St Killian's College (Irish: Coláiste Naomh Cillian, colloquially known as Garron Tower) is an all-ability co-educational school that was formed by the amalgamation of three schools in the Larne and Ballymena area: St MacNissi's College, Garron Tower, St Comgall's College, Larne, and St Aloysius High School, Cushendall.