Muskerry East (Irish: Múscraí Thoir )is one of the baronies of Ireland, an historical geographical unit of land. Its chief town is Ballincollig. It is one of 24 baronies in the county of Cork. It may also be viewed as a half barony because some time before the 1821 census data, it was divided from its other half - Muskerry West. Other neighbouring baronies include Cork to the east (surrounding the city of Cork), Duhallow to the north (whose chief town is Newmarket) and the barony of Barretts to the north-east.