Moira is a village and civil parish in County Down, Northern Ireland. It is in the northwest of the county, near the border with counties Antrim and Armagh. The M1 motorway and Belfast–Dublin railway line are nearby. The population was 4,591 at the 2011 Census.

County Down is one of the six counties of Northern Ireland, one of the nine counties of Ulster and one of the traditional thirty-two counties of Ireland. It covers an area of 961 sq mi (2,490 km2) and has a population of 552,261. It borders County Antrim to the north, the Irish Sea to the east, County Armagh to the west, and County Louth across Carlingford Lough to the southwest.