Ballymena is a town in County Antrim, Northern Ireland. It had a population of 31,205 people at the 2021 census, making it the seventh largest town in Northern Ireland by population. It is part of the Borough of Mid and East Antrim. The town was built on the Braid River, on land given to the Adair family by King Charles I in 1626, with a right to hold two annual fairs and a Saturday market in perpetuity. Surrounding villages are Cullybackey, Ahoghill, Broughshane, and Kells-Connor.