John Whittaker

John Whittaker may refer to:
 * John Whittaker (UKIP politician) (born 1945), British MEP
 * John Edmondson Whittaker (1897–1945), British Member of Parliament
 * John Macnaghten Whittaker (1905–1984), British mathematician and university administrator
 * John Whittaker (businessman) (born 1942), British billionaire
 * John Whittaker (rugby league) (1950–2020), New Zealand rugby league player
 * John William Whittaker (c. 1790–1854), Anglican clergyman
 * John C. Whittaker (born 1953), American archaeologist
 * John S. Whittaker (1817–c. 1897), Justice of the Louisiana Supreme Court