Ballymena Borough Council was the local authority of Ballymena in Northern Ireland. It merged with Carrickfergus Borough Council and Larne Borough Council in May 2015 under local government reorganisation in Northern Ireland to become Mid and East Antrim Borough Council. The borough of Ballymena was created in 1973 from the merging of the former municipal borough of Ballymena with most of the surrounding Ballymena Rural District. The new council inherited the 1937 charter of incorporation of the municipal borough, continuing the borough status and mayoralty.