M
- (County Cork) Mariner's Row
- (Kerry) Maharees
- (Clare) Meelick
- (Clare) Maidens Island
- (County Tipperary) Mountrivers
- (County Tipperary) Munnia
- (County Tipperary) Mountsack
- (Kerry) Martara
- (Kerry) Mweevoo
- (Kerry) Moohane
- (Kerry) Muckemagh
- (Kerry) Mweevuck
- (Kerry) Meenogahane
- (Kerry) Maulin
- (Clare) Moyarta West
- (Clare) Moyarta East
- (Clare) Moveen West
- (Clare) Mutton Island
- (Clare) Murroogh
- (County Cork) Murragh
- (Clare) Mullagh
- (Kerry) Muingwee
- (Kerry) Muingvautia
- (County Cork) Muccurragh
- (County Cork) Moyny
- (County Tipperary) Moyne
- (Clare) Moyasta
- (County Cork) Mount Uniacke
- (County Cork) Mount Keeffe
- (County Waterford) Mount Druid