David Lewis Davies (1873 – 25 November 1937) was a British Labour Party politician. He was the Member of Parliament (MP) for Pontypridd from 1931 to 1937. He first stood for Parliament at the 1918 general election, when Pontypridd was won by the Coalition Liberal candidate Thomas Lewis. Lewis was forced to seek re-election in July 1922 when he was appointed as a Lord Commissioner of the Treasury (a nominal post held by a government whip), and the by-election was won by a new Labour candidate, Thomas Jones.