| Feature | X | Y | Map | AKA | Parish | County | Type | Feature Meaning |
| Sackwater Bridge | 95 | 19 | 8 | Antrim | ||||
| Saddle, The | 45 | 11 | 9 | Antrim | ||||
| Sadlers Wood | 37 | 82 | 12 | Tyrone | ||||
| Saggarthadooish | 99 | 21 | 6 | Donegal | ||||
| Saint Cunning | 35 | 9 | 9 | Carncastle | Antrim | T | ||
| Saint John's Point | 52 | 33 | 21 | Down | ||||
| Saint Johnstown | 34 | 9 | 6 | Taughboyne | Donegal | T | ||
| Saint Johnstown | 34 | 9 | 7 | Taughboyne | Donegal | T | ||
| Saintfield | 40 | 58 | 21 | Down | ||||
| Saints Island | 7 | 74 | 12 | Templecarn | Donegal | T | ||
| Salach, Lough | 96 | 16 | 6 | Donegal | ||||
| Sale's Corner | 24 | 68 | 20 | Antrim | ||||
| Salem Lodge | 86 | 56 | 19 | Armagh | ||||
| Salestown | 27 | 82 | 15 | Antrim | ||||
| Sallagh | 34 | 5 | 9 | Carncastle | Antrim | T | ||
| Sallagh, Lough | 10 | 80 | 12 | Tyrone | ||||
| Sallagh, Lough | 96 | 16 | 6 | Donegal | ||||
| Sallaghagrane | 15 | 11 | 6 | Conwal | Donegal | T | ||
| Sallaghbraes | 34 | 5 | 9 | Antrim | ||||
| Salloon | 26 | 53 | 18 | Magheracross | Fermanagh | T | ||
| Sallowilly | 53 | 3 | 7 | Cumber Upper | Derry | T | ||
| Sallowilly Lower | 53 | 3 | 7 | Cumber Upper | Derry | |||
| Sally Hill | 37 | 46 | 18 | Fermanagh | ||||
| Sally Wood | 16 | 91 | x | Donaghmore | Donegal | T | ||
| Sallybrook | 27 | 11 | 6 | Donegal | ||||
| Sallyvilla Cotage | 85 | 8 | 8 | Derry | ||||
| Salmon Hatachery | 78 | 17 | 8 | Derry | ||||
| Salmon Leap | 52 | 6 | 7 | Derry | ||||
| Salmon Port | 25 | 33 | 5 | Antrim | ||||
| Salmon Rock | 24 | 28 | 5 | Antrim | ||||
| Salry | 25 | 51 | 18 | Magheracross | Fermanagh | T | ||
| Salt Island | 52 | 50 | 21 | Down | ||||
| Salt Mines | 42 | 89 | 15 | Antrim | ||||
| Salt Mines | 43 | 89 | 15 | Antrim | ||||
| Salt Works | x | Faughanvale | Derry | T | ||||
| Salters Castle | 95 | 82 | 14 | Derry | ||||
| Salters Grange | 88 | 48 | 19 | Armagh | ||||
| Salterstown | 94 | 82 | 14 | Derry | ||||
| Saltwater Bridge | 60 | 58 | 21 | Down | ||||
| Sampson's Meml Twr | 65 | 23 | 7 | Derry | ||||
| Sampson's Memorial Tower | 65 | 23 | 4 | Derry | ||||
| Sanaghanroe | 78 | 57 | 19 | Clonfeacle | Tyrone | T | ||
| Sand Point | 48 | 26 | 7 | Donegal | ||||
| Sand Rock | 55 | 58 | 21 | Down | ||||
| Sand Rock | 57 | 60 | 21 | Down | ||||
| Sand Rock Pladdy | 57 | 60 | 21 | Down | ||||
| Sandeel Bay | 55 | 83 | 15 | Down | ||||
| Sandholes | 78 | 72 | 13 | Tyrone | ||||
| Sandville | 39 | 5 | 7 | Donaghedy | Tyrone | T | ||
| Sandy Bay | 11 | 71 | 14 | Antrim | ||||
| Sandy Bay | 56 | 82 | 15 | Down | ||||
| Sandy Bay | 57 | 82 | 15 | Down | ||||
| Sandy Bay Beach | 41 | 3 | 9 | Antrim | ||||
| Sandy Braes | 20 | 95 | 14 | Antrim | ||||
| Sandy Braes | 20 | 95 | 9 | Antrim | ||||
| Sandy Hill | 1 | 47 | 20 | Armagh | ||||
| Sandy Land | 65 | 62 | 21 | Down | ||||
| Sandy Mount | 97 | 98 | 14 | Derry | ||||
| Sandy Row | 84 | 77 | 13 | Derry | ||||
| Sandybay Point | 11 | 71 | 14 | Antrim | ||||
| Sandymount | 27 | 88 | 15 | Antrim | ||||
| Sandymount | 28 | 66 | 15 | Down | ||||
| Sandymount | 28 | 66 | 20 | Down | ||||
| Sandymount | 90 | 49 | 19 | Armagh | ||||
| Sandyville | 68 | 35 | 4 | Derry | ||||
| Saugh Island | 0 | 10 | 8 | Antrim | ||||
| Saugh Yard | 21 | 52 | 20 | Down | ||||
| Saughyards | 11 | 97 | 9 | Antrim | ||||
| Saughyards | 18 | 98 | 14 | Antrim | ||||
| Saughyards | 18 | 98 | 9 | Antrim | ||||
| Saul | 50 | 45 | 21 | Down | ||||
| Saul | 51 | 46 | 21 | Saul | Down | T | ||
| Saul Quarter | 49 | 43 | x | Down | Down | T | ||
| Saville Park | 72 | 79 | 13 | Tyrone | ||||
| Saw Mill | 4 | 12 | 8 | Antrim | ||||
| Saw Mills | 12 | 95 | 12 | Donegal | ||||
| Saw Mills | 68 | 22 | 4 | Derry | ||||
| Saw Mills | 68 | 22 | 7 | Derry | ||||
| Sawel Mountain | 61 | 97 | 13 | Tyrone | ||||
| Sawelabeg | 64 | 93 | 13 | Bodoney Upper | Tyrone | T | ||
| Sawelabeg Forest | 65 | 93 | 13 | Tyrone | ||||
| Sawmill | 92 | 24 | 4 | Antrim | ||||
| Sawmill | 92 | 24 | 8 | Antrim | ||||
| Sawmills | 90 | 21 | 4 | Derry | ||||
| Sawmills | 90 | 21 | 8 | Derry | ||||
| Sawney's Hill | 38 | 42 | 18 | Fermanagh | ||||
| Sawneys Hill | 28 | 56 | 18 | Tyrone | ||||
| Scab Island | 97 | 94 | 14 | Ballyscullion | Derry | T | ||
| Scaddin | 53 | 48 | 21 | Down | ||||
| Scaddy | 49 | 49 | 21 | Down | ||||
| Scaddy Island | 92 | 65 | 19 | Clonloe | Tyrone | T | ||
| Scallan River | 96 | 4 | 6 | Donegal | ||||
| Scallen | 25 | 57 | 18 | Kilskeery | Tyrone | T | ||
| Scallion Hill | 24 | 44 | 20 | Down | ||||
| Scalp | 63 | 74 | 13 | Tyrone | ||||
| Scalp Mountain | 40 | 26 | 7 | Donegal | ||||
| Scalty | x | Aghadowey | Derry | T | ||||
| Scarabo | 47 | 72 | x | Newtownards | Down | T | ||
| Scarabo Hill | 47 | 72 | 21 | Down | ||||
| Scarbo Country Park | 47 | 72 | 21 | Down | ||||
| Scardan Burn | 75 | 4 | 8 | Derry | ||||
| Scardanmore | 19 | 31 | 5 | Antrim | ||||
| Scarford Bridge | 39 | 44 | 18 | Fermanagh | ||||
| Scarva | 6 | 43 | 20 | Down | ||||
