John Glyn-Jones (28 August 1909 – 21 January 1997) was a British stage, radio, television and film actor.

His father was a Member of Parliament and he was educated at Bishop's Stortford College and Oxford University. He began his acting career in repertory theatre in Oxford and with the BBC Drama Repertory Company, with whom he played Organ Morgan in the original recording of Under Milk Wood in 1954. As well as acting he was also a producer and director for the BBC, during 1947-51.