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 (1865–1949), British politician, MP for Birmingham Deritend John Dennis (Missouri politician) (1917–2000), American politician in Missouri John N. Dennis (born 1933), American politician in New Jersey John Dennis (mayor), American politician in Indiana
Others John Dennis (dramatist) (1658–1734), English dramatist John Stoughton Dennis (1820–1885), Canadian surveyor John B. Dennis (1835–1894), American military general Jack Dennis (cricketer) (John Newman Dennis, 1913–2006), English cricketer John Dennis (ornithologist) (c. 1916–2002), American ornithologist John Dennis (bishop) (1931–2020), English Anglican bishop John E. Dennis (born 1939), American mathematician John Dennis (talk show host) (born c. 1952), American radio talk show host John Dennis (diplomat) (born 1959), British diplomat and ambassador
See also
Jack Dennis (born 1931), American electrical engineer and computer scientist Jackie Dennis (1942–2020), Scottish singer John Dennys (died 1609), English poet and fisherman