- Leaha Bridge
- Leamnaguila
- Leanamore
- Leanevglissane
- Leansaghane
- Leath
- Leitim East
- Leitrim Middle
- Lerrig
- Letter
- Letter East
- Letterdunane
- Letterfinish
- Lettergarriv
- Letternadarriv
- Liberty Hall
- Limateerha
- Lisbabe
- Lisdargan
- Lisduff
- Lisheen
- Lisladraun
- Lisnagoneeny
- Lisnakealwee
- Lisnarahardia
- Lispole
- Lissataggle
- Lissatinnig Bridge
- Lisselton
- Lisselton Cross Roads