David Davies, 1st Baron Davies (11 May 1880 – 16 June 1944), was a Welsh Liberal politician and public benefactor, the grandson of the industrialist, David Davies "Llandinam". The barony was created for him in 1932.
Davies was born and died at Llandinam, Montgomeryshire. His father, Edward Davies, was "Llandinam's" only son. He was educated at Merchiston Castle School and King's College, Cambridge, graduating in 1903. Like his two sisters, Gwendoline and Margaret, who became renowned patrons of the arts, Davies was a philanthropist who donated to a number of good causes both locally and nationally. In 1910 he contributed £150,000 to the King Edward VII Welsh National Memorial, which was formed with the aim of eradicating tuberculosis in Wales.
Politically and personally, David now followed the lead set by his grandfather. From 1906 to 1929, he was the Liberal Member of Parliament for the Montgomeryshire constituency. After 1929 when he stood down as MP to accept a seat in the Lords, Davies continued to support the official Liberal Party. He became President of Montgomeryshire Liberal Association and was at odds with his successor as MP, Clement Davies. In 1931 Clement Davies became a Liberal National and continued to support the National Government after the official Liberal Party moved into opposition in 1933. In 1938 with a general election likely to occur in the near future, Lord Davies put pressure on Clement Davies by persuading the Montgomeryshire executive to seek clarification from their MP on his views regarding the National Government and appeasement. The MP shortly after opposed appeasement and resigned the Liberal National whip.