John Nicholas
John Nicholas may refer to:
- John Nicholas (academic), English academic administrator at the University of Oxford
- John Nicholas (congressman), American politician
- John Nicholas (footballer), British footballer
- John Nicholas (ice hockey), Australian ice hockey player
- Johnny Nicholas, blues musician
- John Nicholas (judge), judge of the Federal Court of Australia
- John Nicholas (Devizes MP), Member of Parliament for Devizes 1713–1715
- Sir John Nicholas (1624–1705), MP for Ripon 1661–1679, for Wilton
- John Nicholas (of Chepstow), English soldier and politician
- Sir John Nicholas (diplomat), British civil servant and diplomat