Helen of Zadar (Croatian: Jelena) (died 8 October 976), also known as Helen the Glorious, was the queen consort of the Kingdom of Croatia, as the wife of King Michael Krešimir II, from 946 to 969, a period which was marked by "peace, order and expeditious growth". She became the queen dowager of Croatia after her husband and reigned until her death. She is said to have originated from the old patrician family Madi from Zadar.