Æthelweard (died 854) was a 9th-century king of East Anglia, the long-lived Anglo-Saxon kingdom which today includes the English counties of Norfolk and Suffolk.

Prior to the arrival of the Vikings, the 6th century Kingdom of the East Angles was rich and powerful, with a distinctive ecclesiastical culture.

Between this time and the early Norman period, practically nothing is known of the history of East Anglia, except that the kingdom was rich and powerful enough to remain independent.

[1] According to the historian Barbara Yorke, Viking attacks eventually destroyed all the East Anglian monasteries, where books and charters would have been kept.

However, numismatic evidence in the form of surviving coinage suggests that he was the ruler of an independent kingdom and not subject to Mercia or Wessex.