| Scarva House | 6 | 42 | 20 | Down | ||||
| Scarva Lough | 6 | 44 | 20 | Armagh | ||||
| Scarvagherin | 30 | 84 | 12 | Ardstraw | Tyrone | T | ||
| Scaryhill | 27 | 20 | 9 | Ardclinis | Antrim | T | ||
| Scawt Hill | 33 | 8 | 9 | Antrim | ||||
| Schall, The | 64 | 9 | 7 | Derry | ||||
| Schoolhill | 39 | 56 | 20 | Down | ||||
| Scion Hill | 24 | 49 | 20 | Down | ||||
| Scolboa | 19 | 91 | 14 | Connor | Antrim | T | ||
| Scollogs Hill | 47 | 37 | 21 | Down | ||||
| Scollogstown | 47 | 37 | 21 | Down | ||||
| Scollop, The | 90 | 8 | 8 | Derry | ||||
| Sconce | 77 | 30 | 4 | Formoyle | Derry | T | ||
| Sconce Hill | 76 | 29 | 4 | Formoyle | Derry | |||
| Sconce Hill | 76 | 29 | 8 | Formoyle | Derry | |||
| Scoot Hill | 34 | 67 | 15 | Down | ||||
| Scoot Hill | 34 | 67 | 20 | Down | ||||
| Scotch Boleran | 80 | 20 | 4 | Golds Town | Derry | |||
| Scotch Boleran | 80 | 20 | 8 | Golds Town | Derry | |||
| Scotch Cah Wood | 82 | 18 | 8 | Derry | ||||
| Scotch Hill | 73 | 71 | 13 | Tyrone | ||||
| Scotch Longfield | 84 | 91 | 13 | Derry | ||||
| Scotch Street | 96 | 55 | 19 | Armagh | ||||
| Scotch Town | 54 | 87 | 13 | Tyrone | ||||
| Scotchman, The | 51 | 49 | 21 | Down | ||||
| Scotchmans Rock | 59 | 49 | 21 | Down | ||||
| Scotchomerbane | 11 | 17 | 9 | Newtown Crommelin | Antrim | T | ||
| Scotchtown | 65 | 29 | 4 | Magilligan (Tamlaghtard) | Derry | T | ||
| Scotchtown | 65 | 29 | 7 | Magilligan (Tamlaghtard) | Derry | T | ||
| Scotchtown | 80 | 77 | x | Derryloran | Tyrone | T | ||
| Scotchtown | 93 | 80 | 14 | Derry | ||||
| Scoth Can | 82 | 18 | 8 | Derry | ||||
| Scoth Rock | 27 | 42 | 20 | Down | ||||
| Scotland | 23 | 96 | 6 | Donaghmore | Donegal | T | ||
| Scotstown | 19 | 75 | 14 | Antrim | ||||
| Scotstown | 30 | 93 | x | Urney | Tyrone | T | ||
| Scott's Bridge | 66 | 25 | 4 | Derry | ||||
| Scott's Bridge | 66 | 25 | 7 | Derry | ||||
| Scott's Rock | 78 | 25 | 8 | Derry | ||||
| Scotts Bridge | 23 | 69 | 20 | Antrim | ||||
| Scotts Hill | 58 | 79 | 15 | Down | ||||
| Scout Hill | 32 | 63 | 20 | Down | ||||
| Scrabo | 47 | 72 | x | Newtownards | Down | T | ||
| Scrabo Country Park | 47 | 72 | 15 | Down | ||||
| Scrabo Hill | 47 | 72 | 15 | Down | ||||
| Scraghy | 21 | 74 | 12 | Termonamongan | Tyrone | T | ||
| Scralea | 21 | 79 | 12 | Termonamongan | Tyrone | T | ||
| Screeby | 30 | 53 | 18 | Kilskeery | Tyrone | T | ||
| Screeby | 47 | 49 | 18 | Clogher | Tyrone | T | ||
| Screeby Hill | 38 | 43 | 18 | Fermanagh | ||||
| Screeby Lough | 46 | 49 | 18 | Tyrone | ||||
| Screeby Lower | 30 | 53 | 18 | Tyrone | ||||
| Screeby Upper` | 30 | 52 | 18 | Tyrone | ||||
| Screggagh | 43 | 57 | 18 | Donacavey | Tyrone | T | ||
| Scrib | 37 | 44 | 20 | Down | T | |||
| Scribly | 17 | 10 | 6 | Leck | Donegal | T | ||
| Scriggan | 69 | 11 | 7 | Dungiven | Derry | T | ||
| Scriggan Burn | 69 | 11 | 7 | Dungiven | Derry | |||
| Scrogg, The | 7 | 49 | 20 | Down | ||||
| Scroggy Bridge | 92 | 21 | 4 | Antrim | ||||
| Scroggy Bridge | 93 | 21 | 8 | Antrim | ||||
| Scroggy Hill | 45 | 60 | 21 | Down | ||||
| Scroggystown | 14 | 94 | 14 | Antrim | ||||
| Scudion Craig | 89 | 38 | 4 | Antrim | ||||
| Scullionstown | 1 | 99 | 14 | Antrim | ||||
| Scullionstown | 90 | 85 | 14 | Derry | ||||
| Sea Gull Isle | x | Billy | Antrim | T | ||||
| Sea View | 50 | 65 | 15 | Down | ||||
| Sea View | 50 | 65 | 21 | Down | ||||
| Seaaia | 81 | 67 | x | Tullyniskan | Tyrone | T | ||
| Seacash | x | Killead | Antrim | T | ||||
| Seacon Beg | 92 | 28 | 4 | Ballymoney | Antrim | T | ||
| Seacon Beg | 92 | 28 | 5 | Ballymoney | Antrim | T | ||
| Seacon Beg | 92 | 28 | 8 | Ballymoney | Antrim | |||
| Seacon High | 91 | 28 | 4 | Ballymoney | Antrim | |||
| Seacon High | 91 | 28 | 5 | Ballymoney | Antrim | |||
| Seacon High | 91 | 28 | 8 | Ballymoney | Antrim | |||
| Seacon Lower | 91 | 28 | 5 | Ballymoney | Antrim | |||
| Seacon Lower | 91 | 28 | 8 | Ballymoney | Antrim | |||
| Seacon Lower | 91 | 28 | x | Ballymoney | Derry | T | ||
| Seacon More | 91 | 28 | x | Ballymoney | Derry | T | ||
| Seacon More | 91 | 28 | x | Ballymoney | Antrim | T | ||
| Seacon North | 90 | 28 | 5 | Ballymoney | Derry | |||
| Seacon North | 90 | 28 | 8 | Ballymoney | Derry | |||
| Seacor | 6 | 10 | 6 | Conwal | Donegal | T | ||
| Seacourt | 39 | 4 | 9 | Antrim | ||||
| Seadavog Mountain | 6 | 72 | 12 | Templecarn | Donegal | T | ||
| Seafin Lough | 12 | 72 | 12 | Donegal | ||||
| Seaforde | 40 | 41 | 21 | Down | ||||
| Seaforde Demesne | 40 | 43 | x | Loughinisland | Down | T | ||
| Seaforde House | 40 | 43 | 21 | Down | ||||
| Seagull Rock | 92 | 42 | 4 | Antrim | ||||
| Seagull Rock | 92 | 42 | 5 | Antrim | ||||
| Seal Rock | 29 | 19 | 9 | Antrim | ||||
| Seamount | 46 | 90 | 15 | Antrim | ||||
| Seapark House | 39 | 85 | 15 | Antrim | ||||
| Seapatrick | 12 | 47 | 20 | Down | ||||
| Seaport Lodge | 91 | 42 | 4 | Antrim | ||||
| Seaport Lodge | 91 | 42 | 5 | Antrim | ||||
| Seavaghan | 42 | 47 | 21 | Loughinisland | Down | T | ||
