John Orr

John or Johnny Orr may refer to:
John Boyd Orr, 1st Baron Boyd-Orr (1880–1971), Scottish doctor, biologist, politician and Nobel peace laureate
John Henry Orr (1918–1995), Scottish police officer and the first chief constable of Lothian & Borders Police
John Herbert Orr (1911–1984), American entrepreneur
John Leonard Orr (born 1949), American arsonist, former fire captain and arson investigator
John Orr (bishop) (1874–1938), Bishop of Tuam, Killala, and Achonry
John Orr (police officer), chief constable of Strathclyde police (1996–2001) and senior investigating officer at the Lockerbie air disaster
John Orr (rugby union), Scottish rugby football player
Johnny Orr (basketball, born 1918), American basketball and baseball player
Johnny Orr (basketball, born 1927) (1927–2013), American basketball player and coach
John William Orr (1815–1887), known professionally as J. W. Orr, prominent American wood engraver