Gwendoline Elizabeth Davies, CH (11 February 1882 – 3 July 1951), was a Welsh philanthropist and patron of the arts who, with her sister Margaret, is recognised as the most influential collector of Impressionist and 20th-century art in Wales. She and her sister were independently wealthy, their fortune inherited from the businesses created by their grandfather, the industrialist David Davies. Davies and her sister created one of the most important private collections of art in Britain and donated their total of 260 works to what is now the National Museum Wales in the mid-20th century.