Rodulf Haraldsson (died June 873), sometimes Rudolf, from Old Norse Hróðulfr, was a Viking leader who raided the British Isles, West Francia, Frisia, and Lotharingia in the 860s and 870s. He was a son of Harald the Younger and thus a nephew of Rorik of Dorestad, and a relative of both Harald Klak and Godfrid Haraldsson, but he was "the black sheep of the family". He was baptised, but under what circumstances is unknown. His career is obscure, but similar accounts are found in the three major series of Reichsannalen from the period: the Annales Bertiniani from West Francia, the Annales Fuldenses from East Francia, and the Annales Xantenses from Middle Francia. He died in an unsuccessful attempt to impose a danegeld on the locals of the Ostergo.