John Mervyn Addison (16 March 1920 – 7 December 1998) was a British composer best known for his film scores.

Addison was born in Chobham, Surrey to a father who was a colonel in the British Army, and this influenced the decision to send him to school at Wellington College, Berkshire. At the age of sixteen he entered the Royal College of Music, where he studied composition with Gordon Jacob, oboe with Léon Goossens, and clarinet with Frederick Thurston. This education ended in 1939 with service in World War II. Addison served with the British XXX Corps in the 23rd Hussars. He was a tank officer in the Battle of Normandy and wounded at Caen, later participating in Operation Market Garden. At the end of the war, he returned to London to teach composition at the Royal College of Music.