The Prince of Carbery (Irish: Rí Mór Túath Chairbreach) is the traditional designation used by the head of the MacCarthy Reagh dynasty, a historic Gaelic-Irish ruling family based in what is now West Cork, Ireland. The title derives from the medieval lordship and later principality of Carbery, which emerged following the fragmentation of the Kingdom of Desmond in the 13th century.

It was established in 1281 for Donal Maol MacCarthy, the 2nd Lord of Carbery, after a treaty settlement with