Demetrius Zvonimir (, , , died 20 April 1089) was King of Croatia from 1075 until his death in 1089. He was crowned as king in Solin on 8 October 1076. Zvonimir also ruled as Ban of Slavonia (1064–1074), and was named Duke of Croatia in around 1075. His native name was Zvonimir, while the name Demetrius (Dmitar in Croatian) was adopted at his coronation.