Nenagh (/niːˈnɑː/ or /ˈniːnə/, locally /ˈneɪnə/; Irish:Aonach Urmhumhan or simply An tAonach) is the county town and second largest town in County Tipperary in Ireland. It is a civil parish in the historical barony of Ormond Lower. It is also an Ecclesiastical parish in the Roman Catholic Diocese of Killaloe.