John Whittaker

• John Whittaker (UKIP politician), British MEP
• John [Edmondson Whittaker], British Member of Parliament
• John Macnaghten Whittaker, British mathematician and university administrator
• John Whittaker (businessman), British billionaire
• John Whittaker (rugby league), New Zealand rugby league player
• John [William Whittaker], Anglican clergyman
• John C. Whittaker, American archaeologist
• John S. Whittaker, Justice of the Louisiana Supreme Court