Ballyduff may refer to several villages:
- In the Republic of Ireland
- Ballyduff, County Kerry
- Ballyduff, County Waterford near Lismore, County Waterford
- Ballyduff, County Wexford, located between Gorey and Ferns, County Wexford
- Ballyjamesduff, County Cavan, often called Ballyduff for short
- In Canada
- a community in Manvers Township, Ontario