| Seaview Farm | 52 | 73 | 15 | Down | ||||
| Seaview Farm | 52 | 73 | 21 | Down | ||||
| Seaview House | 51 | 72 | 15 | Down | ||||
| Seaview House | 51 | 72 | 21 | Down | ||||
| Seawright's Hill | 97 | 99 | 14 | Derry | ||||
| Secon North | 90 | 28 | 4 | Derry | ||||
| Sedennan | 44 | 70 | x | Drumragh | Tyrone | T | ||
| Seeconnell | 32 | 42 | 20 | Down | ||||
| Seeconnell Centre | 33 | 42 | 20 | Down | ||||
| Seefin | 5 | 97 | 12 | Donegal | ||||
| Seefin | 81 | 2 | 8 | Derry | ||||
| Seegronan | 1 | 78 | x | Termonamongan | Tyrone | T | ||
| Seegronan Hill | 19 | 78 | 12 | Termonamongan | Tyrone | |||
| Seein | 33 | 92 | 12 | Urney | Tyrone | T | ||
| Seein Bridge | 34 | 91 | 12 | Tyrone | ||||
| Seemullan | 46 | 87 | 13 | Tyrone | ||||
| Segully | 33 | 71 | 12 | Longfield East | Tyrone | T | ||
| Selk Rock | 54 | 54 | 21 | Down | ||||
| Selk Rock | 56 | 65 | 15 | Down | ||||
| Selk Rock | 56 | 65 | 21 | Down | ||||
| Selk Rock | 57 | 52 | 21 | Down | ||||
| Selk Rock | 66 | 60 | 21 | Down | ||||
| Selshan Bridge | 8 | 68 | 20 | Antrim | ||||
| Selshan Drain | 10 | 68 | 20 | Antrim | ||||
| Selshan Harbour | 8 | 67 | 20 | Antrim | ||||
| Selshion | 99 | 55 | 19 | Armagh | ||||
| Semicock | 94 | 27 | 4 | Ballymoney | Antrim | T | ||
| Semicock | 94 | 27 | 5 | Ballymoney | Antrim | T | ||
| Semicock | 94 | 27 | 8 | Ballymoney | Antrim | T | ||
| Semples Bridge | 37 | 84 | 12 | Tyrone | ||||
| Seneirl | 93 | 36 | 4 | Dunluce | Antrim | T | ||
| Seneirl | 93 | 36 | 5 | Dunluce | Antrim | T | ||
| Seneirl Bridge | 94 | 35 | 4 | Dunluce | Antrim | |||
| Seneirl Bridge | 94 | 35 | 5 | Dunluce | Antrim | |||
| Sentry Box, The | 15 | 41 | 20 | Down | ||||
| Sentry Hill | 10 | 4 | 9 | Antrim | ||||
| Sentry Hill | 15 | 73 | 14 | Antrim | ||||
| Sentry Hill | 30 | 84 | 15 | Antrim | ||||
| Sentry Hill | 36 | 95 | 9 | Antrim | ||||
| Sentry Hill | 37 | 0 | 7 | Tyrone | ||||
| Sentry Hill | 37 | 90 | 12 | Tyrone | ||||
| Sentry Hill | 38 | 2 | 7 | Tyrone | ||||
| Sentry Hill | 40 | 11 | 7 | Derry | ||||
| Sentry Hill | 51 | 41 | 21 | Down | ||||
| Seskinamaddy | 34 | 90 | 15 | Antrim | ||||
| Seskinore | 48 | 63 | 18 | Seskinoe, Shaskanoure | Clogherny | Tyrone | T | Grey Marsh |
| Seskinore Bridge | 48 | 63 | 18 | Tyrone | ||||
| Seskinore Forest | 48 | 63 | 18 | Tyrone | ||||
| Seskinore Mill Bridge | 47 | 63 | 18 | Tyrone | ||||
| Sesnacully | 24 | 1 | 6 | Raphoe | Donegal | T | ||
| Sesnagh | 66 | 20 | 4 | Tamlaght Finlagan | Derry | T | ||
| Sesnagh | 66 | 20 | 7 | Tamlaght Finlagan | Derry | T | ||
| Sess | 44 | 49 | 18 | Tyrone | ||||
| Sess | 59 | 56 | 18 | Clogher | Tyrone | T | ||
| Sess | 59 | 56 | 18 | Errigal Keerogue | Tyrone | T | ||
| Sess Hill | 51 | 65 | 18 | Tyrone | ||||
| Sess Kilgreen | 59 | 58 | x | Errigal Keerogue | Tyrone | T | ||
| Sessagh of Gallan | 40 | 89 | x | Ardstraw | Tyrone | T | ||
| Sessia | 56 | 52 | x | Clogher | Tyrone | T | ||
| Sessia | 83 | 74 | 13 | Tyrone | ||||
| Sessia | 89 | 78 | x | Arboe | Tyrone | T | ||
| Sessia (Conyngham) | 96 | 76 | 14 | Arboe | Tyrone | T | ||
| Sessia Lodge | 72 | 65 | 19 | Tyrone | ||||
| Sessiadonaghy | 69 | 65 | 19 | Pomeroy | Tyrone | T | ||
| Sessiagh | 26 | 97 | 6 | Donaghmore | Donegal | T | ||
| Sessiagh | 27 | 57 | 18 | Tyrone | ||||
| Sessiagh | 36 | 90 | 12 | Tyrone | ||||
| Sessiagh | 44 | 64 | 18 | Donacavey | Tyrone | T | ||
| Sessiagh | 82 | 71 | x | Donaghenry | Tyrone | T | ||
| Sessiagh (Allison, Long & O'Neil ) | 13 | 93 | x | Donaghmore | Donegal | T | ||
| Sessiagh (Lindesay) | 83 | 74 | x | Desertcreat | Tyrone | T | ||
| Sessiagh (Scott) | 74 | 72 | x | Desertcreat | Tyrone | T | ||
| Sessiagh Bridge | 45 | 64 | 18 | Tyrone | ||||
| Sessiagh Hill | 74 | 72 | 13 | Tyrone | ||||
| Sessiagh O'Neil Bridge | 13 | 93 | 12 | Donaghmore | Donegal | |||
| Sessiaghkeelta Upper | 11 | 71 | 12 | Templecarn | Donegal | T | ||
| Sessiaghmore | 13 | 93 | 12 | Donegal | ||||
| Sessiaghmore | 25 | 97 | 12 | Donegal | ||||
| Sessiaghs | 26 | 54 | 18 | Magheragart | Dromore | Tyrone | T | |
| Sessiamagaroll | 81 | 53 | x | Clonfeacle | Tyrone | T | ||
| Sesslagh Hill | 36 | 60 | 18 | Tyrone | ||||
| Seven Acre Hill | 2 | 25 | 5 | Antrim | ||||
| Seven Acre Hill | 2 | 25 | 8 | Antrim | ||||
| Seven Acres | 6 | 30 | 5 | Antrim | ||||
| Seven Caves | 48 | 98 | 9 | Antrim | ||||
| Seygorry | 84 | 20 | 4 | Aghadowey | Derry | T | ||
| Seygorry | 84 | 20 | 8 | Aghadowey | Derry | T | ||
| Seyloran | 84 | 59 | x | Clonfeacle | Tyrone | T | ||
| Seymour Hill | 29 | 67 | 15 | Antrim | ||||
| Seymour Hill | 29 | 67 | 20 | Antrim | ||||
| Shallow Flat, The | 99 | 64 | 19 | Armagh | ||||
| Shamrock Island | 52 | 60 | 21 | Down | ||||
| Shamrock Lodge | 52 | 77 | 15 | Down | ||||
| Shanaghan | 90 | 97 | 14 | Derry | ||||
| Shanaghy | 17 | 77 | x | Termonamongan | Tyrone | T | ||
| Shanaghy Bridge | 17 | 77 | 12 | Termonamongan | Tyrone | |||
| Shanaghy Bridge | 94 | 7 | 8 | Derry | ||||
| Shanaghy Burn | 16 | 75 | 12 | Termonamongan | Tyrone | |||
