Sir David William Evans (4 November 1866 – 17 March 1926) was a Welsh lawyer and public servant, who played a leading role in the fight against tuberculosis in Wales.
In his early adult life, Evans was a very keen sportsman and played rugby union for Oxford University and Cardiff.
Evans was educated at Llandovery School and Jesus College, Oxford, matriculating in 1885.
In 1913, he was appointed as director and legal advisor of the King Edward VII National Memorial Association for the Prevention and Treatment of Tuberculosis; his obituary in The Times said that his "keenness and energy" in this role "unquestionably had far-reaching effects on the health of the Principality".
He died in Cardiff on 17 March 1926, having been suffering with a heart condition for some time that had required him to spend the previous four months away from work.