- Middletown
- Mill Town
- Mill Town
- Millford
- Millmount
- Milltown
- Milltown
- Milltown
- Milltown
- Milltown
- Milltown
- Milltown
- Milltown
- Milltown
- Mitchells Town
- Moher
- Monalia
- Monargan Glebe
- Monasteraden
- Moneensauran
- Moneyhaughly
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- Monglass
- Monneill
- Moress
- Mossedge
- Mountnugent
- Mountain Lodge
- Mountcharles