Harald II (or Harold II) may refer to:
Harald Greycloak of Norway (died 976) Harald II of Denmark (c. 980s – 1018) Harold Godwinson of England (c. 1022 – 1066) Harald Maddadsson, Earl of Orkney and Mormaer of Caithness (1139–1206) Harald II of Mann (r. 1249–1250), a.k.a. Aralt mac Gofraid