John Co(c)k may refer to:
John Cock (MP for Sandwich), see Sandwich (UK Parliament constituency) John Cock (MP died 1557), MP for Hertfordshire and Calne John Cock (RAF officer), Australian-born fighter pilot of World War II Jack Cock, footballer John Cok (fl. 1420), MP for Chichester John S. Cock (1801–1869), American politician and judge from Ohio
See also John Cocke (disambiguation) John Cocks (disambiguation) Johncock