Guirne Creith (born Gladys Mary Cohen in London on 21 February 1907; died 1996) was an English composer and pianist most active in the 1920s and 1930s.
She received the Charles Lucas Prize in 1925, having entered the Royal Academy of Music just two years before under the pseudonym Guirne M Creith.
As a student at the Academy she studied composition under Benjamin Dale and conducting under Sir Henry Wood.
She later studied piano with the Swiss pianist and renowned Bach interpreter Edwin Fischer.
After her death she became known for her Concerto in G minor for Violin and Orchestra, which had been premiered by Albert Sammons, conducted by Constant Lambert, on 19 May 1936.
It was revived in 2008 by Lorraine McAslan and the Royal Scottish National Orchestra, conducted by Martin Yates.