Ballagh may refer to:
- Faugh-a-Ballagh, a Thoroughbred race horse
- Faugh A Ballagh, a battle cry of Irish origin
- Oulart the Ballagh, a Gaelic Athletic Association club in County Wexford
- Robert Ballagh (born 1943), an Irish artist
- The Ballagh, a village in County Wexford, Ireland
- Ballagh, County Tyrone, a townland in County Tyrone, Northern Ireland