Patrick Lyon, 1st Lord Glamis (1402 – 21 March 1459) P.C.
was a Scottish nobleman, created Lord Glamis on 28 June 1445.
He was a son of Sir John Lyon of Glamis (c. 1377 – c. 1435) and Elizabeth Graham, daughter of Sir Patrick Graham of Dundaff and Kincardine and Euphemia Stewart, Countess of Strathearn.
Sir John was the son of Sir John Lyon (d. 1382) and Princess Joanna Stewart, daughter of Robert II of Scotland.
Late in 1427 or soon thereafter he married Isabel, daughter of Sir Walter Ogilvie of Lintrethan, Treasurer of Scotland.