Cullybackey or Cullybacky (from Irish: Coill na Baice meaning "wood of the river bend") is a village in County Antrim, Northern Ireland. It lies 4 miles north of Ballymena, on the banks of the River Maine, and is within the Borough of Ballymena. It had a population of 2,405 people in the 2001 Census. It is a predominantly Protestant area with most of the residents being of Scottish descent.

Cullybackey was formed part of the ancient province of Dalaraida.

Evidence of ancient dwellers in the area have been found throughout the years, including the remains of Crannogs and Souterrains.

Christian Missionary Mackevet erected a monastery in the area. It is said that when Mackevet first approached the Irish Chieftain MacAfee about this matter the two began to argue over it and Mackevet, who was a large man raised his fist into the chieftains face and said "I'm a man of peace, but smell that MacAfee". This won him the argument and the monastery was built, supplying the area with a place of learning for many centuries afterwards.