Irlanda
Países do mundo
O
- (Kildare) Oldcourt
- (Kildare) Obelisks
- (Kildare) Oldgrange
- (Roscommon) Old Town
- (County Galway) Oghil
- (County Galway) Oxgrove Bridge
- (County Galway) Oldstreet
- (County Galway) Oultort
- (Clare) O’Brien’s Bridge
- (Clare) Oil Mill Bridge
- (Limerick City and County Council) Oldmill Bridge
- (Clare) Oldtown
- (Limerick City and County Council) Oolagh Bridge
- (Kerry) Oaghley
- (County Tipperary) Orkneys Cross Roads
- (Kilkenny) Ovenstown
- (Kilkenny) Owning
- (Clare) Ogonnelloe
- (Limerick City and County Council) Old Bridge
- (Wexford) Oldtown Cross Roads
- (County Carlow) Orchard Bridge
- (Wexford) Old Town
- (Laois) Oldleagh
- (Kilkenny) Oldtown
- (Wexford) Orristown Cross Roads
- (County Waterford) Old Pike Bridge
- (County Cork) Old Courth
- (County Cork) Oldcastletown
- (County Cork) Old Bride Bridge
- (Kerry) Owroe Bridge