Cullybackey or Cullybacky is a large village in County Antrim, Northern Ireland. It lies 3 miles north-west of Ballymena, on the banks of the River Main, and is part of Mid and East Antrim district. It had a population of 2,569 people in the 2011 Census.

County Antrim is one of the six counties of Northern Ireland, located within the historic province of Ulster. Adjoined to the north-east shore of Lough Neagh, the county covers an area of 3,086 square kilometres (1,192 sq mi) and has a population of 651,321, as of the 2021 census. County Antrim has a population density of 211 people per square kilometre or 546 people per square mile. It is also one of the thirty-two traditional counties of Ireland.