County Down (named after its county town, Downpatrick) is one of six counties that form Northern Ireland, situated in the northeast of the island of Ireland. Adjoined to the southeast shore of Lough Neagh, the county covers an area of 2,448 km² (945 sq mi) and has a population of about 531,665. It is also one of the thirty-two traditional counties of Ireland and is within the province of Ulster.