Walter Stewart, 3rd High Steward of Scotland

Walter Stewart of Dundonald (c. 1180–1246) was the third hereditary High Steward of Scotland and Justiciar of Scotia. The eldest son of Alan fitz Walter, he was the first of his line to use Stewart as a family name.

As seneschal and justiciar he witnessed charters of Alexander II, and around 1213 gave timber for Paisley Priory. By his wife Beatrix, daughter of the Earl of Angus, he fathered Alexander Stewart, the fourth High Steward, and died in 1246.