John Blackwell

John Blackwell may refer to:


 * John Blackwell (Alun) (1797–1840), Welsh poet
 * John Blackwell (engineer) (c. 1775–1840), English civil engineer
 * John Blackwell (musician) (1973–2017), drummer in the New Power Generation
 * John Blackwell (referee), English football referee and soldier
 * Ken Blackwell (John Kenneth Blackwell, born 1948), American politician, author, and conservative activist