| Feature | X | Y | Map | AKA | Parish | County | Type | Feature Meaning |
| na blaney bone, Lough | 57 | 47 | 18 | Tyrone | ||||
| na heery, Lough | 56 | 44 | 18 | Tyrone | ||||
| Nablaby, Lough | 23 | 40 | 18 | Fermanagh | ||||
| Nacally, Lough | 5 | 17 | 6 | Donegal | ||||
| Nacarragh | 89 | 16 | 8 | Derry | ||||
| Nacrilly, Lough | 81 | 63 | 19 | Tyrone | ||||
| Nadaphreaghane | 42 | 27 | 7 | Donegal | ||||
| Nadourcon, Lough | 5 | 22 | 6 | Donegal | ||||
| Nadum, Lough | 5 | 75 | 12 | Donegal | ||||
| Nageage, Lough | 17 | 74 | 12 | Donegal | ||||
| Naghan | 40 | 41 | 21 | Loughinisland | Down | T | ||
| Nambraddan, Lough | 2 | 19 | 6 | Donegal | ||||
| Namna, Lough | 9 | 70 | 12 | Donegal | ||||
| Nanallog, Lough | 59 | 79 | 13 | Tyrone | ||||
| Nannys Cave | 23 | 25 | 5 | Antrim | ||||
| Nappan | 28 | 23 | 9 | Ardclinis | Antrim | T | ||
| Nare | x | Ballyaghran | Derry | T | ||||
| Naroon, Lough | 0 | 17 | 8 | Antrim | ||||
| Nashannagh, Lough | 11 | 72 | 12 | Tyrone | ||||
| Nasoogan, Lough | 5 | 70 | 12 | Donegal | ||||
| Natroey, Lough | 49 | 40 | 18 | Fermanagh | ||||
| Natroy, Lough | 50 | 46 | 18 | Tyrone | ||||
| Natullig, Lough | 24 | 21 | 9 | Antrim | ||||
| Nature Reserve | 4 | 61 | 20 | Armagh | ||||
| Nature Reserve | 50 | 70 | 15 | Down | ||||
| Naul | 80 | 43 | 19 | Armagh | ||||
| Navaddage, Lough | 48 | 41 | 18 | Fermanagh | ||||
| Navan | 85 | 44 | 19 | Armagh | ||||
| Navan Fort | 84 | 45 | 19 | Armagh | ||||
| Navarad, Lough | 55 | 44 | 18 | Tyrone | ||||
| Naveane, Lough | 17 | 73 | 12 | Donegal | ||||
| Navenny | 14 | 94 | x | Donaghmore | Donegal | T | ||
| Navenny Bridge | 13 | 94 | 12 | Donaghmore | Donegal | |||
| Navenny Bridge | 14 | 94 | 6 | Donaghmore | Donegal | |||
| Navenny Hill | 14 | 93 | 12 | Donaghmore | Donegal | |||
| Navenny Island | 14 | 94 | 12 | Donaghmore | Donegal | |||
| Navvies Drain | 9 | 66 | 20 | Antrim | ||||
| Naweeloge, Lough | 97 | 18 | 6 | Donegal | ||||
| Neagh, Lough | 2 | 75 | 14 | Antrim | ||||
| Neagh, Lough | 91 | 69 | 19 | Tyrone | ||||
| Neas, Lough | 37 | 4 | 7 | Tyrone | ||||
| Necarne Castle | 23 | 57 | 18 | Fermanagh | ||||
| Necarne Forest | 23 | 56 | 18 | Fermanagh | ||||
| Ned | 61 | 20 | 4 | Tamlaght Finlagan | Derry | T | ||
| Ned | 61 | 20 | 7 | Tamlaght Finlagan | Derry | T | ||
| Nedsherry | 26 | 63 | 18 | Fermanagh | ||||
| Needoo | 57 | 58 | 21 | Down | ||||
| Neely's Hill | 1 | 97 | 14 | Antrim | ||||
| Neill, Carn | 24 | 23 | 9 | Antrim | ||||
| Neills Burn | 21 | 85 | 14 | Antrim | ||||
| Neills Top | 23 | 13 | 9 | Antrim | ||||
| Nelly's Cave | 10 | 42 | 5 | Antrim | ||||
| Nelsons Fort | 22 | 76 | 14 | Antrim | ||||
| Nendrum Monastic Site | 52 | 63 | 21 | Down | ||||
| Ness Wood Country Park | 51 | 10 | 7 | Derry | ||||
| Ness Wood Country Park | 53 | 11 | 7 | Derry | ||||
| Nessagh | 61 | 16 | 7 | Derry | ||||
| Nessagh Bridge | 61 | 17 | 7 | Derry | ||||
| Nettle Bush | 20 | 88 | 14 | Antrim | ||||
| Nettlebush Bridge | 20 | 87 | 14 | Antrim | ||||
| New Bridge, The | 20 | 61 | 20 | Antrim | ||||
| New Bridge | 7 | 32 | 5 | Antrim | ||||
| New Bridge | 22 | 41 | 18 | Fermanagh | ||||
| New Bridge | 36 | 87 | 12 | Tyrone | ||||
| New Bridge | 39 | 99 | 12 | Tyrone | ||||
| New Bridge | 45 | 64 | 18 | Tyrone | ||||
| New Bridge | 49 | 84 | 13 | Tyrone | ||||
| New Bridge | 68 | 13 | 7 | Derry | ||||
| New Bridge | 83 | 76 | 13 | Tyrone | ||||
| New Bridge | 89 | 52 | 19 | Armagh | ||||
| New Bridge | 95 | 90 | 14 | Derry | ||||
| New Bridge, The | 40 | 73 | 12 | Tyrone | ||||
| New Buildings | 41 | 12 | 7 | Derry | ||||
| New Buildings | 82 | 78 | x | Derryloran | Tyrone | T | ||
| New Buildings | 91 | 18 | 8 | Maddydoo Lower | Finvoy | Antrim | T | |
| New Buildings North | 93 | 30 | 4 | Ballymoney | Antrim | T | ||
| New Buildings North | 93 | 30 | 5 | Ballymoney | Antrim | T | ||
| New Buildings South | 96 | 24 | 4 | Ballymoney | Antrim | T | ||
| New Buildings South | 96 | 24 | 8 | Ballymoney | Antrim | T | ||
| New Clare | 37 | 9 | 7 | Tyrone | ||||
| New Comber House | 46 | 68 | 15 | Down | ||||
| New Grove | 31 | 66 | 20 | Down | ||||
| New Line Crescent | 51 | 57 | 21 | Down | ||||
| New Lodge | 18 | 85 | 14 | Antrim | ||||
| New Lough | 49 | 84 | 13 | Tyrone | ||||
| New Park | 32 | 60 | 18 | Dromore | Tyrone | T | ||
| New Quay | 64 | 53 | 21 | Down | ||||
| New River | 46 | 49 | 18 | Tyrone | ||||
| New Town | 3 | 36 | 5 | Antrim | ||||
| New Town | 94 | 2 | 8 | Derry | ||||
| Newbuildings | 0 | 34 | 5 | Antrim | ||||
| Newbuildings | 99 | 43 | 4 | Antrim | ||||
| Newbuildings | 99 | 43 | 5 | Antrim | ||||
| Newbuildings Bridge | 97 | 25 | 4 | Antrim | ||||
| Newbuildings Bridge | 97 | 25 | 5 | Antrim | ||||
| Newbuildings Bridge | 97 | 25 | 8 | Antrim | ||||
| Newcastle | 63 | 53 | 21 | Slanes | Down | T | ||
| Newferry | 98 | 97 | 14 | Derry | ||||
| Newfield | 15 | 64 | 20 | Antrim | ||||
| Newfield | 54 | 78 | 15 | Down | ||||
| Newforte | 45 | 72 | 15 | Down | ||||
| Newforte | 45 | 72 | 21 | Down | ||||
