David Lyon
David Lyon may refer to:
- Dave Lyon (footballer, born 1948), English football forward
- Dave Lyon (footballer, born 1951), English football defender
- Dave Lyon (track coach), Canadian track and field coach
- David Lyon (actor), British actor
- David Lyon (cricketer), English cricketer
- David Lyon (designer), car designer
- David Lyon (rugby), English rugby league and rugby union player
- David Lyon (sociologist), professor of sociology at Queen's University, Kingston, Ontario
- David Lyon (British politician), West India merchant, Member of Parliament and landowner
- David Gordon Lyon, American theologian
- David Murray Lyon, British physician and medical author
- David Bowes-Lyon, brother of Elizabeth Bowes-Lyon, the Queen Mother
- David Murray-Lyon, officer in the Indian Army
- David Lyon (Nigerian politician), disqualified governor-elect of Bayelsa State