Duhallow (Irish: Dúiche Ealla) is a barony located in the north-western part of County Cork, Ireland.

Baronies were created after the Norman invasion of Ireland as divisions of Irish counties and used in the administration of justice and the raising of revenue.

[citation needed] In some cases, a barony may correspond to an earlier Gaelic túath which had submitted to the Crown.

[citation needed] Duhallow is located on the borders of counties Kerry and Limerick, and is bounded on the south by the Boggeragh Mountains.

The main towns in Duhallow are Newmarket, Kanturk, and Millstreet, with smaller villages such as Ballydesmond, Banteer, Lyre, Kilcorney, Nadd, Boherbue, Castlemagner, Cullen, Kiskeam, Kilbrin, Knocknagree, Lismire, Meelin, Freemount, Rockchapel and Rathcoole.