John Nicholl

John Nicholl may refer to:


 * John Nicholl (mariner) (fl. 1605–1637?), English mariner and author
 * John Nicholl (judge) (1759–1838), Welsh MP for Penryn and judge
 * John Nicholl (antiquary) (1790-1871), English antiquary
 * John Iltyd Nicholl (1797–1853), Welsh MP for Cardiff and judge