John Nichol
John Nichol may refer to:
- John Pringle Nichol, Scottish scientist; mentor to William Thomson
- John Nichol , Scottish biographer
- John Nichol , English footballer
- John Nichol , RAF navigator shot down and taken prisoner during the first Gulf War
- John Lang Nichol, Canadian Senator
- John Nichol, fictional character from DC Comics going by the alias of Doctor Polaris