| Newgrove | 43 | 54 | 21 | Down | ||||
| Newhill | x | Ballymoney | Antrim | T | ||||
| Newlands | 41 | 97 | 9 | Glynn | Antrim | T | ||
| Newmill | 23 | 19 | 6 | Aughnish | Donegal | T | ||
| Newmill | 23 | 89 | 14 | Antrim | ||||
| Newmill Bridge | 16 | 59 | 20 | Down | ||||
| Newmills | 6 | 51 | 20 | Down | T | |||
| Newmills | 12 | 8 | 6 | Donegal | ||||
| Newmills | 22 | 93 | 12 | Donegal | ||||
| Newmills | 81 | 67 | 19 | Tullyniskan | Tyrone | |||
| Newpark | 84 | 18 | 8 | Derry | ||||
| Newpark | 95 | 27 | 4 | Antrim | ||||
| Newpark | 95 | 27 | 5 | Antrim | ||||
| Newpark | 95 | 27 | 8 | Antrim | ||||
| Newpark | 17 | 86 | x | Antrim | Antrim | T | ||
| Newpark Ind Est | 17 | 86 | 14 | Antrim | Antrim | |||
| Newport | 23 | 61 | 20 | Down | ||||
| Newrow | 24 | 0 | 6 | Raphoe | Donegal | T | ||
| Newrow | 33 | 2 | 6 | Clonleigh | Donegal | T | ||
| Newrow | 33 | 2 | 7 | Clonleigh | Donegal | T | ||
| Newry | 48 | 50 | 18 | Clogher | Tyrone | T | ||
| Newtown | 23 | 11 | 9 | Antrim | ||||
| Newtown Cunningham | 31 | 16 | 6 | All Saints | Donegal | T | ||
| Newtown Cunningham | 31 | 16 | 7 | All Saints | Donegal | T | ||
| Newtown Limavady | 67 | 22 | x | Rathbrady Beg | Drumachose | Derry | T | |
| Newtown Rock | 56 | 63 | 21 | Down | ||||
| Newtown-Crommelin | 14 | 17 | 9 | Antrim | ||||
| Newtownabbey | 33 | 82 | 15 | Antrim | ||||
| Newtownards | 48 | 73 | 21 | Down | ||||
| Newtownards | 50 | 75 | 15 | Down | ||||
| Newtownboy | 34 | 27 | 7 | Donegal | ||||
| Newtownbreda | 35 | 69 | 15 | Down | ||||
| Newtownbreda | 35 | 69 | 20 | Down | ||||
| Newtownfore | 20 | 17 | 6 | Aughnish | Donegal | T | ||
| Newtowngrove | 17 | 21 | 6 | Grovehall | Kilmacrenan | Donegal | T | |
| Newtownhamilton | 38 | 11 | 7 | Killea | Donegal | T | ||
| Newtownsaville | 53 | 59 | 18 | Tyrone | ||||
| Newtownstewart | 40 | 85 | 12 | Ardstraw | Tyrone | T | ||
| Niblock | 15 | 89 | 14 | Antrim | Antrim | T | ||
| Nichan, Lough | 5 | 82 | 12 | Donegal | ||||
| Nicholsons Cross Roads | 26 | 51 | 20 | Down | ||||
| Nickey's Point | 52 | 51 | 21 | Down | ||||
| Nimmistown | 15 | 96 | 14 | Antrim | ||||
| Nimmistown | 15 | 96 | 9 | Antrim | ||||
| Nine Mile Bridge | 62 | 70 | 13 | Tyrone | ||||
| Ninewell Bridge | 82 | 54 | 19 | Clonfeacle | Tyrone | |||
| Nixon's Corner | 40 | 14 | 7 | Derry | ||||
| Noble's Bridge | 45 | 59 | 18 | Tyrone | ||||
| Nook, The | 85 | 83 | 14 | Derry | ||||
| North Boretree Rock | 54 | 68 | 21 | Down | ||||
| North Buckey Rock | 57 | 61 | 21 | Down | ||||
| North Carn | 36 | 92 | 15 | Antrim | ||||
| North East Division | 41 | 91 | x | Carrickfergus | Antrim | T | ||
| North Head | 46 | 2 | 9 | Antrim | ||||
| North Point | 53 | 52 | 21 | Down | ||||
| North Rock | 51 | 68 | 15 | Down | ||||
| North Rock | 51 | 68 | 21 | Down | ||||
| North Rocks | 67 | 56 | 21 | Down | ||||
| Northfield | 56 | 7 | 7 | Derry | ||||
| Northland Hill | 20 | 97 | 12 | Donegal | ||||
| Novally | 9 | 40 | 5 | Romoan | Antrim | T | ||
| Nugent's Wood | 58 | 51 | 21 | Down | ||||
| Nunnery Hill | 80 | 60 | 19 | Tyrone | ||||
| Nuns Bridge | 15 | 5 | 9 | Antrim | ||||
| Nuns Bridge | 62 | 55 | 21 | Down | ||||
| Nuns Hill | 54 | 50 | 18 | Tyrone | ||||
| Nuns Quarter | 59 | 63 | 21 | Inishargy | Down | T | ||
| Nurchossy | 50 | 49 | 18 | Tyrone | ||||
| Nurchossy Irish | 50 | 49 | x | Clogher | Tyrone | T | ||
| Nurchossy Lough | 50 | 50 | 18 | Clogher | Tyrone | |||
| Nurchossy Scotch | 51 | 49 | x | Clogher | Tyrone | T | ||
| Nursery | 91 | 38 | 5 | Antrim | ||||
| Nut Bank | 17 | 53 | 20 | Down | ||||
| Nut Grove | 42 | 43 | 21 | Down | ||||
| Nut Hill Bridge | 19 | 59 | 20 | Down | ||||
| Nut Hill, The | 18 | 58 | 20 | Down | ||||
| Nutgrove Wood | 82 | 93 | 13 | Derry | ||||
| Nutt's Corner | 19 | 78 | 14 | Antrim | ||||
| O'Cahan's Bridge | 73 | 26 | 8 | Derry | ||||
| O'Cahans Castle | 67 | 20 | 7 | Derry | ||||
| O'Cahans Rock | 67 | 20 | 7 | Derry | ||||
| O'Connor's Stronghold, The | 93 | 64 | 19 | Armagh | ||||
| O'Neil Park | 94 | 87 | 14 | Derry | ||||
| O'Neill's Corner | 5 | 6 | 8 | Antrim | ||||
| O'Neils Mount | 86 | 44 | 19 | Armagh | ||||
| Oaghmonicroy | 61 | 87 | x | Bodoney Lower | Tyrone | T | ||
| Oaghmonicroy Hill | 61 | 87 | 13 | Bodoney Lower | Tyrone | |||
| Oak Island | 85 | 95 | 14 | Derry | ||||
| Oak Lough | 49 | 84 | 13 | Tyrone | ||||
| Oak Rock | 24 | 65 | 18 | Fermanagh | ||||
| Oak Wood | 30 | 58 | 20 | Down | T | |||
| Oakdene | 28 | 84 | 12 | Tyrone | ||||
| Oakfield | 1 | 50 | 20 | Armagh | ||||
| Oakfield Demesne | 27 | 3 | 6 | Raphoe | Donegal | T | ||
| Oakfield House | 11 | 78 | 14 | Antrim | ||||
| Oakfort | 88 | 16 | 8 | Derry | ||||
| Oakhill | 30 | 65 | 15 | Down | ||||
| Oakhill | 30 | 65 | 20 | Down | ||||
| Oakhill Farm | 71 | 15 | 8 | Derry | ||||
| Oakland Villas | 77 | 77 | 13 | Tyrone | ||||
| Oaklands | 45 | 75 | 13 | Cappagh | Tyrone | |||
| Oaklands | 76 | 77 | x | Kildress | Tyrone | T | ||
| Oakmans Hill | 16 | 73 | 14 | Antrim | ||||
