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
This disambiguation page lists articles about people with the same name.
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