Castles in the Republic of Ireland is a link page for any castle in the Republic of Ireland.

See: List of castles, Castles in the United Kingdom, Abbeys and priories in the Republic of Ireland, Historic houses in the Republic of Ireland, Conservation in the Republic of Ireland

County Clare

• Bunratty Castle
• Doonagore Castle
• Dysert O'Dea Castle
• Knappogue Castle
• Leamaneagh Castle

County Cork

• Blackrock Castle
• Blarney Castle
• Carrignacurra Castle
• Desmond Castle , Kinsale

County Donegal

• Donegal Castle
• Glenveagh Castle
• Greencastle

County Dublin

• Dublin Castle
• Howth Castle
• Malahide Castle

County Galway

• Aughnanure Castle
• Dunguaire Castle
• Lynch's Castle
• Portumna Castle

County Kerry

• Ross Castle

County Kilkenny

• Foulksrath Castle
• Kilkenny Castle

County Limerick

• Black Castle
• Bourchier's Castle
• Castle Matrix
• Desmond Castle
• Glin Castle
• King John's Castle

County Louth

• Slane Castle

County Meath

• Slane Castle
• Trim Castle

County Offaly

• Birr Castle

County Roscommon

• Roscommon Castle

County Sligo

• Parke's Castle

County Tipperary

• Cahir Castle
• Ormond Castle
• Roscrea Castle
• Shanbally Castle

County Waterford

• Lismore Castle

County Westmeath

• Athlone Castle

County Wexford

• Ballyhack Castle
• Enniscorthy Castle
• Johnstown Castle
• Rathlannon Castle