| Oaks Bridge | 49 | 10 | 7 | Derry | ||||
| Oaks, The | 8 | 95 | 14 | Antrim | ||||
| Oaks, The | 16 | 46 | 20 | Down | ||||
| Oaks, The | 49 | 11 | 7 | Derry | ||||
| Oatlands | 64 | 26 | 4 | Derry | ||||
| Oatlands | 65 | 26 | 7 | Derry | ||||
| Oatlands | 79 | 34 | 4 | Derry | ||||
| Oatlands | 85 | 19 | 8 | Derry | ||||
| Odyssey Arena | 34 | 74 | 15 | Down | ||||
| Oghill | 20 | 54 | 18 | Fermanagh | ||||
| Oghill | 22 | 66 | 18 | Fermanagh | ||||
| Oghill | 51 | 14 | 7 | Cumber Lower | Derry | T | ||
| Oghill | 61 | 5 | 7 | Derry | ||||
| Oghill | 89 | 71 | x | Ballyclog | Tyrone | T | ||
| Oghill | x | Tamlaght Finlagan | Derry | T | ||||
| Oghill | Aghalurcher | Fermanagh | T | |||||
| Oghill Wood | 89 | 71 | 14 | Tyrone | ||||
| Oghtbristacree | 16 | 32 | 5 | Antrim | ||||
| Ogilby Island | 50 | 68 | 15 | Down | ||||
| Ogilby Island | 50 | 68 | 21 | Down | ||||
| Ogle's Fort | 10 | 56 | 20 | Down | ||||
| Oglis | 12 | 69 | 20 | Antrim | ||||
| Ogrey | 3 | 9 | 8 | Antrim | ||||
| Oil Depot | 36 | 76 | 15 | Down | ||||
| Old Castle Wood | 36 | 83 | 12 | Tyrone | ||||
| Old Church Bridge | 73 | 90 | 13 | Derry | ||||
| Old Church Yard | 61 | 73 | x | Termonmaguirk | Tyrone | T | ||
| Old Forge | 30 | 68 | x | Shankill | Antrim | T | ||
| Old Glen | 46 | 7 | 7 | Tyrone | ||||
| Old Hill | 72 | 80 | 13 | Tyrone | ||||
| Old Man's Hat | 20 | 52 | 18 | Fermanagh | ||||
| Old Mans Head | 57 | 56 | 21 | Down | ||||
| Old Mill | 37 | 7 | 9 | Antrim | ||||
| Old Mill Bridge | 44 | 80 | 12 | Cappagh | Tyrone | |||
| Old Park | 25 | 67 | 15 | Antrim | ||||
| Old Park | 25 | 67 | 20 | Antrim | ||||
| Old Park | 32 | 77 | 15 | Shankill | Antrim | T | ||
| Old Pier | 25 | 25 | 5 | Antrim | ||||
| Old Town | 3 | 36 | 5 | Antrim | ||||
| Old Town | 46 | 86 | 13 | Tyrone | ||||
| Old Town | 87 | 89 | 14 | Derry | ||||
| Old Town | 90 | 9 | 8 | Derry | ||||
| Old Town | 92 | 35 | 4 | Antrim | ||||
| Old Town | 92 | 35 | 5 | Antrim | ||||
| Old Town Deer Park | x | Ballyscullion | Derry | T | ||||
| Old Town, The | 45 | 27 | 7 | Donegal | ||||
| Oldchurch Bay | 46 | 95 | 9 | Antrim | ||||
| Olderfleet Castle | 41 | 1 | 9 | Antrim | ||||
| Oldfreehold | 32 | 2 | 9 | Kilwaughter | Antrim | T | ||
| Oldmill Bay | 45 | 96 | 9 | Antrim | ||||
| Oldmill Bridge | 37 | 84 | 12 | Tyrone | ||||
| Oldstone | 16 | 84 | 14 | Grange of Muckamore | Antrim | T | ||
| Oldtown | 14 | 96 | 14 | Antrim | ||||
| Oldtown | 16 | 10 | 6 | Leck | Donegal | T | ||
| Oldtown | 23 | 93 | 14 | Antrim | ||||
| Oldtown Bridge | 2 | 36 | 5 | Antrim | ||||
| Oldtown Bridge | 92 | 9 | 8 | Derry | ||||
| Oldtown Hill | 13 | 14 | 9 | Antrim | ||||
| Oldtown House | 94 | 96 | 14 | Derry | ||||
| Oldwood Terrace | 12 | 92 | 14 | Antrim | ||||
| Olil | x | Dungiven | Derry | T | ||||
| Omagh | 45 | 72 | 12 | Omeigh | Drumragh | Tyrone | Virgin plane | |
| Omagh | 45 | 72 | 13 | Drumragh | Tyrone | |||
| Ominey River | 10 | 71 | 12 | Donegal | ||||
| Oona Bridge | 78 | 53 | 19 | Clonfeacle | Tyrone | |||
| Oona Water | 72 | 58 | 19 | Tyrone | ||||
| Orangefield | 36 | 73 | 15 | Down | ||||
| Orchard Hill | 31 | 94 | 12 | Tyrone | ||||
| Orchard Hill | 32 | 95 | 6 | Tyrone | ||||
| Orchard View | 89 | 82 | 14 | Derry | ||||
| Orchardtown | 52 | 21 | 7 | Derry | ||||
| Organ, The | 95 | 44 | 4 | Antrim | ||||
| Organ, The | 95 | 44 | 5 | Antrim | ||||
| Oritor | 77 | 79 | 13 | Kildress | Tyrone | T | ||
| Orlock | 55 | 83 | x | Bangor | Down | T | ||
| Orlock Point | 55 | 83 | 15 | Down | ||||
| Ormeau Park | 34 | 72 | 15 | Down | ||||
| Oroorytown | 16 | 51 | 20 | Down | ||||
| Orpinsmill | 26 | 93 | 15 | Antrim | ||||
| Orra Beg | 14 | 27 | 5 | Antrim | ||||
| Orra More | 13 | 26 | 5 | Slieveanorra | Antrim | |||
| Orrfield | 22 | 59 | 20 | Down | ||||
| Osier Hill | 38 | 43 | 18 | Fermanagh | ||||
| Ossian's Grave | 20 | 28 | 5 | Antrim | ||||
| Otter Isles, The | 85 | 42 | 4 | Antrim | ||||
| Oughrtdoorish | 57 | 94 | 13 | Tyrone | ||||
| Oughtagh | 53 | 11 | 7 | Cumber Lower | Derry | T | ||
| Oughtaraddy Burn | 57 | 98 | 13 | Derry | ||||
| Oughtboy | 58 | 95 | 13 | Bodoney Upper | Tyrone | T | ||
| Oughtboy Bridge | 59 | 92 | 13 | Tyrone | ||||
| Oughtboy Burn | 59 | 94 | 13 | Tyrone | ||||
| Oughtdoorish | 57 | 92 | 13 | Bodoney Upper | Tyrone | T | ||
| Oughtdoorish Burn | 57 | 94 | 13 | Tyrone | ||||
| Oughterard | 32 | 64 | 18 | Dromore | Tyrone | T | ||
| Oughterard | 75 | 71 | x | Desertcreat | Tyrone | T | ||
| Oughterard Hill | 75 | 71 | 13 | Tyrone | ||||
| Oughterard Lower, Bridge | 75 | 71 | 13 | Tyrone | ||||
| Oughthustachree | 22 | 72 | 12 | Tyrone | ||||
| Oughtmame | 62 | 95 | 13 | Bodoney Upper | Tyrone | T | ||
| Oughtmame Burn | 62 | 94 | 13 | Tyrone | ||||
| Oughtmore | 69 | 97 | 13 | Tyrone | ||||
| Oughtmore | 72 | 83 | 13 | Tyrone | ||||
| Oughtnager | 50 | 94 | 13 | Tyrone | ||||
| Oughtnamwella | 63 | 95 | 13 | Bodoney Upper | Tyrone | T | ||
| Oughtnashancullion Glen | 56 | 97 | 13 | Tyrone | ||||
