Ardagh (Ardachadh or Ard-achadh, meaning "high field" in Irish; modern Irish: Ardach) may refer to:
Places on the island of Ireland Ardagh, County Antrim, a townland Ardagh, County Cork, a townland; see List of townlands of the barony of Bear Ardagh, County Donegal, a townland Ardagh, County Limerick, a village and parish Ardagh, County Londonderry, a townland; see List of townlands of County Londonderry Ardagh, County Longford, a village Ardagh (barony), containing the village Ardagh, County Mayo, a parish and townland Ardagh, County Sligo; see List of townlands of County Sligo
Other uses Ardagh (surname), with a list of people with this surname Ardagh GAA, Gaelic football club in County Mayo, Ireland Ardagh Group, based in Luxembourg, produces metal and glass packaging Ardagh railway station, served the Limerick village
Dioceses Diocese of Kilmore, Elphin and Ardagh, in the Church of Ireland province of Armagh Roman Catholic Diocese of Ardagh and Clonmacnoise, in the province of Armagh, Ireland
See also Ardagh Castle Cheese, a small cheese producer in Ireland Ardagh–Johnson Line, a boundary of Kashmir determined by the British Ardagh Fort, ancient rath near the Limerick village Ardagh Hoard, that includes the Ardagh Chalice, from the fort