- L’Estrange Bridge
- Lackagh
- Lackaghmore
- Lackan
- Lackan
- Lackareagh
- Lacken
- Lacken
- Lackey
- Lackmelch
- Ladestown
- Lady Island
- Lady’s Bridge
- Lady’s Island
- Ladyrath
- Ladytown
- Lakyle
- Lamberstown
- Lambstown
- Lanesborough
- Lanoge
- Laracor
- Laragh
- Laragh
- Laragh
- Laraheen
- Laraheenhill
- Larch Hill
- Larchville Commons
- Large Island