Castle Ward is an 18th-century National Trust property located near the village of Strangford, in County Down, Northern Ireland, in the townland of the same name. It overlooks Strangford Lough and is 7 miles from Downpatrick and 1.5 miles from Strangford.
Castle Ward is open to the public and includes 332 hectares of landscaped gardens, a fortified tower house, Victorian laundry, theatre, restaurant, shop, saw mill and a working corn mill. It has a shore on Strangford Lough. From 1985 to 2010 it has also hosted Castleward Opera, an annual summer opera festival.