| Oughtvabeg | 66 | 96 | 13 | Tyrone | ||||
| Oughtymore | 65 | 31 | x | Magilligan (Tamlaghtard) | Derry | T | ||
| Oughtymoyle | 65 | 31 | 4 | Magilligan (Tamlaghtard) | Derry | T | ||
| Ouig | 15 | 50 | 5 | Antrim | ||||
| Ouley Hill | 38 | 62 | 20 | Antrim | ||||
| Ouna | 16 | 24 | 9 | Eagle Hill | Antrim | |||
| Ouske, Lough | 70 | 93 | 13 | Derry | ||||
| Outal | 5 | 13 | 8 | Grange of Dundermot | Antrim | T | ||
| Outhill | 90 | 36 | 4 | Antrim | ||||
| Outhill | 90 | 36 | 5 | Antrim | ||||
| Outhill | x | Ballyrashane | Antrim | T | ||||
| Outlands of Galvally | 84 | 71 | x | Donaghenry | Tyrone | T | ||
| Oval, The | 36 | 74 | 15 | Down | ||||
| Ovil | 64 | 8 | 7 | Derry | ||||
| Ovil Hill | 62 | 8 | 7 | Derry | ||||
| Oville House | 65 | 9 | 7 | Derry | ||||
| Owen Roe Flat | 4 | 62 | 20 | Armagh | ||||
| Owen's Bridge | 37 | 0 | 9 | Antrim | ||||
| Owenalena River | 74 | 5 | 8 | Derry | ||||
| Owenbane | 55 | 70 | 13 | Tyrone | ||||
| Owenbeg | 67 | 9 | 7 | Dungiven | Derry | T | ||
| Owenbeg River | 1 | 12 | 6 | Donegal | ||||
| Owenbeg River | 65 | 1 | 7 | Derry | ||||
| Owenbeg River | 65 | 2 | 7 | Derry | ||||
| Owenbeg River | 67 | 9 | 7 | Derry | ||||
| Owenbeg River | 99 | 23 | 6 | Donegal | ||||
| Owenboy | 12 | 77 | 12 | Tyrone | ||||
| Owenbrack River | 62 | 65 | 19 | Tyrone | ||||
| Owencam River | 15 | 34 | 5 | Antrim | ||||
| Owencloghy | 26 | 4 | 9 | Tickmacrevan | Antrim | T | ||
| Owencloghy House | 26 | 6 | 9 | Antrim | ||||
| Owencloghy Water | 26 | 5 | 9 | Antrim | ||||
| Owenkillew and Barnahome | 40 | 29 | 7 | Fahan Lower | Donegal | T | ||
| Owenkillew River | 39 | 29 | 7 | Donegal | ||||
| Owenkillew River | 42 | 86 | 12 | Tyrone | ||||
| Owenkillew River | 43 | 29 | 7 | Donegal | ||||
| Owenkillew River | 55 | 86 | 13 | Tyrone | ||||
| Owenmore Bridge | 40 | 98 | 12 | Tyrone | ||||
| Owennacally | 4 | 21 | 6 | Donegal | ||||
| Owennagadragh | 22 | 91 | x | Donaghmore | Donegal | T | ||
| Owennaglush Bridge | 17 | 28 | 5 | Antrim | ||||
| Owennaglush River | 15 | 28 | 5 | Antrim | ||||
| Owenreagh | 41 | 96 | 12 | Leckpatrick | Tyrone | T | ||
| Owenreagh | 74 | 91 | 13 | Ballynascreen | Derry | T | ||
| Owenreagh Bridge | 74 | 92 | 13 | Ballynascreen | Derry | |||
| Owenreagh Burn | 40 | 97 | 12 | Tyrone | ||||
| Owenreagh Hill | 41 | 95 | 12 | Tyrone | ||||
| Owenreagh River | 33 | 65 | 18 | Tyrone | ||||
| Owenreagh River | 42 | 67 | 18 | Tyrone | ||||
| Owenreogh River | 56 | 83 | 13 | Tyrone | ||||
| Owenrigh Bridge | 66 | 6 | 7 | Derry | ||||
| Owenrigh River | 67 | 7 | 7 | Derry | ||||
| Owenskerry | 42 | 43 | 18 | Aghalurcher | Fermanagh | T | ||
| Owensland | 24 | 92 | 14 | Kilbride | Antrim | T | ||
| Owenvehy | 98 | 13 | 6 | Donegal | ||||
| Owenwee River | 0 | 12 | 6 | Donegal | ||||
| Oweydoo | 14 | 48 | 5 | Antrim | ||||
| Oxford Island | 4 | 61 | 20 | Armagh | ||||
| Oxtown | 54 | 76 | 13 | Termonmaguirk | Tyrone | T | ||
| Oystervale | 62 | 28 | 4 | Derry | ||||
| Oystervale | 63 | 28 | 7 | Derry | ||||
| Packulla | 54 | 44 | 18 | Tyrone | ||||
| Pad Lough | 32 | 42 | 18 | Fermanagh | ||||
| Paddy's Knowe | 24 | 88 | 14 | Antrim | ||||
| Paddy's Point | 51 | 66 | 15 | Down | ||||
| Paddy's Point | 51 | 66 | 21 | Down | ||||
| Padian | 6 | 63 | 20 | Armagh | ||||
| Palace, The | 88 | 44 | 19 | Armagh | ||||
| Palantine | 26 | 87 | 15 | Antrim | ||||
| Pale Moss | 10 | 66 | 20 | Antrim | ||||
| Palm Lodge | 82 | 64 | 19 | Killyman | Tyrone | |||
| Palmers Hill | 64 | 60 | 21 | Down | ||||
| Palmerstown | 17 | 77 | 14 | Antrim | ||||
| Palms, The | 91 | 77 | 14 | Tyrone | ||||
| Pans Rock | 13 | 41 | 5 | Culfeightrin | Antrim | T | ||
| Panther, Mount | 9 | 45 | 20 | Down | ||||
| Parblin | 24 | 19 | x | Aughnish | Donegal | T | ||
| Paridise Walk Bridge | 21 | 87 | 14 | Antrim | ||||
| Paris Island Big | 20 | 52 | 18 | Fermanagh | ||||
| Paris Island Little | 20 | 51 | 18 | Fermanagh | ||||
| Parish Burn | 6 | 98 | 14 | Antrim | ||||
| Park | 58 | 2 | 7 | Derry | ||||
| Park | x | Armoy | Antrim | T | ||||
| Park & New | x | Antrim | Antrim | T | ||||
| Park Bog | 5 | 47 | 20 | Down | ||||
| Park Bridge | 58 | 2 | 7 | Derry | ||||
| Park Burn | 10 | 26 | 5 | Antrim | ||||
| Park Cove | 14 | 47 | 5 | Antrim | ||||
| Park Hall | x | Antrim | Antrim | T | ||||
| Park Head | 32 | 15 | 9 | Antrim | ||||
| Park Hill | 90 | 4 | 8 | Derry | ||||
| Park House | 29 | 10 | 9 | Antrim | ||||
| Park House | 31 | 49 | 20 | Down | ||||
| Park Lake | 24 | 58 | 20 | Down | ||||
| Park Lake, The | 8 | 58 | 20 | Armagh | ||||
| Park View | 9 | 89 | 14 | Antrim | ||||
| Park View | 14 | 81 | 14 | Antrim | ||||
| Park View | 25 | 58 | 20 | Down | ||||
| Park, East | 90 | 37 | 4 | Dunluce | Antrim | T | ||
| Park, East | 90 | 37 | 5 | Dunluce | Antrim | T | ||
| Park, The | 10 | 25 | 5 | Antrim | ||||
| Park, The | 20 | 49 | 20 | Down | ||||
| Park, The | 27 | 80 | 12 | Tyrone | ||||
| Park, The | 38 | 47 | 20 | Down | ||||
| Park, The | 43 | 46 | 21 | Down | ||||
