Rathbaun, in County Mayo, contains the Irish word rath, meaning a ringfort, an enclosed circular settlement typically defined by one or more earthen banks and ditches, built during the early medieval period as a farmstead or place of local authority. The baun element likely derives from bán, meaning white or pale. So the site known as the Ringfort at Rathbaun is, in a sense, the ringfort at the ringfort, a name that has folded its own meaning back into itself over centuries of use and forgetting.

Ringforts are among the most numerous archaeological monument types in Ireland, with an estimated 40,000 or more recorded across the island, yet each one represents a specific act of enclosure, a family or community choosing a particular patch of ground and committing considerable labour to defining it. They date broadly from the early medieval period, roughly 500 to 1000 AD, though some were built earlier and others continued in use well beyond that window. The rath form, built from earthworks rather than stone, was typical across the midlands and west, and Mayo contains many such examples, scattered across farmland that has, in places, preserved their outlines simply because the ground was never worth ploughing flat. Beyond that general context, the particular history of this site, its dimensions, condition, any finds or associations attached to it, remains undocumented in publicly available sources at present.