Aelfwine (c. 661 - 679) was a King of Deira (670 - 679). He was a son of Oswiu of Northumbria and a brother of Ecgfrith of Northumbria.
After the succession of Ecgfrith as king of Northumbria in 670, he made Aelfwine king of the sub-kingdom of Deira. Aelfwine was still a boy at the time, and the title may have been intended to designate him as the heir of the childless Ecgfrith. He was, however, killed in battle against the Mercians at the river Trent in 679. This provoked the outrage of the Northumbrians, but further conflict was averted by the intervention of the Archbishop of Canterbury, Theodore, who persuaded Aethelred of Mercia to pay a weregild in compensation for Aelfwine's death.
