Mary Cranston Mason (1846–1932) was a Scottish hotelier, social reformer, and temperance leader.
She was a daughter of Bailie Robert Cranston (1815–1892), of Edinburgh, who was one of the temperance pioneers of Scotland, and his first wife, Elizabeth Dalgleish.
[1][4] Born in the atmosphere of total abstinence and of organized opposition to the liquor traffic, Mason came by inheritance into those convictions and activities which led the Scottish women into a concerted temperance movement.
Under the auspices of the Auxiliary, social meetings were held in the schools every winter that included instructive programs regarding the ill-effects of alcohol use.
With Mason at its head, the Auxiliary took an active part in all the local and national movements by which Scotland participated in temperance reform.