| Shanaghy Upper | 92 | 18 | 8 | Artiforty | Finvoy | Antrim | T | |
| Shanalurg | 69 | 53 | x | Carnteel | Tyrone | T | ||
| Shanbally | 38 | 42 | 20 | Down | ||||
| Shanboy | 27 | 81 | 15 | Antrim | ||||
| Shanco | 33 | 43 | 18 | Fermanagh | ||||
| Shanco | 54 | 49 | x | Clogher | Tyrone | T | ||
| Shanco | 66 | 45 | 19 | Monaghan | ||||
| Shanco Hill | 53 | 49 | 18 | Tyrone | ||||
| Shanco Mountain | 54 | 49 | 18 | Tyrone | ||||
| Shandon | 38 | 72 | 15 | Down | ||||
| Shane Barnagh's Lough | 52 | 43 | 18 | Tyrone | ||||
| Shane Barnagh's Sentry Box | 66 | 68 | 19 | Tyrone | ||||
| Shane Barnagh's Stables | 52 | 43 | 18 | Tyrone | ||||
| Shane's Hill | 33 | 98 | 9 | Antrim | ||||
| Shane's Lough | 50 | 52 | 21 | Down | ||||
| Shane's Viaduct | 8 | 89 | 14 | Drummaul | Antrim | |||
| Shane's Wood | 50 | 52 | 21 | Down | ||||
| Shanecracken | 98 | 41 | 19 | Armagh | ||||
| Shaneglish | 4 | 41 | 20 | Armagh | T | |||
| Shanemullagh | x | Magherafelt | Derry | T | ||||
| Shanenknock | 26 | 15 | 6 | Donegal | ||||
| Shaneoguestown | 18 | 84 | 14 | Grange of Muckamore | Antrim | T | ||
| Shanes | 8 | 29 | 5 | Antrim | ||||
| Shanes | 8 | 29 | 8 | Loughguile | Antrim | T | ||
| Shanes | 10 | 30 | 5 | Loughguile | Antrim | T | ||
| Shanes Castle | 10 | 88 | 14 | Antrim | Antrim | T | ||
| Shanes Castle | 11 | 87 | 14 | Antrim | Antrim | |||
| Shanes Castle Park | 13 | 87 | 14 | Drummaul | Antrim | T | ||
| Shanes Hill | 6 | 53 | 20 | Down | ||||
| Shaninish | 20 | 30 | 5 | Antrim | ||||
| Shank Bridge | 12 | 98 | 14 | Antrim | ||||
| Shank Bridge | 12 | 98 | 9 | Antrim | ||||
| Shank Bridge | 20 | 99 | 9 | Antrim | ||||
| Shank Bridge | 21 | 99 | 14 | Antrim | ||||
| Shanker Birn | 16 | 55 | 20 | Down | ||||
| Shankerburn Bridge | 17 | 56 | 20 | Down | ||||
| Shankey Bridge | 84 | 72 | 13 | Donaghenry | Tyrone | |||
| Shankill | 26 | 46 | 18 | Fermanagh | ||||
| Shankill | 32 | 75 | 15 | Antrim | ||||
| Shanliss Lower | 85 | 68 | x | Clonloe | Tyrone | T | ||
| Shanliss Upper | 85 | 68 | x | Clonloe | Tyrone | T | ||
| Shanlongford | 80 | 21 | x | Aghadowey | Derry | T | ||
| Shanlongford Bridge | 80 | 21 | 4 | Aghadowey | Derry | |||
| Shanlongford Bridge | 80 | 21 | 8 | Aghadowey | Derry | |||
| Shanmaghry | 70 | 68 | 19 | Pomeroy | Tyrone | T | ||
| Shanmoy | 77 | 55 | 19 | Clonfeacle | Tyrone | T | ||
| Shanmullagh | 25 | 79 | 12 | Tyrone | ||||
| Shanmullagh | 32 | 58 | 18 | Tyrone | ||||
| Shanmullagh | 63 | 48 | 19 | Monaghan | ||||
| Shanmullagh | 84 | 53 | 19 | Ballycullen | Clonfeacle | Armagh | ||
| Shanmullagh East | 31 | 58 | x | Kilskeery | Tyrone | T | ||
| Shanmullagh Glebe | 35 | 62 | x | Dromore | Tyrone | T | ||
| Shanmullagh West | 25 | 59 | 18 | Kilskeery | Tyrone | T | ||
| Shannagh | 26 | 1 | 6 | Raphoe | Donegal | T | ||
| Shannagh Moor | 26 | 1 | 6 | Raphoe | Donegal | |||
| Shannaghan | 21 | 41 | 20 | Down | T | |||
| Shannaghan Hill | 21 | 40 | 20 | Down | ||||
| Shannaragh | 38 | 64 | 18 | Dromore | Tyrone | T | ||
| Shanney's Hill | 86 | 13 | 8 | Derry | ||||
| Shannon (Lower & Middle) | 28 | 98 | 6 | Clonleigh | Donegal | T | ||
| Shannon (Lower & Middle) | 28 | 98 | 12 | Clonleigh | Donegal | T | ||
| Shannon Rock | 28 | 98 | 12 | Donegal | ||||
| Shannonstown | 32 | 94 | 15 | Antrim | ||||
| Shanog | 24 | 79 | 12 | Ardstraw | Tyrone | T | ||
| Shanonny | 37 | 88 | 12 | Ardstraw | Tyrone | |||
| Shanonny Bridge | 43 | 89 | 12 | Ardstraw | Tyrone | |||
| Shanonny East | 42 | 88 | x | Ardstraw | Tyrone | T | ||
| Shanonny West | 37 | 89 | x | Ardstraw | Tyrone | T | ||
| Shanreagh | x | Tamlaght Finlagan | Derry | T | ||||
| Shanrod Cross Roads | 21 | 45 | 20 | Down | ||||
| Shanrod House | 20 | 44 | 20 | Down | ||||
| Shanrod Lough | 21 | 45 | 20 | Down | ||||
| Shantallow | 43 | 20 | 7 | Templemore | Derry | T | ||
| Shantavny | 64 | 52 | 19 | Carnteel | Tyrone | T | ||
| Shantavny Irish | 59 | 61 | 18 | Errigal Keerogue | Tyrone | T | ||
| Shantavny Scotch | 58 | 60 | 18 | Errigal Keerogue | Tyrone | T | ||
| Shantonagh | 47 | 52 | 18 | Clogher | Tyrone | T | ||
| Shanvey | 68 | 28 | 4 | Aghanloo | Derry | T | ||
| Shanvey | 68 | 28 | 7 | Aghanloo | Derry | T | ||
| Shanvin | 21 | 73 | 12 | Tyrone | ||||
| Shanvogues Burn | 11 | 95 | 9 | Antrim | ||||
| Shark Island | 54 | 50 | 21 | Down | ||||
| Shark, Lough | 6 | 41 | 20 | Down | ||||
| Sharon Glebe | 27 | 15 | 6 | Raymoghy | Donegal | T | ||
| Sharvogues | 10 | 95 | 14 | Drummaul | Antrim | T | ||
| Sharvogues | 10 | 95 | 9 | Drummaul | Antrim | T | ||
| Sharvogues Burn | 11 | 95 | 14 | Drummaul | Antrim | |||
| Shaw's Hill | 21 | 96 | 14 | Antrim | ||||
| Shaw's Hill | 21 | 96 | 9 | Antrim | ||||
| Shawfield | 46 | 91 | 15 | Antrim | ||||
| Shaws, The | 94 | 91 | 14 | Derry | ||||
| Sheafing Rock, The | 45 | 10 | 9 | Antrim | ||||
| Sheddings, The | 22 | 9 | 9 | Antrim | ||||
| Sheds, The | 79 | 20 | 4 | Derry | ||||
| Sheds, The | 79 | 20 | 8 | Derry | ||||
| Sheegy Island | x | Ballyscullion | Antrim | T | ||||
