K
- (Mayo County) Kid Island East
- (Mayo County) Knockboy
- (Mayo County) Knockglass
- (Mayo County) Knockbreaga
- (Mayo County) Keeloges
- (Mayo County) Knockalegan
- (Mayo County) Knockmoyleen
- (Mayo County) Kinturk
- (Mayo County) Killaghwaun
- (Mayo County) Knockbrack
- (Mayo County) Knockmoyle
- (Mayo County) Knockglass
- (Mayo County) Killawullaun
- (Mayo County) Knockaneden
- (Mayo County) Knockaturnin
- (Mayo County) Killeencoff
- (Mayo County) Knockfin
- (Mayo County) Knappagh Beg
- (Mayo County) Killaghhoor
- (Mayo County) Kilbree Lower
- (Mayo County) Kilbree Upper
- (Mayo County) Keeloges
- (Mayo County) Kilkenny
- (Mayo County) Knockaunbaun
- (Mayo County) Knockaskibbole
- (Mayo County) Knockrawer
- (Mayo County) Knockboy
- (Mayo County) Killadangan
- (Mayo County) Knockavanloman
- (Mayo County) Knockychottaun