Ulrich I, of the House of Sponheim, was the Duke of Carinthia and Margrave of Verona from 1135 until his death. He was the eldest son of Duke Engelbert and Uta, daughter of Burggrave Ulrich of Passau, his namesake. His father abdicated in 1135 and Ulrich was appointed his successor by the Emperor Lothair II at an imperial diet being held in Bamberg.