Henry I of Carinthia was a medieval nobleman who ruled as Duke of Carinthia from 1122 until his death in 1126. He was a member of the House of Sponheim and played a significant role in the political landscape of the Holy Roman Empire. His reign was marked by efforts to strengthen the duchy and maintain its independence. Henry was the son of Henry of Sponheim and inherited the title after the death of his cousin, Bertold. His rule was characterized by conflicts with neighboring territories and the need to navigate the complex relationships among the various noble families of the time.