Beonna (also known as Beorna) was King of East Anglia from 749. He is notable for being the first East Anglian king whose coinage included both the ruler's name and his title. The end-date of Beonna's reign is not known, but may have been around 760. It is thought that he shared the kingdom with another ruler called Alberht and possibly with a third man, named Hun. Not all experts agree with these regnal dates, or the nature of his kingship: it has been suggested that he may have ruled alone (and free of Mercian domination) from around 758.

Little is known of Beonna's life or his reign, as nothing in written form has survived from this period of East Anglian history. The very few primary sources for Beonna consist of bare references to his accession or rule written by late chroniclers, that until quite recently were impossible to verify. Since 1980, a sufficient number of coins have been found to show that he was indeed a historical figure. They have allowed scholars to make deductions about economic and linguistic links that existed between East Anglia and other parts of both England and northern Europe during his reign, as well as aspects of his own identity and rule.