Frank Kingsley Griffith, MC (23 December 1889 – 25 September 1962) was a British Liberal Party politician, barrister and County Court judge.

Frank Kingsley Griffith was born on 23 December 1889 in Upper Norwood, Surrey, the son of Florence Emily "Mimmie" (née Hudson) and Frank F Griffith, an officer in the Volunteer Force, later a Director of a Printing Factory who was elected as the first Mayor of the Municipal Borough of Bromley in 1904.

He was well known as a good platform performer in politics and for being an outstanding young thinker ranked alongside the likes of Elliott Dodds.

[7] Griffith fought mainly on the traditional Liberal stance of Free Trade but also called for a programme of public works together with social reform and industrial reconstruction.

[6] This platform anticipated the Liberal election manifesto of 1929 based on the 'coloured' books of David Lloyd George and the economic models of John Maynard Keynes.

[10] In the law, Griffith was Recorder of Richmond, Yorkshire,[11] from 1932 to 1940 and in 1940 he was appointed a County Court Judge in Hull which required him to vacate his Commons seat and create a by-election.