John Barr
John Barr may refer to:
- John W. Barr, U.S. federal judge
- John Barr (Canadian politician), Canadian physician and politician
- John Barr (New Zealand politician), member of the New Zealand Legislative Council
- John Barr (poet, born 1809), Scottish-New Zealand poet
- John Barr (basketball), American basketball player
- John Barr (shinty), Scottish shinty player
- John Barr (footballer, born 1885), Scottish footballer
- John Barr (footballer, born 1917), Scottish footballer
- John Barr (librarian), New Zealand librarian
- John E. Barr, member of the Governing Body of Jehovah's Witnesses and related offices
- John Barr (American poet), president of Poetry Foundation
- John Barr, a fictional character and namesake of the Jonbar hinge concept