John Jennings may refer to:
Politicians John Jenyns (1660–1717), MP John Jennings (Burton MP) (1903–1990), British Conservative Party politician John Jennings (American politician) (1880–1956), U.S. Representative from Tennessee, 1939–1951 John Jennings (Australian politician) (1878–1968), federal member for South Sydney and then Watson in the 1930s Jack Jennings (politician) (John Joseph Jennings, 1923–1995), member for the electoral district of Ross Smith, 1970–1977 John Jennings (St Albans MP) (died 1642), English Member of Parliament
Musicians John Jennings (musician) (1953–2015), American guitarist, multi-instrumentalist and producer John Jennings, bassist for British band The Ruts
Military John Jennings (Royal Navy officer) (1664–1743), British admiral and politician John Jennings (British Army officer), who played a major part in the Battle of Carrickfergus
Others John Edward Jennings (1906–1973), American historical novelist John T. Jennings, president of the Royal Society of South Australia, 2008–2010 Sir John Jennings (businessman) (1937–2024), British oil industry executive officer, Chancellor of Loughborough University, 2003–2010 John Jennings (clergyman) (1814–1876), Canadian Presbyterian minister John Jennings (footballer) (1905–1997), English footballer for Cardiff City, Middlesbrough and Preston John Jennings (physician) (fl. 18th century), Irish doctor John Jennings (tutor) (1688–1723), English dissenting tutor John Jennings (priest) (1798–1883), Archdeacon of Westminster John Percival Jennings (1923–2003), horticultural adviser for the South Australian Department of Agriculture John Jennings (racing driver), participated in 1970 Greenville 200 Midgley John Jennings (1806–1857), English missionary, founder of the SPG Mission to Delhi John C.T. Jennings, fictional hero of the Jennings books
See also John Gennings (c. 1570–1660), biographer of his brother, Edward Gennings, 17th Century martyr Jonathan Jennings (1784–1834), governor and congressman