John Palmer of Bath (1742 – 16 August 1818) was a theatre owner and instigator of the British system of mail coaches that was the beginning of the great British post office reforms with the introduction of an efficient mail coach delivery service in Great Britain during the late 18th century. He was Mayor of Bath on two occasions and Comptroller General of the Post Office, and later served as Member of Parliament for the constituency of Bath between 1801 and 1807.