John Lyon, 3rd Lord of Glamis (1431 – 1 April 1497) was a Scottish nobleman.
Born in Angus, he was the second son of Patrick Lyon, 1st Lord Glamis, and inherited the title on his brother's death in 1486.
[1] He was active in royal service during the early reign of James IV of Scotland, and was appointed justiciar north of Forth.
[1] The eldest, John Lyon, succeeded his father as Lord Glamis.
The three younger sons: David Lyon of Cossins, William and George, were killed at the Battle of Flodden in 1513.