Ælfwald I (born between 759 and 767 AD) was king of Northumbria from 779 to 788.
He is thought to have been a son of Oswulf, and thus a grandson of Eadberht Eating.
Ælfwald became king after Æthelred son of Æthelwald Moll was deposed in 778.
Ælfwald was succeeded by his first cousin Osred,[2] son of Alhred and Osgifu, daughter of Eadberht Eating.
Ælfwald's sons Ælf and Ælfwine were killed in 791 on the orders of King Æthelred.