William Boyd Stewart (July 27, 1835 in Haddam, Dumfrieshire, Scotland – March 5, 1912 in Toronto) was a pastor, writer, and educator in the Baptist denomination of Canada.
Together they had four daughters: Stewart studied at the Annan Academy and later at the University of Glasgow in his native Scotland.
Stewart re-entered the ministry at First Baptist Church Brantford, Ontario beginning August 1863 to May, 1869.
Stewart served as Interim Pastor at Parliament Street Baptist Church from the fall of 1893-early 1894.
William Stewart taught high school shortly after his arrival in Canada.