| Park, West | 90 | 38 | 4 | Dunluce | Antrim | T | ||
| Park, West | 91 | 38 | 5 | Dunluce | Antrim | T | ||
| Parkanur | 73 | 61 | 19 | Tyrone | ||||
| Parkanur Forest Park | 73 | 61 | 19 | Tyrone | ||||
| Parkaveadan Burn | 72 | 0 | 8 | Derry | ||||
| Parkboy | 30 | 7 | 9 | Antrim | ||||
| Parker's Farm | 85 | 70 | x | Donaghenry | Tyrone | T | ||
| Parkgate | 22 | 87 | 14 | Antrim | ||||
| Parkgrom | 54 | 92 | 13 | Tyrone | ||||
| Parkhill | 23 | 62 | 18 | Fermanagh | ||||
| Parkhill Lough | 22 | 62 | 18 | Fermanagh | ||||
| Parklands | 38 | 87 | 15 | Antrim | ||||
| Parkmore | 19 | 21 | 9 | Aganlane | Layd | Antrim | T | |
| Parkmore | 62 | 69 | 19 | Tyrone | ||||
| Parkmount | 26 | 90 | 15 | Antrim | ||||
| Parks, The | 93 | 7 | 8 | Derry | ||||
| Parkstone | 27 | 87 | 15 | Antrim | ||||
| Parkstown | 8 | 49 | 20 | Down | ||||
| Parliament Buildings | 40 | 75 | 15 | Down | ||||
| Parochial House | 3 | 39 | 5 | Antrim | ||||
| Parson Hall | 60 | 50 | 21 | Ballytrustan | Down | T | ||
| Parton Island | 54 | 60 | 21 | Down | ||||
| Pass, The | 78 | 30 | 4 | Derry | ||||
| Path Head | 32 | 13 | 9 | Antrim | ||||
| Pathfoot | 33 | 12 | 9 | Antrim | ||||
| Patrick Lough | 74 | 90 | 13 | Derry | ||||
| Patrick's Hill | 55 | 69 | 18 | Tyrone | ||||
| Pattens Fall | 24 | 30 | 5 | Antrim | ||||
| Pattens Glen | 35 | 96 | 6 | Tyrone | ||||
| Pattens Glen | 35 | 96 | 12 | Tyrone | ||||
| Patterson's Hill | 56 | 68 | 15 | Down | ||||
| Patterson's Hill | 56 | 68 | 21 | Down | ||||
| Pattersons Hill | 18 | 6 | 9 | Antrim | ||||
| Pattersonstown | 16 | 66 | 20 | Antrim | ||||
| Pawle Island | 54 | 57 | 21 | Down | ||||
| Pawle Reef | 55 | 58 | 21 | Down | ||||
| Peacefield | 3 | 58 | 20 | Armagh | ||||
| Peacockbank | 31 | 92 | 12 | Urney | Tyrone | T | ||
| Peacocks Bridge | 5 | 32 | 5 | Antrim | ||||
| Peaisland Point | 52 | 61 | 21 | Down | ||||
| Pearl Hill | 98 | 55 | 19 | Armagh | ||||
| Peartree Hill | 15 | 65 | 20 | Antrim | ||||
| Peartree Hill | 21 | 63 | 20 | Antrim | ||||
| Peat Hill | 22 | 93 | 14 | Antrim | ||||
| Peatlands Park | 90 | 61 | 19 | Armagh | ||||
| Peeltown | 61 | 57 | 21 | Down | ||||
| Peep o'day | 60 | 51 | 21 | Down | ||||
| Peestown | 15 | 69 | 20 | Antrim | ||||
| Peggys Island | 55 | 68 | 15 | Down | ||||
| Peggys Island | 55 | 68 | 21 | Down | ||||
| Pellipar House | 68 | 10 | 7 | Derry | ||||
| Penny Hill | 70 | 33 | 4 | Derry | ||||
| Pennybridge Industral Estate | 11 | 1 | 9 | Antrim | ||||
| Pennyburn | 43 | 18 | 7 | Templemore | Derry | T | ||
| Pennyburn Bridge | 41 | 5 | 7 | Templemore | Tyrone | |||
| People's Park | 0 | 54 | 20 | Armagh | ||||
| Perrymount | 11 | 56 | 20 | Down | ||||
| Peters Bridge | 11 | 92 | 14 | Antrim | ||||
| Pettigoe Forest | 7 | 71 | 12 | Templecarn | Donegal | |||
| Pettigoe Forest | 10 | 70 | 12 | Templecarn | Donegal | |||
| Pharis | 2 | 14 | 8 | Antrim | ||||
| Pharis | 5 | 25 | 5 | Loughguile | Antrim | T | ||
| Pharis | 5 | 25 | 8 | Loughguile | Antrim | T | ||
| Pharis Hill | 5 | 25 | 5 | Loughguile | Antrim | |||
| Pharis Hill | 5 | 25 | 8 | Loughguile | Antrim | |||
| Phennick Point | 56 | 37 | 21 | Down | ||||
| Phersons Island | 59 | 56 | 21 | Down | ||||
| Phil's Fort | 18 | 53 | 20 | Down | ||||
| Philipboy Island | 9 | 73 | 12 | Donegal | ||||
| Phoenix | 16 | 98 | 14 | Antrim | ||||
| Pig Island | 54 | 70 | 15 | Down | ||||
| Pig Island | 54 | 70 | 21 | Down | ||||
| Pigeon Hill | 13 | 73 | 14 | Antrim | ||||
| Pigeon Top | 37 | 70 | 12 | Tyrone | ||||
| Pigeontown | 14 | 72 | 14 | Antrim | ||||
| Pigtail Bridge | 26 | 98 | 9 | Antrim | ||||
| Pike Hill | 3 | 17 | 8 | Antrim | ||||
| Pike Hole, The | 88 | 77 | 14 | Derry | ||||
| Pikestone | 49 | 48 | 21 | Down | ||||
| Pile Lights | 36 | 76 | 15 | Down | ||||
| Pillar | 59 | 47 | 21 | Down | ||||
| Pillar | 61 | 44 | 21 | Down | ||||
| Pillar | 61 | 45 | 21 | Down | ||||
| Pillar | 98 | 55 | 19 | Armagh | ||||
| Pillar Hill | 1 | 41 | 20 | Armagh | ||||
| Pillarhill | 35 | 51 | 20 | Down | ||||
| Pillars, The | 8 | 17 | 8 | Antrim | ||||
| Pillion, The | 66 | 59 | 21 | Down | ||||
| Pine Avenue | 91 | 77 | 14 | Tyrone | ||||
| Pines, The | 34 | 68 | 15 | Down | ||||
| Pines, The | 34 | 68 | 20 | Down | ||||
| Pines, The | 70 | 73 | 13 | Tyrone | ||||
| Piper Hill | 63 | 40 | 4 | Donegal | ||||
| Piper's Hill | 81 | 28 | 8 | Derry | ||||
| Pipers Cross Roads | 40 | 67 | 15 | Down | ||||
| Pipers Cross Roads | 40 | 67 | 21 | Down | ||||
| Pipers Hill | 81 | 28 | 4 | Derry | ||||
| Pladdies | 46 | 34 | 21 | Down | ||||
| Pladdy Lug | 61 | 45 | 21 | Down | ||||
| Plains, The | 93 | 18 | 8 | Antrim | ||||
| Plaiskin Farm | 96 | 45 | 4 | Antrim | ||||
| Plaiskin Farm | 96 | 45 | 5 | Antrim | ||||
| Plaiskin Head | 96 | 45 | 4 | Antrim | ||||
| Plaiskin Head | 96 | 45 | 5 | Antrim | ||||
| Plaister | 68 | 54 | 19 | Carnteel | Tyrone | T | ||
| Planetarium | 88 | 45 | 19 | Armagh | ||||
| Plantation House | 11 | 77 | 14 | Antrim | ||||
| Planting Hill | 45 | 91 | 15 | Antrim | ||||
