- Laraheen
- Laraheenhill
- Larken
- Larkins Cross Roads
- Lewistown
- Limerick
- Linnanagh
- Little Saltee
- Loberduff Bridge
- Loggan Bridge
- Loggan Lower
- Lookout
- Louggraigue House
- Lough
- Loughnageer
- Lyrane
- Lackan
- Laragh
- Laragh
- Leabeg
- Lockstown Lower
- Lockstown Upper
- Logatrina
- Lowtown
- Lugduff
- Lugglass Lower
- Lugglass Upper
- Lugnagun Great
- Lugnaskeagh
- Lumecloon