Harald I

Harald I or Harold I may refer to:

• Harald Bluetooth (c. 935 – c. 985/986), king of Denmark and also Norway
• Harald Fairhair (c. 850 – c. 932), first king of Norway
• Harold Harefoot (c. 1016 – 1040), king of England
• Harald Olafsson (c. 1223 – 1248), king of Mann (or the Hebrides) and the Isles