Martin Marty OSB (January 12, 1834 – September 19, 1896) was a Swiss-born Benedictine missionary and bishop in the United States. His birth name was James Joseph Alois Marty. Marty was the first abbot of St. Meinrad Monastery in Indiana, the first vicar apostolic of Dakota Territory, where he ministered to the Lakota Sioux; and the second bishop of the Roman Catholic Diocese of Saint Cloud. His zeal for the Native American missions earned him the title, "The Apostle of the Sioux".