Powerscourt may refer to:
- Viscount Powerscourt, title in the Irish peerage
- Powerscourt Estate, County Wicklow, Ireland
- Powerscourt Golf Club, on the estate
- Powerscourt Waterfall, the highest waterfall in Ireland, near the estate
- Francis Powerscourt, fictional detective
- Powerscourt cocktail, a brandy-based cocktail created by Joe Gilmore for Sarah, Duchess of York