John Dennis
John Dennis may refer to:
Law and politics
- John Dennis (1771–1806), American politician in Maryland
- John Dennis (1807–1859), American politician in Maryland
- John William Dennis, British politician, MP for Birmingham Deritend
- John Dennis (Missouri politician), American politician in Missouri
- John N. Dennis, American politician in New Jersey
- John Dennis (mayor), American politician in Indiana
Others
- John Dennis (dramatist), English dramatist
- John [Stoughton Dennis], Canadian surveyor
- John B. Dennis, American military general
- Jack Dennis (cricketer), English cricketer
- John Dennis (ornithologist), American ornithologist
- John Dennis (bishop), English Anglican bishop
- John E. Dennis, American mathematician
- John Dennis (talk [show host)], American radio talk show host
- John Dennis (diplomat), British diplomat and ambassador