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- (Mayo County) Lightford
- (Mayo County) Lisgowel
- (Mayo County) Lakeland
- (Mayo County) Lissaniska
- (Mayo County) Lugnavaddoge
- (Mayo County) Lugganashiere
- (Mayo County) Lecarrow
- (Mayo County) Largan
- (Mayo County) Loona
- (Mayo County) Loughpark
- (Mayo County) Lugbrack
- (Mayo County) Lough Cloghvoley
- (Mayo County) Laralac
- (Mayo County) Lough Nasnadda
- (Mayo County) Lisduff
- (Mayo County) Lagcurragh
- (Mayo County) Lislackagh
- (Mayo County) Lissanumera
- (Mayo County) Listernan
- (Mayo County) Loobnamuck
- (Mayo County) Liscat
- (Mayo County) Lispatrick
- (Mayo County) Loughanboy
- (Mayo County) Lisdurraun
- (Mayo County) Lismoran
- (Mayo County) Lecarrow
- (Mayo County) Lisbrogan
- (Mayo County) Lisheenabrone
- (Mayo County) Lismiraun
- (Mayo County) Lisbaun