Ó Méith Oaghley O'Brien's Bridge O'Briensbridge O'Callaghansmills O'Connell Bridge Odoca Oggal Oghil Oghil Oghill Cross Roads Ogonnelloe Oil Mill Bridge Oileán Ciarraí Oilgate Old Bride Bridge Old Bridge Old Chapel Cross Roads Old Courth Old Kilcullen Old Kildimo Old Mountain Old Pallas Old Pike Bridge Old Port House Old Ross Old Town Old Town Old Town Old Town Old Town Old Twopothouse Cross Roads Oldbridge Oldcastle Oldcastle Oldcastletown Oldchapel Oldcourt Oldcourt Oldcourt Oldleagh Oldleighlin Oldmill Bridge Oldstreet Oldtown Oldtown Oldtown Oldtown Oldtown Cross Roads Omeath