Walter Stewart was a 15th-century churchman in the Kingdom of Scotland. He was a cousin of King James II of Scotland, being like King James a grandson to King Robert III of Scotland; Walter went to university and obtained a Master of Arts. He is found as Archdeacon of Dunblane in a document dating to 12 February 1433; it is not known when he had obtained this office, and because the latest known occupation of the office by any predecessor goes back all the way to 1410 x 1411, it cannot be narrowed down significantly. Walter was still Archdeacon of Dunblane on 3 November 1456 but had given it up the following year for the St Andrews archdeaconry. During his period as Archdeacon of Dunblane he was elected, following the death of Bishop Michael Ochiltree, as Bishop of Dunblane by the cathedral chapter. His election by the cathedral chapter of the see in 1447 turned out to be fruitless; Robert Lauder had been provided by the Pope in October, and by 29 November Walter has surrendered his rights to the bishopric.