| Plaskets Burn | 13 | 88 | 14 | Antrim | ||||
| Plaster | 31 | 15 | 6 | All Saints | Donegal | T | ||
| Plaster | 31 | 15 | 7 | All Saints | Donegal | T | ||
| Playing Field | 27 | 91 | 15 | Antrim | ||||
| Playing Fields | 40 | 88 | 15 | Antrim | ||||
| Plea Isle | 23 | 12 | 6 | Raymoghy | Donegal | T | ||
| Pleasant, Mount | 0 | 3 | 8 | Antrim | ||||
| Pleasant, Mount | 2 | 48 | 20 | Armagh | ||||
| Pleasant, Mount | 4 | 6 | 8 | Antrim | ||||
| Pleasant, Mount | 8 | 92 | 14 | Antrim | ||||
| Pleasant, Mount | 14 | 72 | 14 | Antrim | ||||
| Pleasant, Mount | 20 | 43 | 20 | Down | ||||
| Pleasant, Mount | 35 | 58 | 20 | Down | ||||
| Pleasant, Mount | 39 | 4 | 7 | Tyrone | ||||
| Pleasant, Mount | 43 | 74 | Old | Tyrone | ||||
| Pleasant, Mount | 92 | 46 | 19 | Armagh | ||||
| Pleasant, Mount | 97 | 44 | 19 | Armagh | ||||
| Pleasant, Port | 57 | 53 | Old | Tyrone | ||||
| Pleasure Hill | 20 | 74 | 14 | Antrim | ||||
| Pluck | 23 | 10 | 6 | Leck | Donegal | T | ||
| Pluck Bridge | 77 | 56 | 19 | Tyrone | ||||
| Plum Bank | 95 | 5 | 8 | Derry | ||||
| Plumbridge | 47 | 91 | 13 | Bodoney Upper | Tyrone | T | ||
| Poe Bridge | 43 | 75 | 12 | Cappagh | Tyrone | |||
| Poe River | 42 | 74 | Old | Tyrone | ||||
| Poguestown | 40 | 1 | 9 | Antrim | ||||
| Point Hill | 14 | 71 | 12 | Donegal | ||||
| Point Narrow | 43 | 2 | 9 | Antrim | ||||
| Point, The | 14 | 71 | 12 | Donegal | ||||
| Point, The | 75 | 87 | 13 | Derry | ||||
| Poland's Bridge | 19 | 42 | 20 | Down | ||||
| Polbautia | 6 | 4 | 6 | Donegal | ||||
| Pole Hill | 28 | 84 | 12 | Tyrone | ||||
| Pole Hill | 53 | 73 | 15 | Down | ||||
| Pole Hill | 53 | 73 | 21 | Down | ||||
| Poleglass | 27 | 70 | 15 | Derryaghy | Antrim | T | ||
| Polepatrick | x | Magherafelt | Derry | T | ||||
| Polfore | 37 | 62 | 18 | Dromore | Tyrone | T | ||
| Polintamny | 96 | 22 | 4 | Ballymoney | Antrim | T | ||
| Polintamny | 96 | 22 | 8 | Ballymoney | Antrim | T | ||
| Pollan Bay | 98 | 86 | 14 | Antrim | ||||
| Pollan Burn | 14 | 24 | 9 | Antrim | ||||
| Pollan Burn | 17 | 76 | 12 | Tyrone | ||||
| Pollan Burn | 25 | 18 | 9 | Antrim | ||||
| Pollan Burn | 49 | 81 | 13 | Tyrone | ||||
| Pollan Water | 80 | 4 | 8 | Derry | ||||
| Pollandoo | 96 | 8 | 6 | Gartan | Donegal | T | ||
| Pollandoo Burn | 59 | 98 | 13 | Derry | ||||
| Pollangorm Hill | 79 | 8 | 8 | Derry | ||||
| Pollanore | 56 | 97 | 13 | Tyrone | ||||
| Pollanroe Bridge | 58 | 83 | 13 | Tyrone | ||||
| Pollans | 7 | 10 | x | Conwal | Donegal | T | ||
| Pollawaddy | 6 | 84 | 12 | Donegal | ||||
| Pollboy Bridge | 44 | 43 | 18 | Fermanagh | ||||
| Polldoo | 5 | 82 | 12 | Donegal | ||||
| Pollee | 15 | 9 | 9 | Skerry | Antrim | T | ||
| Pollgarriv | 98 | 16 | 6 | Donegal | ||||
| Pollindoos | 39 | 93 | 15 | Antrim | ||||
| Pollnabrack | 74 | 4 | 8 | Derry | ||||
| Pollnabrock | 82 | 10 | 8 | Derry | ||||
| Pollnagaddy | 39 | 47 | 18 | Fermanagh | ||||
| Pollnalaght | 36 | 70 | 12 | Tyrone | ||||
| Pollnameeltoge | 59 | 92 | 13 | Tyrone | ||||
| Pollneillroe | 6 | 86 | 12 | Donegal | ||||
| Pollockstown | 37 | 2 | 7 | Leckpatrick | Tyrone | T | ||
| Pollramer Lake | 40 | 49 | 21 | Down | ||||
| Pollrinck | 93 | 43 | 4 | Antrim | ||||
| Pollrinck | 93 | 43 | 5 | Antrim | ||||
| Pomeroy | 70 | 72 | x | Pomeroy | Tyrone | T | ||
| Pomeroy | 79 | 15 | 8 | Derry | ||||
| Pomeroy (Village) | 68 | 72 | 13 | Pomeroy | Tyrone | |||
| Pomeroy Forest | 70 | 72 | 13 | Tyrone | ||||
| Pond | 89 | 22 | 4 | Derry | ||||
| Pond | 89 | 22 | 8 | Derry | ||||
| Pond Park House | 25 | 66 | 15 | Antrim | ||||
| Pond Park House | 25 | 66 | 20 | Antrim | ||||
| Poobles | 14 | 62 | 20 | Antrim | T | |||
| Poplar Valley | 16 | 76 | 14 | Antrim | ||||
| Poplars, The | 75 | 80 | 13 | Tyrone | ||||
| Porg Hill | 43 | 91 | 15 | Antrim | ||||
| Port Bridge | 3 | 12 | 8 | Antrim | ||||
| Port Bridge | 18 | 11 | 6 | Donegal | ||||
| Port Calliagh | 10 | 42 | 5 | Antrim | ||||
| Port Dandy | 58 | 83 | 15 | Down | ||||
| Port Granny | 94 | 44 | 4 | Antrim | ||||
| Port Granny | 94 | 44 | 5 | Antrim | ||||
| Port Hill | 54 | 58 | 21 | Down | ||||
| Port Lagan | 58 | 83 | 15 | Down | ||||
| Port Lough | 34 | 16 | 6 | Donegal | ||||
| Port Lough | 34 | 16 | 7 | Donegal | ||||
| Port Moon | 97 | 45 | 4 | Antrim | ||||
| Port More | 7 | 43 | 5 | Antrim | ||||
| Port na Spaniagh | 95 | 45 | 4 | Antrim | ||||
| Port na Spaniagh | 95 | 45 | 5 | Antrim | ||||
| Port na Tober | 95 | 45 | 5 | Antrim | ||||
| Port na Tober | 96 | 45 | 4 | Antrim | ||||
| Port Nola | 67 | 41 | 4 | Donegal | ||||
| Port Obe | 24 | 28 | 5 | Antrim | ||||
| Port Vinegar | 24 | 28 | 5 | Antrim | ||||
| Port-aleen Bay | 23 | 40 | 5 | Antrim | ||||
| Portacoo | 58 | 40 | 21 | Down | ||||
| Portadoon | 21 | 41 | 5 | Antrim | ||||
| Portadown | 0 | 52 | 20 | Armagh | ||||
| Portaferry | 59 | 50 | 21 | Down | ||||
| Portaferry House | 59 | 51 | 21 | Down | ||||
| Portandoo Harbour | 85 | 41 | 4 | Antrim | ||||
| Portandoon | 9 | 51 | 5 | Antrim | ||||