| Sheelah's Island | 57 | 64 | 21 | Down | ||||
| Sheemuldoon | 26 | 63 | 18 | Fermanagh | ||||
| Sheep Hill | 35 | 62 | 18 | Tyrone | ||||
| Sheep Hills | 94 | 0 | 8 | Derry | ||||
| Sheep Island | 4 | 45 | 5 | Ballintoy | Antrim | T | ||
| Sheep Mash | 64 | 29 | 7 | Tamlaght Finlagan | Derry | T | ||
| Sheep Mash | 64 | 29 | 4 | Tamlaght Finlagan | Derry | T | ||
| Sheep Point | 54 | 83 | 15 | Down | ||||
| Sheepfold | 10 | 28 | 5 | Antrim | ||||
| Sheepfold | 16 | 27 | 5 | Antrim | ||||
| Sheepfold | 54 | 96 | 13 | Tyrone | ||||
| Sheepheads | 29 | 79 | 15 | Antrim | ||||
| Sheeplair | 23 | 93 | 14 | Antrim | ||||
| Sheepland Beg | 57 | 39 | x | Dunsfort | Down | T | ||
| Sheepland Harbour | 58 | 38 | 21 | Down | ||||
| Sheepland More | 58 | 40 | x | Dunsfort | Down | T | ||
| Sheercloon | 29 | 0 | 6 | Clonleigh | Donegal | T | ||
| Sheildrum Hill | 98 | 9 | 8 | Antrim | ||||
| Sheilstown | 3 | 1 | 8 | Antrim | ||||
| Shelahs Hill | 47 | 4 | 7 | Tyrone | ||||
| Shellfield | 26 | 19 | 6 | Aughnish | Donegal | T | ||
| Sheltered Farm | 37 | 65 | 15 | Down | ||||
| Sheltered Farm | 37 | 65 | 20 | Down | ||||
| Shelton Bridge | 9 | 28 | 5 | Loughguile | Antrim | |||
| Shelton Bridge | 9 | 28 | 8 | Loughguile | Antrim | |||
| Shelton Burn | 9 | 28 | 5 | Loughguile | Antrim | |||
| Shelton North | 10 | 28 | 5 | Loughguile | Antrim | T | ||
| Shelton South | 11 | 27 | 5 | Loughguile | Antrim | |||
| Shepherds Leas | 39 | 84 | 12 | Tyrone | ||||
| Sheridan | 28 | 55 | x | Magheracross | Tyrone | T | ||
| Sheriffs Mountain | 40 | 17 | 7 | Templemore | Derry | T | Misspelled on Map 2 r's | |
| Sherrigrim | 81 | 70 | 13 | Donaghenry | Tyrone | T | ||
| Sherrigrim House | 80 | 70 | 13 | Tyrone | ||||
| Sherrywhirry | 30 | 0 | 9 | Antrim | ||||
| Sheskin | 7 | 5 | 6 | Donegal | ||||
| Sheskin Bridge | 78 | 2 | 8 | Derry | ||||
| Sheskin Burn | 5 | 0 | 6 | Donegal | ||||
| Sheskin Burn | 5 | 98 | 12 | Donegal | ||||
| Sheskin Burn | 77 | 1 | 8 | Derry | ||||
| Sheskin Burn | 99 | 17 | 8 | Antrim | ||||
| Sheskin Lough | 4 | 23 | 6 | Donegal | ||||
| Sheskin River | 56 | 18 | 7 | Derry | ||||
| Sheskinamaddy Bridge | 72 | 3 | 8 | Derry | ||||
| Sheskinamaddy Burn | 72 | 4 | 8 | Derry | ||||
| Sheskinapoll | 27 | 7 | 6 | Raymoghy | Donegal | T | ||
| Sheskinawaddy | 10 | 81 | 12 | Tyrone | ||||
| Sheskinmore | 9 | 99 | 6 | Donegal | ||||
| Sheskinmore | 9 | 99 | 12 | Donegal | ||||
| Sheskinshule | 60 | 82 | 13 | Seskinshule, Greencastle | Bodoney Lower | Tyrone | T | |
| Shewis | 93 | 46 | 19 | Armagh | ||||
| Shilanavogy | 25 | 4 | 9 | Racavan | Antrim | T | ||
| Shillanavogy Bridge | 24 | 4 | 9 | Antrim | ||||
| Shillanavogy Water | 25 | 5 | 9 | Antrim | ||||
| Shillanavogy Wood | 24 | 2 | 9 | Antrim | ||||
| Shillanmore | 34 | 46 | 18 | Fermanagh | ||||
| Shilling Hill | 42 | 44 | 18 | Fermanagh | ||||
| Shilvodan Grave Yard | 12 | 93 | 14 | Antrim | ||||
| Shinnagh, Lough | 11 | 89 | 12 | Donegal | ||||
| Shinny Bridge | 80 | 25 | 8 | Derry | ||||
| Shinny Water | 81 | 25 | 4 | Derry | ||||
| Shinny Water | 81 | 25 | 8 | Derry | ||||
| Shipperdowney Well | 28 | 88 | 15 | Antrim | ||||
| Shivey | 77 | 74 | 13 | Desertcreat | Tyrone | T | ||
| Shones Island | 52 | 49 | 21 | Down | ||||
| Shoptown | 23 | 99 | 14 | Antrim | ||||
| Shoptown | 23 | 99 | 9 | Antrim | ||||
| Shore Loney | 53 | 52 | 21 | Down | ||||
| Short Isle | 60 | 75 | 15 | Down | ||||
| Showerflood | 69 | 57 | 19 | Tyrone | ||||
| Shrigley | 51 | 53 | 21 | Down | ||||
| Sibs Stone | 24 | 71 | 14 | Antrim | ||||
| Sidaire | 24 | 53 | 18 | Magheracross | Fermanagh | T | ||
| Siddery Bay | 54 | 57 | 21 | Down | ||||
| Sillees River | 21 | 40 | 18 | Fermanagh | ||||
| Silver Birch | 26 | 87 | 15 | Antrim | ||||
| Silver Hill | 14 | 64 | 20 | Antrim | ||||
| Silver Hill | 25 | 82 | 12 | Tyrone | ||||
| Silver Hill | 88 | 79 | 14 | Derry | ||||
| Silver, Mount | 36 | 45 | 18 | Fermanagh | ||||
| Silverbrook Bridge | 44 | 0 | 7 | Tyrone | ||||
| Silverhill | 39 | 98 | 12 | Leckpatrick | Tyrone | T | ||
| Silverhill Bridge | 21 | 45 | 18 | Fermanagh | ||||
| Silverhill House | 21 | 45 | 18 | Fermanagh | ||||
| Silverwood | 6 | 59 | 20 | Armagh | ||||
| Simmy Island | 53 | 55 | 21 | Down | ||||
| Simpson Park | 27 | 81 | 12 | Tyrone | ||||
| Simpson's Fort | 16 | 56 | 20 | Down | ||||
| Sinclair's Corner | 81 | 72 | 13 | Tyrone | ||||
| Singleton, Fort | 66 | 46 | 19 | Monaghan | ||||
| Sion Hill | 23 | 58 | 20 | Down | ||||
| Sion Mills | 33 | 93 | 12 | Urney | Tyrone | |||
| Sir Thomas & Lady Dixon Park | 30 | 67 | 15 | Antrim | ||||
| Sir Thomas & Lady Dixon Park | 30 | 67 | 20 | Antrim | ||||
| Sistrakeel | 61 | 19 | 7 | Tamlaght Finlagan | Derry | T | ||
| Sistrakeel Bridge | 62 | 20 | 4 | Tamlaght Finlagan | Derry | |||
| Sistrakeel Bridge | 62 | 20 | 7 | Tamlaght Finlagan | Derry | |||
| Sistrakeel Top | 60 | 16 | 7 | Derry | ||||
| Sitalane | 35 | 92 | 15 | Antrim | ||||
| Six Mile Water | 20 | 85 | 14 | Antrim | ||||
