John Barlow
John Barlow may refer to:
- John Barlow (diplomat) (16th century), English Tudor diplomat and spy
- Sir John Barlow, 1st Baronet of Slebetch (c. 1652–1695), see Barlow Baronets
- John Barlow (clergyman) (1799-1869), Anglican clergyman and scientist
- John Barlow (entomologist) (1872-1944), American entomologist and college administrator
- Sir John Barlow, 1st Baronet (1857–1932), British businessman and Member of Parliament
- Sir John Barlow, 2nd Baronet (1898–1986), British Member of Parliament 1951–1966
- John Barlow (novelist) (born 1967), English novelist
- John Brereton Barlow, physician, see Mitral prolapse
- John Noble Barlow (1861–1917), impressionist painter
- John Peleg Barlow (1918-1985), American oceanographer
- John Perry Barlow (born 1947), digital rights activist and former lyricist for the Grateful Dead
- John W. Barlow (1838–1914), career officer in the United States Army
- John Y. Barlow (1874–1949), Mormon fundamentalist and polygamist
- F. John Barlow, American businessman and mineral collector, see Barlow Planetarium