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- (Mayo County) Liscunnell
- (Mayo County) Lisnaponra
- (Mayo County) Lenanasillagh
- (Mayo County) Low Island
- (Mayo County) Lough Naminnoo
- (Mayo County) Lakill
- (Mayo County) Lecarrow
- (Mayo County) Lappallagh
- (Mayo County) Lissaniska
- (Mayo County) Lisblowick
- (Mayo County) Laghloon
- (Mayo County) Lismolin
- (Mayo County) Lugaphuill
- (Mayo County) Letterkeeghaun
- (Mayo County) Lisnageeha
- (Mayo County) Longfield
- (Mayo County) Loosky Island
- (Mayo County) Lisgormin
- (Mayo County) Lisduff
- (Mayo County) Lisclovaun
- (Mayo County) Lugnafahy
- (Mayo County) Levallinree
- (Mayo County) Larganmore
- (Mayo County) Lugrevagh
- (Mayo County) Lissalackaun
- (Mayo County) Legaun
- (Mayo County) Lagnamuck
- (Mayo County) Lisnolan
- (Mayo County) Lagaturrin
- (Mayo County) Lecarrow