John Stewart of Ralston was a 14th—century Scottish noble.

He was a son of Walter Stewart, 6th High Steward of Scotland and Isabel Graham.

He was the half brother of King Robert II of Scotland.

[1] Captured during the Battle of Neville's Cross on 17 October 1346 and became a hostage for conduct of King David II of Scotland.

John married Alicia, daughter of Reginald de Mure and Sybilla de Graham, they are known to have had the following issue: