John Orr
John or Johnny Orr may refer to:
- John Boyd Orr, Scottish doctor, biologist, politician and Nobel peace laureate
- Sir John Orr , Scottish police officer and the first chief constable of Lothian & Borders Police
- John Herbert Orr, American entrepreneur
- John Leonard Orr, American arsonist, former fire captain and arson investigator
- John Orr , Bishop of Tuam, Killala, and Achonry
- John Orr , founder of John Orr's, a South African department store chain
- Sir John Orr , Scottish police officer, Chief Constable of Strathclyde Police
- John Orr , Scottish rugby football player
- John Orr , British linguist
- John Stewart Orr, Scottish medical physicist and researcher
- Johnny Orr , American basketball and baseball player
- Johnny Orr , American basketball player and coach
- Johnny Orr , Scottish footballer with Blackburn Rovers
- John William Orr, known professionally as J. W. Orr, prominent American wood engraver
- John Orr , Scottish lawn bowler
- John Orr, Scottish indoor bowler
- John Orr, Irish Anglican priest