Haraldsson is a surname of Icelandic or Scandinavian origin, meaning son of Harald or son of Haraldur. In Icelandic names, the name is not strictly a surname, but a patronymic. The name refers to:
Godfrid Haraldsson (820–856), son of the Danish king Harald KlakGuttorm Haraldsson (fl. 10th century), son of king Harald Fairhair of NorwaySigvaldi Strut-Haraldsson (fl. 11th–12th century), chieftain of the JomsvikingsBjörn Ironside Haraldsson (fl. 12th century), Danish noble; father of Christina Bjornsdatter, a queen of SwedenErlend Haraldsson (fl. 12th century), Earl of Orkney 1151–54David Haraldsson (fl. 13th century), Earl of Orkney 1206–14Heinrik Haraldsson (fl. 13th century), Earl of Orkney 1206–31Jon Haraldsson (fl. 13th century), Earl of Orkney 1206–31Erlendur Haraldsson (contemporary), Icelandic academic; professor of psychology and philosophyDaníel Ágúst Haraldsson (born 1969), Icelandic pop singer