Sir James Peter Comyn (8 March 1921 – 5 January 1997) was an Irish-born barrister and English High Court judge. The scion of a prominent Nationalist legal family, Comyn was sent to England after they fell out with Éamon de Valera. Considered by many to be “the finest all-round advocate at the English bar”, Comyn was appointed to the High Court of Justice in 1978, serving on the bench until his retirement in 1985.