County Down in the province of Ulster is one of the six counties that make up Northern Ireland. It covers an area of 2,448 square kilometres and has a population of 531,665.
It shares borders with Co. Antrim to the north and Co. Armagh to the west. On its eastern side is the Irish Sea while the south-west faces Carlingford Lough.
Strangford Lough and the Ards Peninsula make up the east side of the county. The largest city is Newry while the largest town is Bangor on the north-east coastline. Both Belfast and Lisburn lie on the border between Co. Down and Co. Antrim.
The county contains Northern Ireland’s most southern point at Cranfield Point. Burr Point, also in the county, is the easternmost point of the country.
The county takes its name from dún, the Irish word for a fort. That fort was at the historic town of Downpatrick.