- Lanesborough
- Legan
- Leggah
- Lisryan
- Larchville Commons
- Leighlinbridge
- Lemonstown Cross Roads
- Lissalican
- Lorum
- Lucas Bridge
- Lower Clanbrassil
- Leopardstown
- Loughlinstown
- Lidoville
- Lispapple Cross Roads
- Loughshinny
- Lusk
- Luttrell’s Cross Roads
- Luttrellstown
- Lackagh
- Lackaghmore
- Lackareagh
- Ladytown
- Laragh
- Larch Hill
- Larkfield
- Leinster Bridge
- Limerick Bridge
- Lipstown
- Littletown