| Portanearlagh | 57 | 51 | 21 | Down | ||||
| Portaneevey | 6 | 44 | 5 | Antrim | ||||
| Portantonnish | 14 | 48 | 5 | Antrim | ||||
| Portavaud | 66 | 59 | 21 | Down | ||||
| Portavo House | 56 | 82 | 15 | Down | ||||
| Portavoe | 56 | 81 | x | Bangor | Down | T | ||
| Portavogie | 65 | 59 | 21 | r St. Andrews | Down | T | ||
| Portballintrae | 92 | 41 | 4 | Antrim | ||||
| Portballintrae | 92 | 41 | 5 | Antrim | ||||
| Portbraddan | 0 | 44 | 5 | Antrim | ||||
| Portcarn | 10 | 42 | 5 | Antrim | ||||
| Portcastle | 16 | 51 | 5 | Antrim | ||||
| Portcreevy | 7 | 71 | 12 | Templecarn | Donegal | T | ||
| Portdavy | 48 | 92 | 15 | Antrim | ||||
| Portdoo | 19 | 42 | 5 | Antrim | ||||
| Porters Bridge | 18 | 68 | 20 | Antrim | ||||
| Portglenone | 97 | 3 | 8 | Antrim | ||||
| Portgleone Forest | 97 | 2 | 8 | Derry | ||||
| Porthall | 34 | 3 | 6 | Clonleigh | Donegal | T | ||
| Porthall | 34 | 3 | 7 | Clonleigh | Donegal | T | ||
| Portinaghy | 69 | 43 | 19 | Monaghan | ||||
| Portinure | 31 | 97 | 6 | Clonleigh | Donegal | T | ||
| Portkilarue | 68 | 42 | 4 | Donegal | ||||
| Portkill | 68 | 44 | 4 | Donegal | ||||
| Portlee | 2 | 85 | 14 | Drummaul | Antrim | T | ||
| Portlee Point | 3 | 84 | 14 | Drummaul | Antrim | |||
| Portleen | 17 | 23 | 6 | Kilmacrenan | Donegal | T | ||
| Portlehan | 57 | 38 | 21 | Down | ||||
| Portlough | 34 | 16 | 6 | All Saints | Donegal | T | ||
| Portlough | 34 | 17 | 7 | All Saints | Donegal | T | ||
| Portloughan | 54 | 50 | 21 | Saul | Down | T | ||
| Portloughan House | 55 | 49 | 21 | Down | ||||
| Portmoon House | 97 | 45 | 4 | Antrim | ||||
| Portmore | 12 | 68 | 20 | Antrim | ||||
| Portmore | 25 | 37 | 5 | Antrim | ||||
| Portmore | 81 | 38 | 4 | Derry | ||||
| Portmore House | 13 | 68 | 20 | Antrim | ||||
| Portmore Lough | 11 | 69 | 20 | Lough Beg | Antrim | |||
| Portmore Lough Nature Reserve | 10 | 68 | 20 | Antrim | ||||
| Portmuck | 45 | 2 | 9 | Antrim | ||||
| Portmuck Bay | 45 | 2 | 9 | Antrim | ||||
| Portmuck Castle | 46 | 2 | 9 | Antrim | ||||
| Portna | 93 | 12 | 8 | Derry | ||||
| Portna | 95 | 11 | 8 | Antrim | ||||
| Portnaboe | 8 | 51 | 5 | Antrim | ||||
| Portnaboe | 94 | 44 | 4 | Antrim | ||||
| Portnaboe | 94 | 44 | 5 | Antrim | ||||
| Portnabrock | 97 | 45 | 4 | Antrim | ||||
| Portnagovna | 98 | 44 | 4 | Antrim | ||||
| Portnagovna | 98 | 44 | 5 | Antrim | ||||
| Portnahapple | 81 | 37 | 4 | Derry | ||||
| Portnakillew | 8 | 43 | 5 | Antrim | ||||
| Portnaminnan | 15 | 50 | 5 | Antrim | ||||
| Portnathalin | 24 | 38 | 5 | Antrim | ||||
| Portneal | 93 | 13 | 8 | Atrim | ||||
| Portneillinwore Hill | 6 | 73 | 12 | Donegal | ||||
| Portnocker | 68 | 43 | 4 | Donegal | ||||
| Portnola | 60 | 48 | 4 | Donegal | ||||
| Portobello | 18 | 93 | 12 | Donegal | ||||
| Portora Royal School | 22 | 44 | 18 | Fermanagh | ||||
| Portrush | 85 | 39 | 4 | Ballywillin | Antrim | T | ||
| Portstewart Point | 81 | 38 | 4 | Derry | ||||
| Portstewart Strand | 80 | 36 | 4 | Derry | ||||
| Portulla Wood | 48 | 46 | 21 | Down | ||||
| Portveva | 66 | 40 | 4 | Donegal | ||||
| Portwillin | 16 | 51 | 5 | Antrim | ||||
| Post Office Wood | 37 | 82 | 12 | Tyrone | ||||
| Pot Bridge | 75 | 15 | 8 | Derry | ||||
| Pottagh | 79 | 34 | x | Dunboe | Derry | T | ||
| Pottagh Bridge | 80 | 34 | 4 | Dunboe | Derry | |||
| Pottagh House | 79 | 34 | 4 | Dunboe | Derry | |||
| Potterswalls | 16 | 90 | 14 | Antrim | Antrim | T | ||
| Potterswalls Reservoir | 16 | 90 | 14 | Antrim | Antrim | |||
| Pottsden Island | 53 | 76 | 15 | Down | ||||
| Pound Bridge | 14 | 12 | 9 | Antrim | ||||
| Pound Bridge | 61 | 69 | 19 | Tyrone | ||||
| Pound Burn | 28 | 54 | 20 | Down | ||||
| Pound Burn | 34 | 86 | 15 | Antrim | ||||
| Pound River | 5 | 59 | 20 | Armagh | ||||
| Pound Town | 64 | 40 | 4 | Donegal | ||||
| Pound, The | 58 | 55 | 21 | Down | ||||
| Powderly | 23 | 97 | 6 | Donegal | ||||
| Powderly Lower | 23 | 98 | 12 | Donegal | ||||
| Powderly Upper | 23 | 97 | 12 | Donegal | ||||
| Power Station | 44 | 88 | 15 | Antrim | ||||
| Preagh Bridge | 45 | 59 | 21 | Down | ||||
| Preagh Hill | 44 | 58 | 21 | Down | ||||
| Prehen | 41 | 13 | 7 | Clondermot | Derry | T | ||
| Presbyterian Bridge | 39 | 4 | 7 | Tyrone | ||||
| President Wilson's Home | 37 | 96 | 12 | Tyrone | ||||
| Pretty Mary's Fort | 14 | 59 | 20 | Down | ||||
| Priest Hill | 11 | 9 | 9 | Antrim | ||||
| Priest Hill | 22 | 60 | 20 | Down | ||||
| Priest Town | 57 | 54 | 21 | Ardquin | Down | T | ||
| Priest's Bridge | 36 | 77 | 12 | Tyrone | ||||
| Priest's Town | 34 | 64 | 18 | Tyrone | ||||
| Priestown | 19 | 2 | 6 | Convoy | Donegal | T | ||
| Priests Bridge | 43 | 59 | 21 | Down | ||||
| Priests Burn | 20 | 8 | 9 | Antrim | ||||
| Priests Hill | 24 | 71 | 14 | Antrim | ||||
| Priests Town | 19 | 88 | 14 | Antrim | ||||
| Priestsessagh | 27 | 87 | 12 | Ardstraw | Tyrone | T | ||
| Prieststown | 1 | 0 | 8 | Antrim | ||||
| Priesttown | 2 | 96 | 6 | Donegal | ||||
| Primacy, The | 51 | 79 | 15 | Down | ||||
| Primity | 41 | 12 | 7 | Clondermot | Derry | T | ||
