John Llewellyn
# John Llewellyn

John Llewellyn may refer to:

* John Llewellyn (fencer) (born 1957), British fencer who appeared at three Olympic Games
* John Llewellyn (racing driver), British former auto racing driver
* Sir John Llewellyn (academic), academic administrator in New Zealand and Great Britain
* John Anthony Llewellyn (1933–2013), British-born American scientist and NASA astronaut
* Sir John Dillwyn-Llewellyn, 1st Baronet (1836–1927), Welsh Conservative Member of Parliament
* John Seys-Llewellyn (1912–2003), Welsh barrister and judge
* John Llewellin, 1st Baron Llewellin (1893–1957), British army officer and politician
