L
- (Mayo County) Liscottle
- (Mayo County) Lisnamaneeagh
- (Mayo County) Lecarrow
- (Mayo County) Lowpark
- (Mayo County) Loughapharbera
- (Mayo County) Lisbaun East
- (Mayo County) Larganboy West
- (Mayo County) Lurga Upper
- (Mayo County) Lavy More
- (Mayo County) Lavy Beg
- (Mayo County) Lurga Lower
- (Mayo County) Lurga Cross Roads
- (Mayo County) Lurga
- (Mayo County) Lecarrow
- (Mayo County) Lurgan
- (Mayo County) Lisnagross
- (Mayo County) Lurgan
- (Mayo County) Lismaganshion
- (Mayo County) Lismeegaun
- (Mayo County) Liscosker
- (Mayo County) Lisbaun West
- (Mayo County) Lissymulgee
- (Mayo County) Leveelick
- (Sligo) Lissard
- (Sligo) Lisconwy
- (Sligo) Lomcloon
- (Roscommon) Lung
- (Roscommon) Lissergool
- (Roscommon) Lissian
- (Roscommon) Lissacurkia