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)