Æthelred (; ) or Ethelred () is an Old English personal name (a compound of æþele and ræd, meaning "noble counsel" or "well-advised") and may refer to:
Anglo-Saxon England Æthelred and Æthelberht, legendary princes of Kent Æthelred of Mercia (fl. 645–709), King of Mercia Æthelred I (disambiguation), several kings Æthelred II (disambiguation), several kings Æthelred Mucel (fl. 840–895), father of King Alfred the Great's wife, Ealhswith Æthelred (archbishop) (fl. 870–888), Archbishop of Canterbury Æthelred, Lord of the Mercians (fl. 881–911) Æthelred of Cornwall (fl. 1001), Bishop of Cornwall Æthelred the Unready (978–1016), King of England
Post-Conquest Ethelred of Scotland (fl. 1093), son of Malcolm III and Saint Margaret Aelred of Rievaulx (1110–1167), English writer, saint and abbot of Rievaulx Ethelred Taunton (1857–1907), English Roman Catholic priest and historical writer Aethelred Eldridge (1930–2018), American academic and painter
See also Ethelreda (given name)