Rathdown may refer to: Rathdown (County Dublin barony) an Irish administrative barony which gives its name to: Dublin Rathdown, a Dáil constituency Dún Laoghaire–Rathdown, a county in Ireland Baron Rathdown, a title in the Peerage of Ireland Rathdown, County Wicklow, an Irish administrative barony
Similar spelling Rathdowney, County Laois, Ireland Rathowen, County Westmeath, Ireland