L
- (Sligo) Luffertan
- (Sligo) Lecarrow
- (Sligo) Lisnalurg
- (Sligo) Lisduff
- (Sligo) Lurgan
- (Sligo) Lisdoogan
- (Sligo) Lugacaha
- (Sligo) Lecarrow
- (Sligo) Leitrim North
- (Sligo) Leitrim South
- (Sligo) Lackagh
- (Sligo) Loughanelteen
- (Sligo) Lavally
- (Sligo) Lissergloon
- (Sligo) Lurgan
- (Sligo) Lisbanagher
- (Sligo) Lillybrook
- (Sligo) Lissycoyne
- (County Leitrim) Leamaskally
- (County Leitrim) Leckaun
- (Roscommon) Lisseevin
- (Roscommon) Lurraga
- (Roscommon) Lyonstown
- (County Leitrim) Lugalustran
- (County Leitrim) Lisgavneen
- (County Leitrim) Lurganboy
- (Sligo) Lugnadeffa
- (County Galway) Looscaun
- (Roscommon) Long Island
- (Mayo County) Lissaniska