Irmgard of Chiemsee was a 9th-century Benedictine abbess and a member of the Carolingian royal family. Born in Regensburg to King Louis the German and Queen Hemma, she was educated at the Buchau abbey in Swabia. In approximately 850, she was appointed to lead the Frauenwörth abbey, an imperial institution. During her tenure as the first abbess of this monastery, she oversaw the restoration of its buildings and transitioned the community into a Benedictine convent.