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- Lack Primary School, Lack, County Fermanagh
- Laghey Primary School, Killyman, County Tyrone
- Landhead Primary School, Ballymoney, County Antrim
- Larne and Inver Primary School, Larne, County Antrim
- Leadhill Primary School, Belfast/Castlereagh, County Antrim
- Leaney Primary School, Ballymoney, County Antrim
- Lisfearty Primary School, Dungannon, County Tyrone
- Linn Primary School, Larne, County Antrim
- Lisbellaw Primary School, Lisbellaw, County Fermanagh
- Lislagan Primary School, Ballymoney, County Antrim
- Lisnadill Primary School, Lisnadill, County Armagh
- Lisnagelvin Primary School, L'Derry, County Londonderry
- Lisnamurrican Primary School, Broughshane, County Antrim
- Lisnasharragh Primary School, Belfast, County Down
- Lissan Primary School, Cookstown, County Tyrone
- Loanends Primary School, Loanends, County Antrim
- Longstone Primary School, Ahoghill, County Antrim
- Lourdes Primary School, Whitehead, County Antrim
- Lurgan Model Primary School, Lurgan, County Armagh
Read more about this topic: List Of Primary Schools In Northern Ireland