John Fenwick
John Fenwick may refer to:
- John Fenwick (14th century MP) for Northumberland (UK Parliament constituency)
- Sir John Fenwick, 1st Baronet, English landowner
- John Fenwick (MP for Morpeth), English politician and soldier who was killed at the Battle of Marston Moor
- John Fenwick (Quaker), English founder of a Quaker colony in Salem, New Jersey
- John Fenwick (Jesuit), English Jesuit
- Sir John Fenwick, 3rd Baronet, English Jacobite conspirator
- John Ralph Fenwick, English physician and radical
- John Fenwick Burgoyne Blackett, British politician
- John Fenwick (bishop), Free Church of England bishop
- John Fenwicke, supported the parliamentary cause during the English Civil War.
- John Fenwick Service Area, a service area for travelers using the New Jersey Turnpike