| Six Mile Water | 29 | 92 | 15 | Antrim | ||||
| Six Mile Water | 33 | 96 | 9 | Antrim | ||||
| Six Mile Water Bridge | 23 | 87 | 14 | Antrim | ||||
| Six Road Ends | 53 | 78 | 15 | Down | ||||
| Six Road Ends | 63 | 59 | 21 | Down | ||||
| Six Towns, The | 72 | 90 | 13 | Derry | ||||
| Sixmilecross | 57 | 67 | 18 | Coroagh, Caragh, Ftinagh | Termonmaguirk | Tyrone | T | Caragh = a marshy place |
| Sixpenny Hill | 38 | 2 | 7 | Tyrone | ||||
| Sixtowns Lodge | 73 | 91 | 13 | Derry | ||||
| Sixty Acres | 33 | 1 | 6 | Clonleigh | Donegal | T | ||
| Sixty Acres | 33 | 1 | 7 | Clonleigh | Donegal | T | ||
| Size Hill | 28 | 89 | 15 | Antrim | ||||
| Skale, Lough | 30 | 44 | 18 | Fermanagh | ||||
| Skartrock Pladdy | 56 | 63 | 21 | Down | ||||
| Skate Rock | 54 | 51 | 21 | Down | ||||
| Skate Rock | 66 | 40 | 4 | Donegal | ||||
| Skateridge | 19 | 40 | 20 | Down | ||||
| Skea | 17 | 71 | 12 | Fermanagh | ||||
| Skea | 75 | 66 | x | Pomeroy | Tyrone | T | ||
| Skea Bridge | 75 | 66 | 19 | Pomeroy | Tyrone | |||
| Skeagey | 8 | 17 | 6 | Donegal | ||||
| Skeagh | 22 | 50 | 20 | Down | T | |||
| Skeagh | 35 | 41 | 18 | Fermanagh | ||||
| Skeagh | 52 | 52 | 18 | Tyrone | ||||
| Skeagh | 30 | 6 | 9 | Antrim | ||||
| Skeagh Water | 30 | 5 | 9 | Antrim | ||||
| Skeancrummin | 56 | 45 | 18 | Tyrone | ||||
| Skeboy | 58 | 74 | x | Termonmaguirk | Tyrone | T | ||
| Skegoneill | 33 | 77 | x | Shankill | Antrim | T | ||
| Skehoge | 3 | 37 | 5 | Antrim | ||||
| Skeiganeagh | 11 | 90 | 14 | Antrim | ||||
| Skelgagh | 40 | 60 | 18 | Donacavey | Tyrone | T | ||
| Skelgagh | 50 | 53 | 18 | Clogher | Tyrone | T | ||
| Skelly Hill | 46 | 82 | 15 | Down | ||||
| Skelly Hill | 57 | 80 | 15 | Down | ||||
| Skelpy | 28 | 91 | 12 | Urney | Donegal | T | ||
| Skenahergny | 74 | 74 | x | Desertcreat | Tyrone | T | ||
| Skenarget | 78 | 72 | x | Desertcreat | Tyrone | T | ||
| Skeoge | 38 | 22 | 7 | Burt | Donegal | T | ||
| Skeoge House | 39 | 41 | 18 | Fermanagh | ||||
| Skeoge River | 37 | 23 | 7 | Donegal | ||||
| Skeogue | 35 | 57 | 18 | Dromore | Tyrone | T | ||
| Sker Beg | x | Rathlin Island | Antrim | T | ||||
| Sker More | x | Rathlin Island | Antrim | T | ||||
| Skeraghan Point | 43 | 3 | 9 | Antrim | ||||
| Skerdan | 99 | 6 | 8 | Antrim | ||||
| Skerriagh | 11 | 53 | 5 | Antrim | ||||
| Skerries, Large | 87 | 42 | 4 | Antrim | ||||
| Skerries, Little | 85 | 42 | 4 | Antrim | ||||
| Skerries, The | 86 | 43 | 4 | Ballywillin | Antrim | T | ||
| Skerry | 14 | 22 | 6 | Kilmacrenan | Donegal | T | ||
| Skerry East | 14 | 19 | 9 | Newtown Crommelin | Antrim | T | ||
| Skerry Hill | 13 | 20 | 9 | Antrim | ||||
| Skerry Rock | 13 | 17 | 9 | Antrim | ||||
| Skerry View | 18 | 7 | 9 | Antrim | ||||
| Skerry Water | 14 | 15 | 9 | Antrim | ||||
| Skerry West | 13 | 18 | 9 | Newtown Crommelin | Antrim | T | ||
| Skerry, Little | 18 | 8 | 9 | Antrim | ||||
| Skerryglass | 29 | 92 | x | Urney | Tyrone | T | ||
| Skerrywhirry | 28 | 0 | 9 | Glenwhirry | Antrim | T | ||
| Skery Church | 19 | 8 | 9 | Antrim | ||||
| Skery Rock | 18 | 8 | 9 | Antrim | ||||
| Sketrick Island | 52 | 62 | 21 | Down | ||||
| Skey | 65 | 55 | 19 | Carnteel | Tyrone | T | ||
| Skeyhoogan | 64 | 13 | 7 | Derry | ||||
| Skilganaban | 30 | 92 | 15 | Ballynure | Antrim | T | ||
| Skillins Point | 56 | 67 | 15 | Down | ||||
| Skillins Point | 57 | 67 | 21 | Down | ||||
| Skillysolban | 19 | 49 | 20 | Down | T | |||
| Skinboy | 37 | 90 | x | Ardstraw | Tyrone | T | ||
| Skinboy Mountain | 38 | 93 | x | Ardstraw | Tyrone | T | ||
| Skinboy Wood | 37 | 92 | 12 | Ardstraw | Tyrone | |||
| Skinnahergna | 64 | 50 | 19 | Monagham | ||||
| Skirdan | 20 | 73 | 12 | Fermanagh | ||||
| Skitter | 45 | 74 | Old | Cappagh | Tyrone | T | ||
| Skitter Lough | 45 | 74 | 13 | Cappagh | Tyrone | |||
| Skreen | 40 | 66 | x | Donacavey | Tyrone | T | ||
| Skreen, Castle | 46 | 40 | 21 | Down | ||||
| Skullmartin | 64 | 68 | 15 | Down | ||||
| Skullmartin | 64 | 68 | 21 | Down | ||||
| Slackwater Burn | 94 | 20 | 4 | Antrim | ||||
| Slackwater Burn | 94 | 20 | 8 | Antrim | ||||
| Slaght | 10 | 99 | 14 | Connor | Antrim | T | ||
| Slaght | 10 | 99 | 9 | Connor | Antrim | T | ||
| Slaght | 14 | 35 | 5 | Antrim | ||||
| Slaght Bridge | 9 | 99 | 14 | Antrim | ||||
| Slaght Corner | 9 | 0 | 8 | Antrim | ||||
| Slaght Crossing | 9 | 0 | 8 | Antrim | ||||
| Slaght River | 82 | 12 | 8 | Derry | ||||
| Slaghtaggart | 2 | 12 | 8 | Antrim | ||||
| Slaghtaverty | 82 | 12 | 8 | Errigal | Derry | T | ||
| Slaghtfreeden | 73 | 86 | 13 | Lissan | Tyrone | T | ||
| Slaghtmanus | 55 | 13 | 7 | Cumber Lower | Derry | T | ||
| Slaghtneill | 82 | 5 | 8 | Killelagh | Derry | T | ||
| Slaghtybogy | 88 | 99 | 14 | Maghera | Derry | T | ||
| Slane | 24 | 11 | 9 | Skerry | Antrim | T | ||
| Slanes | 63 | 54 | 21 | Slanes | Down | T | ||
| Slanes Bay | 64 | 55 | 21 | Down | ||||
| Slanes Point | 64 | 55 | 21 | Down | ||||
| Slanesallagh | 24 | 11 | 9 | Antrim | ||||
| Slatady | 38 | 70 | x | Knockbreda | Down | T | ||
