Newcastle (An Caislean Nua in Irish) is a town in County Down, Northern Ireland. The seaside resort lies on the Irish Sea coast and is known for its sandy beach, the Royal County Down golf course and the Route 66 Automobile Museum. The Mountains of Mourne lie south of the town and the local area includes the Tollymore Forest Park and Donard Park.
- See also Newcastle for other places with the same name.
