Robert Buckley Comyn (26 October 1792 - 23 May 1853) was a British judge who served as Chief Justice of the Madras High Court from 1835 to 1842. Born at Tottenham, the third son of Rev. Thomas Comyn, M.A. (Balliol College, Oxford), vicar of Tottenham and Chaplain of the Royal Hospital, Chelsea, and Harriet Charlotte (née Stables), Comyn was educated at the Merchant Taylors' School, then St John's College, Oxford (B.A. 1813, M.A. 1815). His grandfather, Stephen Comyn, of Widial, Herts., was a barrister and Bencher of the Inner Temple, as was his uncle, Robert Valens Comyn, and Robert elected to join this profession.