| Slatbeg | 51 | 47 | 18 | Clogher | Tyrone | T | ||
| Slatehill | 27 | 16 | 6 | All Saints | Donegal | T | ||
| Slatmanus Bridge | 57 | 13 | 7 | Derry | ||||
| Slatmore | 50 | 48 | 18 | Clogher | Tyrone | T | ||
| Slaty Port | 59 | 85 | 15 | Down | ||||
| Slaughterford Water | 46 | 93 | 15 | Antrim | ||||
| Slave Rock | 57 | 59 | 21 | Down | ||||
| Sleagh Bridge | 31 | 5 | 9 | Antrim | ||||
| Slee | 24 | 41 | 18 | Fermanagh | ||||
| Sleetch Rock | 58 | 57 | 21 | Down | ||||
| Sleivenanne | 16 | 21 | 9 | Antrim | ||||
| Slemish | 22 | 5 | 9 | Antrim | ||||
| Slemish View | 18 | 95 | 14 | Antrim | ||||
| Slemish View | 21 | 7 | 9 | Antrim | ||||
| Slieve Beagh | 52 | 43 | 18 | Tyrone | ||||
| Slieve Gallion | 80 | 80 | 13 | Tyrone | ||||
| Slieve Patrick | 52 | 46 | 21 | Down | ||||
| Slieveanorra | 13 | 26 | 5 | Orra More | Antrim | |||
| Slieveanorra Forest | 11 | 25 | 5 | Antrim | ||||
| Slieveanorra Forest | 14 | 23 | 9 | Antrim | ||||
| Slieveanorra Forest | 15 | 26 | 5 | Antrim | ||||
| Slieveard | 48 | 78 | 13 | Tyrone | ||||
| Slieveavaddy | 69 | 92 | 13 | Tyrone | ||||
| Slievebane | 21 | 13 | 9 | Sorns Hill | Antrim | |||
| Slievebane | 23 | 62 | 18 | Fermanagh | ||||
| Slievebane | 32 | 12 | 9 | Carncastle | Antrim | T | ||
| Slievebane | 56 | 75 | 13 | Tyrone | ||||
| Slievebane | 72 | 74 | 13 | Tyrone | ||||
| Slievebeg | 49 | 81 | 13 | Tyrone | ||||
| Slieveboy | 55 | 3 | 7 | Derry | ||||
| Slievebuck | 27 | 5 | 6 | Raphoe | Donegal | T | ||
| Slievebuck | 52 | 13 | 7 | Derry | ||||
| Slievecroob | 31 | 45 | 20 | Down | ||||
| Slievedivena | 57 | 62 | 18 | Tyrone | ||||
| Slievedoo | 7 | 80 | 12 | Termonamongan | Tyrone | T | ||
| Slievegarran | 31 | 42 | 20 | Down | ||||
| Slieveglass | 27 | 76 | 12 | Tyrone | ||||
| Slievegrane Hill | 51 | 45 | 21 | Down | ||||
| Slievehanny | 34 | 40 | 20 | Down | ||||
| Slievekirk | 45 | 8 | 7 | Tyrone | ||||
| Slievemore | 50 | 81 | 13 | Tyrone | ||||
| Slievemore | 57 | 65 | 18 | Tyrone | ||||
| Slievemore | 68 | 78 | 13 | Tyrone | ||||
| Slievemoyle | 36 | 71 | 12 | Tyrone | ||||
| Slievemoyle | 77 | 99 | 13 | Derry | ||||
| Slievemoyle | 79 | 86 | 13 | Derry | ||||
| Slievenaboley | 27 | 43 | 20 | Down | T | |||
| Slievenacloy | 24 | 71 | 14 | Derryaghy | Antrim | T | ||
| Slievenagh | 99 | 2 | 8 | Portglenone | Antrim | T | ||
| Slievenaghy | 96 | 16 | 8 | Finvoy | Antrim | T | ||
| Slievenagravery | 25 | 72 | 15 | Derryaghy | Antrim | T | ||
| Slievenagriddle | 52 | 45 | 21 | Ballee | Down | T | ||
| Slievenahanaghan | 10 | 22 | 9 | Antrim | ||||
| Slievenamaddy | 14 | 21 | 9 | Antrim | ||||
| Slievenamona | 25 | 7 | 9 | Antrim | ||||
| Slievenamoney | 33 | 44 | 20 | Down | ||||
| Slievenisky | 32 | 43 | 20 | Down | T | |||
| Slievenisky | 32 | 44 | 20 | Down | ||||
| Slievepin | 19 | 38 | 5 | Antrim | ||||
| Slieveroe | 33 | 56 | 18 | Tyrone | ||||
| Slieveroe | 56 | 70 | 13 | Tyrone | ||||
| Slieveroe | 57 | 48 | 21 | Down | ||||
| Slieverush | 12 | 18 | 9 | Antrim | ||||
| Slievetriplog | 56 | 48 | 21 | Down | ||||
| Slievlahan | 57 | 63 | 18 | Tyrone | ||||
| Slievmenagh | 62 | 82 | 13 | Tyrone | ||||
| Slievmoyle | 56 | 47 | 21 | Down | ||||
| Slieyemullagh | 0 | 95 | 6 | Donegal | ||||
| Slimag | 88 | 37 | 4 | Ballywillin | Derry | T | ||
| Slimero | 39 | 93 | 15 | Antrim | ||||
| Slipway | 33 | 26 | 7 | Donegal | ||||
| Slipway | 45 | 19 | 7 | Derry | ||||
| Slipway | 47 | 22 | 7 | Derry | ||||
| Slivemore | 59 | 61 | 18 | Tyrone | ||||
| Slivenaboley Mountain | 26 | 42 | 20 | Down | ||||
| Sloak Rock | 47 | 35 | 21 | Down | ||||
| Sloanstown | 58 | 71 | 15 | Donaghadee | Down | T | ||
| Sloanstown | 58 | 71 | 21 | Donaghadee | Down | T | ||
| Sloughan | 26 | 74 | 12 | Longfield West | Tyrone | T | Place of elms | |
| Sloughan Glen | 27 | 74 | 12 | Tyrone | ||||
| Slraughroy | 44 | 74 | 13 | Straughroy | Cappagh | Tyrone | T | |
| Slugawn Bridge | 96 | 92 | 14 | Derry | ||||
| Sluggada Burn | 60 | 0 | 7 | Derry | ||||
| Sluggada Burn | 60 | 99 | 13 | Derry | ||||
| Sluggan | 65 | 70 | 13 | Termonmaguirk | Tyrone | T | ||
| Sluggan Burn | 23 | 37 | 5 | Antrim | ||||
| Sluggan Moss | 9 | 92 | 14 | Antrim | ||||
| Sluggan North | 66 | 71 | 13 | Tyrone | ||||
| Slumps, The | 59 | 59 | 21 | Down | ||||
| Small Point, The | 35 | 70 | 12 | Tyrone | ||||
| Smallquarter | x | Kilraghts | Antrim | T | ||||
| Smelt Mill Bay | 48 | 82 | 15 | Down | ||||
| Smiddle Hill | 55 | 74 | 15 | Down | ||||
| Smiths Town | 47 | 27 | 7 | Donegal | ||||
| Smiths' Rock | 45 | 34 | 21 | Down | ||||
| Smithvale | 18 | 71 | 14 | Antrim | ||||
| Smithytown | 42 | 96 | 9 | Antrim | ||||
| Smotan Bridge | 60 | 45 | 19 | Monaghan | ||||
| Smulgedon | 75 | 14 | 8 | Balteagh | Derry | T | ||
| Smuttans | 7 | 71 | 12 | Donegal | ||||
| Snipe Lodge | 67 | 8 | 7 | Derry | ||||
| Snowhill | 32 | 41 | 18 | Fermanagh | ||||
| Soarn | 84 | 74 | 13 | Donaghenry | Tyrone | T | ||
| Soarn House | 85 | 74 | 14 | Donaghenry | Tyrone | |||
| Soarns River | 19 | 13 | 9 | Antrim | ||||
