Baron Glenarthur, of Carlung in the County of Ayr, is a title in the Peerage of the United Kingdom. It was created in 1918 for the Scottish businessman Sir Matthew Arthur, 1st Baronet. He had already been created a baronet, of Carlung in the County of Ayr, on 10 January 1903. The title of the barony was derived from the joining of his mother's maiden surname name of Glen and his patronymic Arthur.