A cantred was a subdivision of a county in the Anglo-Norman Lordship of Ireland between the 13th and 15th centuries, analogous to the cantref of Wales or the hundred of England. In County Dublin the equivalent unit was termed a serjeanty, while in County Meath and environs it was a barony. The area of a cantred usually corresponded to that of an earlier trícha cét of Gaelic Ireland, and sometimes to that of a rural deanery in the medieval Irish church. Paul Mac Cotter has "demonstrated the existence of 151 certain cantreds and indicated the probable existence of a further 34." Cantreds were replaced by baronies from the 16th century.
In the Anglo-Norman shires and liberties, the cantred was originally a unit of subinfeudation; a magnate or tenant-in-chief who received a grant from the King of England as Lord of Ireland would typically grant a cantred or half-cantred to a baron as mesne lord, who would hold the chief manor and grant sub-manors to his tenants. Church land within a cantred was excluded from grants. Unlike a knight's fee, there was no military service in the feudal duties of a cantred.
The cantred was used for administrative purposes, with the serjeanty for law enforcement, the eyre for law courts, and collection of scutage and other taxes organised by cantred.