Críchad an Chaoilli ("boundary of the Caoille") is a medieval Irish text.
Written in Middle Irish sometime between 1100 and 1300, Críchad an Chaoilli is a topographical text that takes its title from its opening verse: which translates as The rest of the text is written in prose, and describes the land and proprietors of Fermoy, County Cork, an area originally known as the kingdom of Caoille or Fir Maige Féne.
It survives in two manuscripts – Book of Lismore, on folio 140a, 2; and in Egerton 92, fo.
13b, preserved in the British Library, London.
Its unknown author is thought to have been a monastic scribe.