John Turnbull
John or Jack Turnbull may refer to:
- Jack Turnbull (footballer), Australian rules footballer
- Jack Turnbull (lacrosse), American lacrosse player
- Jack Turnbull (rugby union), Australian international rugby union player
- John E. Turnbull, Canadian inventor of the first rolling wringer clothes washer, 1843
- John Turnbull (voyager), English explorer to the Pacific in 1800–1805
- John Turnbull (actor), British film actor
- John Turnbull (priest), English Anglican priest
- John Turnbull (cricketer), New Zealand cricketer
- John Turnbull (musician), English pop and rock guitarist and singer
- John W. Turnbull, Canadian politician in the Legislative Assembly of New Brunswick