L
- (Kerry) Lyre
- (Kerry) Lyre
- (County Cork) Lyre
- (County Cork) Lyre
- (County Waterford) Lyrattin
- (Kerry) Lyracrumpane
- (County Cork) Low Island
- (County Cork) Lowertown
- (County Tipperary) Loughmoe
- (County Cork) Loughane
- (County Tipperary) Losset
- (County Waterford) Loskeran
- (County Tipperary) Lorrha
- (County Cork) Longueville
- (County Cork) Long Island
- (County Cork) Lombardstown
- (Kerry) Loghill
- (County Cork) Little Island
- (Kerry) Listry Bridge
- (Kerry) Listellick
- (Kerry) Lisselton
- (Kerry) Lissataggle
- (County Cork) Lissaphooca Cross Roads
- (Clare) Lisroe
- (Kerry) Lispole
- (County Cork) Lispatrick
- (Kerry) Lisnakealwee
- (County Waterford) Lismore
- (County Cork) Lislevane
- (Kerry) Lisheen