| Primrose Cottage | 22 | 50 | 20 | Down | ||||
| Primrose Mount | 7 | 92 | 14 | Antrim | ||||
| Prince Of Wales Bridge | 82 | 75 | 13 | Tyrone | ||||
| Priory, The | 82 | 73 | 13 | Tyrone | ||||
| Pritchards Bridge | 11 | 61 | 20 | Down | ||||
| Prockils | 13 | 20 | 6 | Kilmacrenan | Donegal | T | ||
| Procklis | 5 | 96 | 14 | Drummaul | Antrim | T | ||
| Procklis | 6 | 11 | 6 | Conwal | Donegal | T | ||
| Procklis Bridge | 13 | 20 | 6 | Kilmacrenan | Donegal | |||
| Prolusk | 2 | 40 | 5 | Ballintoy | Antrim | T | ||
| Prolusk | 50 | 53 | 18 | Clogher | Tyrone | T | ||
| Promontory Fort | 22 | 25 | 5 | Antrim | ||||
| Promontory Fort | 30 | 24 | 9 | Antrim | ||||
| Promontory Fort | 31 | 23 | 6 | Donegal | ||||
| Promontory Fort | 31 | 23 | 7 | Donegal | ||||
| Promontory Fort | 33 | 6 | 9 | Antrim | ||||
| Promontory Fort | 76 | 35 | 4 | Derry | ||||
| Prospect | 31 | 93 | x | Urney | Tyrone | T | ||
| Prospect | 37 | 7 | 7 | Tyrone | ||||
| Prospect | x | Ballymoney | Antrim | T | ||||
| Prospect Hall | 10 | 62 | 20 | Antrim | ||||
| Prospect Hill | 6 | 92 | 14 | Antrim | ||||
| Prospect House | 3 | 48 | 20 | Armagh | ||||
| Prospect House | 21 | 53 | 18 | Fermanagh | ||||
| Prospect House | 25 | 77 | 15 | Antrim | ||||
| Prospect House | 45 | 54 | 21 | Down | ||||
| Prospect, Mount | 67 | 7 | 7 | Derry | ||||
| Providence House | 9 | 60 | 20 | Armagh | ||||
| Prudysburn | 33 | 67 | 15 | Down | ||||
| Pruglish | 28 | 72 | 12 | Longfield West | Tyrone | T | ||
| Pubble | 40 | 86 | x | Ardstraw | Tyrone | T | ||
| Pubble | 58 | 13 | 7 | Derry | ||||
| Pubble Bridge | 34 | 46 | 18 | Fermanagh | ||||
| Pubble Forest | 33 | 46 | 18 | Fermanagh | ||||
| Pubble Hill | 39 | 86 | 12 | Ardstraw | Tyrone | |||
| Pullans Mountain | 21 | 86 | 12 | Tyrone | ||||
| Pullans North | 90 | 29 | 4 | Kildollagh | Derry | T | ||
| Pullans North | 90 | 29 | 5 | Kildollagh | Derry | T | ||
| Pullans North | 90 | 29 | 8 | Kildollagh | Derry | T | ||
| Pullans South | 89 | 29 | 4 | Derry | ||||
| Pullans South | 89 | 29 | 8 | Derry | ||||
| Pullasnaght | 23 | 86 | 12 | Tyrone | ||||
| Pullateebee | 44 | 98 | 12 | Leckpatrick | Tyrone | T | ||
| Pullyarrynawan | 8 | 84 | 12 | Tyrone | ||||
| Pullyernan | 22 | 87 | x | Urney | Tyrone | T | ||
| Pullyernan Burn | 22 | 86 | 12 | Urney | Tyrone | |||
| Pullyernan Hill | 22 | 87 | 12 | Urney | Tyrone | |||
| Pullytean | 15 | 77 | 12 | Tyrone | ||||
| Pulpit Hill | 46 | 48 | 18 | Tyrone | ||||
| Puntawanish Burn | 78 | 7 | 8 | Derry | ||||
| Purdonspark | 18 | 92 | 12 | Donegal | ||||
| Purdys Burn | 34 | 67 | 15 | Down | ||||
| Purdys Burn | 34 | 67 | 20 | Down | ||||
| Purdysburn | 33 | 67 | 20 | Down | ||||
| Purses Town | 96 | 1 | 8 | Derry | ||||
| Quailswood | 17 | 68 | 20 | Antrim | ||||
| Quakerstown | 20 | 81 | 14 | Antrim | ||||
| Quality Row | 35 | 93 | 12 | Tyrone | ||||
| Quarry Corner | 43 | 74 | 15 | Down | ||||
| Quarry Hill | 15 | 63 | 20 | Antrim | ||||
| Quarry Hill | 61 | 40 | 4 | Donegal | ||||
| Quarry Park | 42 | 99 | 12 | Tyrone | ||||
| Quarry Point | 21 | 48 | 18 | Fermanagh | ||||
| Quarrytown | 12 | 8 | 9 | Antrim | ||||
| Quarter | 88 | 83 | 14 | Derry | ||||
| Quarter Cormick | 47 | 42 | x | Down | Down | T | ||
| Quarter Cottage | 52 | 40 | 21 | Down | ||||
| Quarter Lenagh | x | Antrim | Antrim | T | ||||
| Quarter, The | 87 | 16 | 8 | Derry | ||||
| Quarterland | 22 | 74 | 14 | Antrim | ||||
| Quarterland | 34 | 90 | 15 | Antrim | ||||
| Quarterland | 52 | 58 | 21 | Killinchy | Down | T | ||
| Quartertown | 61 | 58 | 21 | Down | ||||
| Quaw Bridge | 95 | 15 | 8 | Antrim | ||||
| Quay | 47 | 22 | 7 | Derry | ||||
| Quay Port | 51 | 34 | 21 | Down | ||||
| Quay Rocks | 64 | 64 | 21 | Down | ||||
| Queen's Island | 35 | 75 | 15 | Down | ||||
| Queens Port | 64 | 39 | 4 | Donegal | ||||
| Quiggery Water | 45 | 65 | 18 | Tyrone | ||||
| Quiggy | 61 | 92 | 13 | Bodoney Upper | Tyrone | T | ||
| Quiggy Hill | 61 | 91 | 13 | Tyrone | ||||
| Quigley Point | 34 | 24 | 7 | Donegal | ||||
| Quigleytown | 58 | 67 | 18 | Tyrone | ||||
| Quilley Head | 81 | 32 | 4 | Derry | ||||
| Quilley, Lower | 80 | 33 | 4 | Dunboe | Derry | T | ||
| Quilley, Upper | 80 | 32 | 4 | Dunboe | Derry | |||
| Quilly | 18 | 52 | 20 | Down | T | |||
| Quilly | 85 | 86 | 14 | Desertlyn | Derry | T | ||
| Quilly Cottage | 16 | 51 | 20 | Down | ||||
| Quilly House | 18 | 52 | 20 | Down | ||||
| Quintin Bay | 63 | 50 | 21 | Down | ||||
| Quintin House | 62 | 50 | 21 | Down | ||||
| Quintinmanus | 80 | 66 | x | Tullyniskan | Tyrone | T | ||
| Quoile | 19 | 15 | 9 | Skerry | Antrim | T | ||
| Quoile | 49 | 46 | 21 | Saul | Down | T | ||
| Quoile Barrage | 50 | 49 | 21 | Down | ||||
| Quoile Bridge | 48 | 46 | 21 | Down | ||||
| Quoile River | 47 | 44 | 21 | Down | ||||
| Quolie Reserviour No 1 | 17 | 13 | 9 | Antrim | ||||
| Quolie Reserviour No 2 | 18 | 13 | 9 | Antrim | ||||
| Quolie Water | 17 | 12 | 9 | Antrim | ||||
| Qusw Burn | 95 | 15 | 8 | Antrim |