- Longstone
- Lorrha
- Losset
- Loughacutteen
- Loughcapple Bridge
- Loughkeen
- Loughkent House
- Loughmoe
- Loughtally
- Luska
- Labbanacallee
- Lackandarra
- Lackandarra Upper
- Lagnagoushee
- Lemybrien
- Leperstown
- Lickoran
- Licky Bridge
- Lickybeg
- Liskeety
- Lismore
- Lisnageragh
- Lisnakill
- Lisnakill Cross
- Lisscrow
- Lisselan
- Logleagh
- Lombard’s Cross Roads
- Loskeran
- Lowry’s Bridge