The Battle of Badon, also known as the Battle of Badon Hill or Mount Badon, is a battle thought to have occurred between a force of Britons and an Anglo-Saxon war band in the late 5th or early 6th century.

Chiefly known today for the supposed involvement of King Arthur, it is credited in medieval British and Welsh sources as a major political and military event but seems to have passed unremarked in the Anglo-Saxon histories.

Because of the limited number of sources, there is no certainty about the date, location, or details of the fighting.