William Mackay Mackenzie (1871–1952) was a Scottish historian, archaeologist and writer, who was Secretary of the Royal Commission on Ancient and Historical Monuments of Scotland between 1913 and 1935, and also an expert on folk-lore. He was born in Cromarty, graduated with an MA from the University of Edinburgh and taught at Glasgow Academy between 1896 and 1912. He also had a DLitt.