Algernon William John Clotworthy Skeffington, 12th Viscount Massereene and 5th Viscount Ferrard, DSO (28 November 1873 – 20 July 1956) was British Army officer and an Ulster Unionist member of the Senate of Northern Ireland from 1921 to 1929. During this period he served as Deputy Leader of the Senate and Parliamentary Secretary in the Department of the Prime Minister.