John Greenhalgh
John Greenhalgh may refer to:
- John Greenhalgh (footballer) (1898–1987), English footballer with Burnley and Accrington Stanley
 - John Greenhalgh (governor) (died 1651), governor of the Isle of Man
 - Jack Greenhalgh (trade unionist), British trade union leader
 
See also
- Jack Greenhalgh, American cinematographer