Ernest, Duke of Saxe-Hildburghausen (12 June 1655 in Gotha – 17 October 1715 in Hildburghausen) was a duke of Saxe-Hildburghausen. He was the ninth but sixth surviving son of Ernest I, Duke of Saxe-Gotha and Elisabeth Sophie of Saxe-Altenburg. Ernest settled his official residence in Hildburghausen and began the building of his castle. In 1710 he approved the building in his lands of a new city of French Huguenot families, who were driven out after the Edict of Nantes from France.