John Crocker was a British Army officer.
John Crocker may also refer to:
J. Howard Crocker (John Howard Crocker; 1870–1959), Canadian educator and sports executive John Crocker (jazz musician) John Crocker (physicist) John Crocker (MP for Tavistock), English MP for Tavistock (UK Parliament constituency), 1394 John Crocker (died 1508) (c. 1433–1508), English MP for Devon (UK Parliament constituency), 1491 John Crocker (actor) (1925–2015), English actor John Crocker, the post-scratch version of John Egbert from Homestuck