Edwin (Old English: Ēadwine; c. 586 – 12 October 632/633), also known as Eadwine or Æduinus, was the King of Deira and Bernicia – which later became known as Northumbria – from about 616 until his death. He converted to Christianity and was baptised in 627; after he fell at the Battle of Hatfield Chase, he was venerated as a saint.

Edwin was the son of Ælle, the first known king of Deira, and seems to have had at least two siblings. His sister Acha was married to Æthelfrith, king of neighbouring Bernicia. An otherwise unknown sibling fathered Hereric, who in turn fathered Abbess Hilda of Whitby and Hereswith, wife to Æthelric, the brother of king Anna of East Anglia.