This is a list of all 67 grammar schools operating in Northern Ireland.

A

• Abbey Christian Brothers Grammar School, Newry, County Down
• Antrim Grammar School, Antrim, County Antrim
• Aquinas Diocesan Grammar School, Belfast
• Assumption Grammar School, Ballynahinch, County Down

B

• Ballyclare High School, Ballyclare, County Antrim
• Ballymena Academy, Ballymena, County Antrim
• Banbridge Academy, Banbridge, County Down
• Bangor Grammar School, Bangor, County Down
• Belfast High School, Newtownabbey, County Antrim
• Belfast Royal Academy, Belfast
• Bloomfield Collegiate School, Belfast

C

• Cambridge House Grammar School, Ballymena, County Antrim
• Campbell College, Belfast
• Carrickfergus Grammar School, Carrickfergus, County Antrim
• Christian Brothers' Grammar School, Omagh, County Tyrone
• Coleraine Grammar School, Coleraine, County Londonderry

D

• Dalriada School, Ballymoney, County Antrim
• Dominican College, Portstewart, County Londonderry
• Dominican College, Fortwilliam, Belfast
• Down High School, Downpatrick, County Down

E

• Enniskillen Royal Grammar School, Enniskillen, County Fermanagh

F

• Foyle College, Derry
• Friends' School, Lisburn, County Antrim

G

• Glenlola Collegiate School, Bangor, County Down
• Grosvenor Grammar School, Belfast

H

• Hunterhouse College, Belfast

L

• Larne Grammar School, Larne, County Antrim
• Limavady Grammar School, Limavady, County Londonderry
• Loreto College, Coleraine, County Londonderry
• Loreto Grammar School, Omagh, County Tyrone
• Lumen Christi College, Derry
• Lurgan College, Lurgan, County Armagh

M

• Methodist College, Belfast
• Mount Lourdes Grammar School, Enniskillen, County Fermanagh

O

• Omagh Academy, Omagh, County Tyrone
• Our Lady and St Patrick's College, Knock, Belfast
• Our Lady's Grammar School, Newry, County Down

P

• Portadown College, Portadown, County Armagh

R

• Rainey Endowed School, Magherafelt, County Londonderry
• Rathmore Grammar School, Belfast
• Regent House School, Newtownards, County Down
• Royal Belfast Academical Institution, Belfast
• Royal School, Armagh, Armagh
• Royal School Dungannon, Dungannon, County Tyrone

S

• Sacred Heart Grammar School, Newry, County Down
• St Colman's College, Newry, County Down
• St Columb's College, Derry
• St. Dominic's High School, Belfast
• St Joseph's Grammar School, Donaghmore, County Tyrone
• St Louis Grammar School, Ballymena, Ballymena, County Antrim
• St Louis Grammar School, Kilkeel, Kilkeel, County Down
• St Malachy's College, Belfast
• St Mary's Christian Brothers Grammar School, Belfast
• St Mary's Grammar School, Magherafelt, County Londonderry
• St Michael's College, Enniskillen, County Fermanagh
• St Patrick's Academy, Dungannon, County Tyrone
• St Patrick's Grammar School, Armagh
• St Patrick's Grammar School, Downpatrick, Downpatrick, County Down
• Strabane Academy, Strabane, County Tyrone
• Strathearn School, Belfast
• Sullivan Upper School, Holywood, County Down

T

• Thornhill College, Derry

V

• Victoria College, Belfast

W

• Wallace High School, Lisburn, County Antrim
• Wellington College Belfast, Belfast