A
- Abbey Christian Brothers Grammar school, Lurgan
- Ardscoil Naomh Maolmhaodhóg (Sruth), Irish-medium school, Castlewellan, County Down
- Ashfield Boys' High School, Belfast
- Ashfield Girls' High School, Belfast
- Aughnacloy College, Aughnacloy, County Tyrone
Read more about this topic: List Of Secondary Schools In Northern Ireland