John Grundy
John or Jack Grundy may refer to:
- John Grundy (television presenter), English television presenter and author
- John Grundy Sr., English land surveyor and civil engineer
- John Grundy Jr., English civil, drainage and canal engineer
- Jack Grundy (footballer), English association footballer
- Jack Grundy (rugby league), English rugby league player
- John Clowes Grundy, English printseller and art patron
- Jack Grundy (cricketer), English cricketer