Oswine of Deira was a 7th-century sovereign of the Deiran kingdom in northern England. Following the death of King Oswald, Oswine ascended to the throne, an event that resulted in the division of Northumbria. After ruling peacefully for seven years, he faced military opposition from Oswiu. Seeking refuge with a trusted friend, Earl Hunwald, Oswine was instead betrayed and killed by soldiers under the command of Ethilwin. His death occurred in 651, likely at a location identified as Diddersley Hill.