- Lackagh
- Ladytown
- Laghy
- Lahardaun
- Lahinch
- Lanesborough
- Laragh
- Larganreagh
- Lawcus
- Laytown
- Leap
- Legan
- Leighlinbridge
- Leitrim
- Leixlip
- Lemybrien
- Letterfrack
- Letterkenny
- Lifford
- Limerick
- Liscannor
- Liscarroll
- Lisdoonvarna
- Lisronagh
- Lissycasey
- Listowel
- Little Bray
- Littleton
- Lixnaw
- Longford
- Longwood
- Lough Gowna
- Loughanure
- Loughfad Hill
- Loughglinn
- Loughlinstown
- Loughrea
- Loughshinny
- Louisburgh
- Louth
- Lucan
- Lusk
- Lyre
