Saintfield is a village and civil parish in County Down, Northern Ireland. It is about halfway between Belfast and Downpatrick on the A7 road. It had a population of 3,588 in the 2021 Census, made up mostly of commuters working in both south and central Belfast, which is about 18 km away. The population of the surrounding countryside is mostly involved in farming.

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.