Harald II of Denmark (died 1018) was King of Denmark from 1014 until his death in 1018. He was the eldest son of Sweyn Forkbeard and Gunhild of Wenden, and was regent while his father was fighting Ethelred the Unready in England. He inherited the Danish throne in 1014, and held it while his brother, the later king Cnut the Great conquered England.
After his death in 1018, he was succeeded by Cnut the Great. Little detail is known about Harald II.