Leo Haid, O.S.B., (July 15, 1849 – July 24, 1924) was an American Benedictine abbot and Catholic bishop, who ruled as the Territorial Abbot of the Abbey of Mary Help of Christians, in Belmont, North Carolina, from 1885 to 1924 and as Vicar Apostolic of North Carolina from 1888 to 1910 and Territorial Abbot from 1910 to 1924.