John Trevelyan may refer to:
Sir John Trevelyan, 2nd Baronet (1670–1755), British MP Sir John Trevelyan, 4th Baronet (1735–1828), British MP John Trevelyan (censor) (1903–1986), Secretary of the Board of the British Board of Film Censors John Trevelyan (chess player) (born 1948), Welsh chess player
See also Trevelyan (disambiguation) The Trevelyan baronets of Nettlecombe