Thomas Lyon
Thomas or Tom Lyon may refer to:
- Thomas Lyon (settler), English-born US settler
- Thomas Lyon, 8th Earl of Strathmore and Kinghorne, Scottish nobleman, peer, and politician
- Thomas Lyon (of Auldbar), Treasurer of Scotland
- Thomas Lyon (MP), Scottish politician and member of Parliament from Aberdeen Burghs
- Tom Lyon, British magician
- Tom Lyon (footballer), Scottish footballer
- T. Edgar Lyon, American educator and historian
- Thomas Lyttleton Lyon, professor of soil science at Cornell University