John Mordaunt
John Mordaunt may refer to:
- John Mordaunt (speaker), Tudor politician and Speaker of the House of Commons
- John Mordaunt, 1st Baron Mordaunt
- John Mordaunt, 2nd Baron Mordaunt
- John Mordaunt, 1st Earl of Peterborough
- John Mordaunt, 1st Viscount Mordaunt, Royalist conspirator
- Sir John Mordaunt, 5th Baronet
- John Mordaunt, Viscount Mordaunt
- John Mordaunt (British Army officer), English general and Member of Parliament
- John Mordaunt (MP), British soldier and Member of Parliament
- Sir John Mordaunt, 7th Baronet
- Sir John Mordaunt, 9th Baronet
- Colonel John Mordaunt, in Lucknow and the subject of ''Colonel Mordaunt's Cock Match''