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), New Zealand international John William Whittaker (c.1790–1854), Anglican clergyman John C. Whittaker (born 1953), American archaeologist