Sir Ellis Jones Ellis-Griffith, 1st Baronet, PC, KC (23 May 1860 – 30 November 1926) was a British barrister and radical Liberal politician.

[5] He served in the Liberal administration of H. H. Asquith as Under-Secretary of State for the Home Department from 1912 to 1915, in which position he played an important role in steering the Welsh Disestablishment Bill through the House of Commons, and was sworn of the Privy Council in 1914.

He then unsuccessfully contested the University of Wales constituency in 1922, before returning to the House of Commons in 1923, when he was elected for Carmarthen, but he resigned the seat the following year, citing personal unfulfillment in his parliamentary career.

In November 1926, Ellis-Griffith (who had previously suffered small bouts of ill health) was in Swansea, as defence in a manslaughter case at the assizes court.

It was noted during the day that Griffith appeared unwell, and after retiring to his room at the Metropole Hotel that evening, he was found by two colleagues, in great pain, on the floor.