won the singles title at the Tri-State Tennis Championships (now known as the Cincinnati Open) in 1958 and was a runner-up in doubles. She was runner-up to Dorothy Knode at the U.S. Women's Clay Court Championships in 1960.{{cite news |title=Mackay Capture Clay Courts Title |url=https://www.newspapers.com/image/568401322 |work=Times-Advocate |date=July 25, 1960}} She was a member of the U.S. team for the 1961 Wightman Cup but didn't feature in any matches. In 1962 she upset Maria Bueno in the final of the San Juan international and made the quarter-finals of the U.S. National Championships.{{cite news |title=Cleveland Girl Upsets Maria Bueno in Tennis |url=https://www.newspapers.com/image/871181423 |work=Evening Star |date=April 2, 1962}}
In 1978 she was inducted into the Greater Cleveland Sports Hall of Fame.{{cite web |title=Thomas, Gwyneth |url=https://www.clevelandsportshall.com/thomas-gwyneth/ |website=Cleveland Sports Hall of Fame |date=30 November 2009}}