Æthelred I (disambiguation)
# Æthelred I (disambiguation)

Æthelred I or Ethelred I may refer to:

* Æthelred I of Wessex, King of Wessex from 865 to 871
* Æthelred I of Northumbria, King of Northumbria from 774 to 779 and again from 788 or 789 until his murder in 796
* Æthelred I of East Anglia, King of East Anglia
