Rathdown

Rathdown may refer to:
 * Rathdown (County Dublin barony) an Irish administrative barony which gives its name to:
 * Dublin Rathdown (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