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