Æthelberht (or Ethelbert; Old English: Æþelberht, meaning "magnificent noble") is the King of Kent from 858 and of Wessex from 860 to until his death in 865.
He is the third son of Æthelwulf of Wessex and his first wife, Osburh.
In 855 he becomes under-king of Kent while his father, Æthelwulf, visits Rome.
His brother Æthelbald is left in charge of the West Saxons.
After his father's death in 858 he succeeds him as king of Kent and the other eastern parts of the kingdom.
When Æthelbald dies childless in 860, the kingship of the West Saxons also passes to Æthelberht.
