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