John Sexton was President of New York University.
John Sexton or Jack Sexton may also refer to:
- John Sexton (photographer) (born 1953), American photographer
- John Sexton (MP for Canterbury), Member of Parliament (MP) for Canterbury, 1393-1407
- John Henry Sexton (1863–1954), Baptist minister in South Australia
- John W. Sexton (born 1958), Irish poet
- John Sexton & Co, grocer
- John Sexton (rugby union), b. 1963, Irish rugby player
- Johnny Sexton, b. 1985, Irish rugby player
- Jack Sexton (footballer, born 1907) (1907–1935), Australian rules footballer
- Jack Sexton (footballer, born 1925) (1925–2014), Australian rules footballer