The site sits on a south-facing slope currently in tillage, and what remains is a slightly raised circular area measuring roughly 20.6 metres north to south and 20.8 metres east to west, making it a modest but reasonably complete example of its type.

Ringforts, sometimes called raths, are the most numerous monument type in the Irish landscape, with tens of thousands recorded across the island. They are generally understood as enclosed farmsteads of the early medieval period, roughly the fifth to twelfth centuries, where a family and their livestock would have lived within a raised earthen bank. The enclosing bank itself has not survived prominently at Moneynacroha, but the fosse, the external ditch that would originally have reinforced the enclosure, can still be traced as a shallow depression curving around the north-west and eastern sides. A fosse of this kind was dug to provide material for the internal bank and to add a further obstacle to anyone approaching from outside. That it survives at all, even faintly, in a field under regular cultivation is a small piece of good fortune.