K
- (Mayo County) Killeennashask
- (Mayo County) Killeen
- (Mayo County) Knockboha
- (Mayo County) Killogeary
- (Mayo County) Killogunra
- (Mayo County) Knockduff
- (Mayo County) Knockanelo
- (Mayo County) Keel West
- (County Galway) Kilkerrin
- (County Leitrim) Killargue
- (Roscommon) Keadue
- (Mayo County) Kilcommon
- (Mayo County) Keem
- (Mayo County) Kell East
- (Mayo County) Kilmaine
- (Roscommon) Keadew
- (County Leitrim) Kiltyclogher
- (Roscommon) Knockvicar
- (County Galway) Kilronan
- (County Galway) Killimor
- (Roscommon) Knockcroghery
- (Mayo County) Kilkelly
- (Mayo County) Killala
- (Mayo County) Knocknalower
- (County Galway) Kinvarra
- (County Galway) Kilconnell
- (Mayo County) Knock
- (County Leitrim) Kinlough
- (Mayo County) Kiltamagh