The Battle of Brunanburh is an English victory in 937 by the army of Æthelstan, King of England, and his brother Edmund over the combined armies of Olaf III Guthfrithson, the Norse–Gael King of Dublin; Constantine II, King of Alba; and Owen I, King of Strathclyde.

The site of the battle is not known, though modern scholarship suggests that somewhere in the Wirral Peninsula is likely.Mention of the battle is made in dozens of sources, in Old English, Latin, Irish, Welsh, Icelandic, and Middle English, and there are many later accounts or responses to the battle, including those by Alfred, Lord Tennyson and Jorge Luis Borges.

A contemporary record of the battle is found in the Old English poem Battle of Brunanburh, preserved in the Anglo-Saxon Chronicle.