John Cavendish (disambiguation)
John Cavendish (1346–1381) was a British nobleman and politician. John Cavendish may also refer to:

 John Cavendish, 5th Baron Chesham (1916–1989), British Conservative politician
 Lord John Cavendish (1732–1796), English politician
 Jonathan Cavendish, producer of films such as Bridget Jones's Diary