Onaght Oola Oolagh Bridge Oran Órán Mór Oranmore Orchard Bridge Oristown Orkneys Cross Roads Ormond View Orristown Cross Roads Oughter Oughterard Oughtiv Oughtmama Oulart Ouley Oultort Ourtnagapple Ouvry Cross Roads Ovens Ovenstown Ovoca Owenbeg Owenbristy Owenduff Owenea Bridge Ower Owgarrif Bridge Ownagarry Bridge Owning Owroe Bridge Oxgrove Bridge Oysterhaven