Newcastle, County Down

Newcastle
Newcastle from the beach, with Slieve Donard in the background
Newcastle
Location within County Down
Population8,298 2021 Census
 Belfast32.5 miles (52.3 km)
District
County
CountryNorthern Ireland
Sovereign stateUnited Kingdom
Post townNEWCASTLE
Postcode districtBT33
Dialling code028
PoliceNorthern Ireland
FireNorthern Ireland
AmbulanceNorthern Ireland
UK Parliament
NI Assembly

Newcastle is a small seaside resort town in County Down, Northern Ireland, which had a population of 8,298 at the 2021 Census. It lies by the Irish Sea at the foot of Slieve Donard, the highest of the Mourne Mountains. Newcastle is known for its sandy beach, forests (Donard Forest and Tollymore Forest Park), and mountains. The town lies within the Newry, Mourne and Down District.

The town aims to promote itself as the "activity resort" for Northern Ireland. It has benefited from a multi-million pound upgrade to the promenade and main street. The town is twinned with New Ross, County Wexford, in the Republic of Ireland.