Thorkell the Tall (Old Norse: Þorke(ti)ll inn hávi) was a Danish warlord who prominently took part in battles in the late 10th and early 11th centuries. He was a son of the Scanian chieftain Strut-Harald, and a brother of Jarl Sigvaldi, Hemingr and Tófa.
In the autumn of 1016, the Danish prince Cnut the Great (Canute), supported by Eiríkr Hákonarson, and Thorkell the Tall successfully invaded England. Cnut's father, Sweyn Forkbeard, had previously conquered and briefly ruled England for less than five weeks.