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- Keady Primary School, Keady, County Armagh
- Kells and Connor Primary School, Kells, County Antrim
- Kilbride Central Primary School, Kilbride, County Antrim
- Kilbroney Primary School, Rostrevor, County Down
- Kilcoan Primary School, Islandmagee, County Antrim
- Kilkeel Primary School, Kilkeel, County Down
- Killean Primary School, Newry, County Down
- Killinchy Primary School, Killinchy, County Down
- Killowen Primary School, Coleraine, County Londonderry
- Killowen Primary School, Killowen, County Down
- Killylea Primary School, Killylea, County Armagh
- Killyman Primary School, Dungannon, County Tyrone
- Kilmoyle Primary School, Ballymoney, County Antrim
- Kilrea Primary School, Kilrea, County Londonderry
- Kilross Primary School, Tobermore, County Londonderry
- King's Park Primary School, Lurgan, County Armagh
- King's Park Primary School, Newtownabbey, County Antrim
- Kingsmills Primary School, Whitecross, County Armagh
- Kirkinriola Primary School, Ballymena, County Antrim
- Knockahollet Primary School, Dunloy, County Antrim
- Knockloughrim Primary School, Knockcloghrim, County Londonderry
- Knocknagin Primary School, Desertmartin, County Londonderry
Read more about this topic: List Of Primary Schools In Northern Ireland