克努特四世（丹麦语：Knud IV ；约1042年－1086年7月10日），是1080年至1086年在位的丹麦国王。由于他在1101年被罗马天主教会封为圣人，后人有时称他为圣克努特（丹麦语：Knud Hellige或Sankt Knud）。克努特四世为斯文二世之子，他被取名为克努特，是为了纪念他的舅爷克努特二世。他继承了哥哥哈拉尔三世的王位，他是位虔诚的天主教徒，在位期间加强了王权，他想和他舅爷一样，成为英格兰国王，可是因为入侵英格兰失败后被杀，没能像克努特二世那样登上英格兰王位。死后，王位由兄弟奥拉夫一世继承。

Canute IV (c.1042 – 10 July 1086), later known as Canute the Holy (Danish:Knud IV den Hellige) or Saint Canute (Sankt Knud), was King of Denmark from 1080 until 1086. Canute was an ambitious king who sought to strengthen the Danish monarchy, devotedly supported the Roman Catholic Church, and had designs on the English throne. Slain by rebels in 1086, he was the first Danish king to be canonized. He was recognized by the Roman Catholic Church as patron saint of Denmark in 1101.