| Soccer School | 43 | 72 | 15 | Down | ||||
| Soccer School | 43 | 72 | 21 | Down | ||||
| Sockar | 11 | 14 | 6 | Kilmacrenan | Donegal | T | ||
| Solar | 34 | 12 | 9 | Carncastle | Antrim | T | ||
| Soldiers Bed | 64 | 55 | 21 | Down | ||||
| Soldiers Hill | 86 | 30 | 4 | Derry | ||||
| Soldierstown | 15 | 62 | 20 | Antrim | ||||
| Solitude | 12 | 78 | 14 | Antrim | ||||
| Solitude Bridge | 42 | 65 | 15 | Down | ||||
| Solitude Bridge | 42 | 65 | 21 | Down | ||||
| Solitude Lodge | 25 | 52 | 20 | Down | ||||
| Solitude Park | 12 | 45 | 20 | Down | ||||
| Sollus | 37 | 7 | 7 | Mountbank | Donaghedy | Tyrone | T | |
| Solomons Bridge | 50 | 51 | 18 | Tyrone | ||||
| Somerset | 84 | 30 | x | Mascosquin | Derry | T | ||
| Somerset Forest | 84 | 30 | 4 | Mascosquin | Derry | |||
| Somervillestown | 30 | 93 | x | Urney | Tyrone | T | ||
| Somme Heritage Centre | 50 | 76 | 15 | Down | ||||
| Soppog | 43 | 24 | 7 | Donegal | ||||
| Sorans Lough | 20 | 14 | 9 | Antrim | ||||
| Sorans River | 19 | 13 | 9 | Antrim | ||||
| Sorns Hill | 21 | 13 | 9 | Slievebane | Antrim | |||
| Sounding Hill Bridge | 88 | 91 | 14 | Derry | ||||
| Souterain | 18 | 86 | 14 | Antrim | ||||
| Souterain | 20 | 87 | 14 | Antrim | ||||
| Souterain | 23 | 88 | 14 | Antrim | ||||
| Souterrain | 8 | 38 | 5 | Antrim | ||||
| Souterrain | 9 | 35 | 5 | Antrim | ||||
| Souterrain | 13 | 99 | 14 | Antrim | ||||
| Souterrain | 15 | 10 | 6 | Donegal | ||||
| Souterrain | 21 | 82 | 12 | Tyrone | ||||
| Souterrain | 22 | 9 | 9 | Antrim | ||||
| Souterrain | 22 | 80 | 12 | Tyrone | ||||
| Souterrain | 24 | 17 | 6 | Donegal | ||||
| Souterrain | 27 | 44 | 20 | Down | ||||
| Souterrain | 40 | 20 | 7 | Derry | ||||
| Souterrain | 80 | 15 | 8 | Derry | ||||
| Souterrain | 80 | 30 | 4 | Derry | ||||
| Souterrain | 89 | 38 | 4 | Antrim | ||||
| Souterrain | 93 | 15 | 8 | Antrim | ||||
| Souterrain | 95 | 43 | 4 | Antrim | ||||
| Souterrain | 95 | 43 | 5 | Antrim | ||||
| Souterrain | 96 | 15 | 8 | Antrim | ||||
| Souterrain Rath | 87 | 15 | 8 | Derry | ||||
| South Bay | 63 | 48 | 21 | Down | ||||
| South Boretree Rock | 53 | 67 | 21 | Down | ||||
| South Buckey Rock | 57 | 60 | 21 | Down | ||||
| South Dougherty Rock | 57 | 63 | 21 | Down | ||||
| South Head | 46 | 2 | 9 | Antrim | ||||
| South Island | 56 | 66 | 15 | Down | ||||
| South Island | 56 | 66 | 21 | Down | ||||
| South Island Ean | 85 | 42 | 4 | Ballywillin | Antrim | T | ||
| South Rock | 52 | 68 | 15 | Down | ||||
| South Rock | 52 | 68 | 21 | Down | ||||
| South Rock | 56 | 60 | 21 | Down | ||||
| South Rock | 67 | 53 | 21 | Down | ||||
| South Sheelah's Island | 56 | 64 | 21 | Down | ||||
| Southtown | 34 | 10 | 9 | Antrim | ||||
| Spa, The | 35 | 49 | 20 | Down | ||||
| Spaltindoagh | 62 | 89 | 13 | Tyrone | ||||
| Spamount | 29 | 85 | 12 | Ardstraw | Tyrone | T | ||
| Spamount | 37 | 49 | 20 | Down | ||||
| Speenoge | 35 | 20 | 6 | Burt | Donegal | T | ||
| Speenoge | 35 | 20 | 7 | Burt | Donegal | T | ||
| Speerholme | 19 | 80 | 12 | Termonamongan | Tyrone | T | ||
| Speerstown | 19 | 96 | 14 | Antrim | ||||
| Spelhoagh | 70 | 97 | 13 | Tyrone | ||||
| Spencer's Bridge | 18 | 60 | 20 | Antrim | ||||
| Spennin Hill | 33 | 95 | 9 | Antrim | ||||
| Sperrin | 62 | 94 | 13 | Mount Hamilton | Tyrone | |||
| Sperrin Heritage Center | 60 | 93 | 13 | Tyrone | ||||
| Sperrin Lodge | 63 | 94 | 13 | Tyrone | ||||
| Spincha Burn | 73 | 4 | 8 | Derry | ||||
| Spittle Ballee | 52 | 41 | x | Ballee | Down | T | ||
| Spittle Hill | x | Coleraine | Derry | T | ||||
| Spittle Quarter | 52 | 40 | 21 | Ballee | Down | T | ||
| Split Bog, The | 25 | 40 | 20 | Down | ||||
| Spoil Heap | 18 | 2 | 9 | Antrim | ||||
| Sprindale Cottage | 92 | 81 | 14 | Derry | ||||
| Spring Bank | 27 | 70 | 15 | Antrim | ||||
| Spring Bank | 89 | 79 | 14 | Derry | ||||
| Spring Farm | 89 | 45 | 19 | Armagh | ||||
| Spring Farm | x | Antrim | Antrim | T | ||||
| Spring Field | 1 | 91 | 14 | Antrim | ||||
| Spring Grove | 81 | 94 | 13 | Derry | ||||
| Spring Hill | 11 | 53 | 20 | Down | ||||
| Spring Hill | 15 | 82 | 14 | Antrim | ||||
| Spring Hill | 21 | 54 | 20 | Down | ||||
| Spring Hill | 33 | 83 | 12 | Tyrone | ||||
| Spring Hill | 40 | 17 | 7 | Templemore | Derry | T | ||
| Spring Hill | 46 | 87 | 13 | Tyrone | ||||
| Spring Hill | 86 | 82 | 14 | Derry | ||||
| Spring Hill | 93 | 50 | 19 | Armagh | ||||
| Spring Lane | 94 | 56 | 19 | Armagh | ||||
| Spring Lane Cottage | 87 | 87 | 14 | Derry | ||||
| Spring Mount | 26 | 50 | 20 | Down | ||||
| Spring Mount | x | Grange of Dundermot | Antrim | T | ||||
| Spring Park | 78 | 44 | 19 | Armagh | ||||
| Spring Town | 42 | 18 | 7 | Templemore | Derry | T | ||
| Spring Vale | 85 | 84 | 14 | Derry | ||||
| Spring Vale | 91 | 87 | 14 | Derry | ||||
| Spring Well Bridge | 97 | 97 | 14 | Derry | ||||
| Springfield | 11 | 57 | 20 | Down | ||||
| Springfield | 18 | 76 | 14 | Antrim | ||||
| Springfield | 21 | 65 | 20 | Antrim | ||||
| Springfield | 28 | 86 | 12 | Tyrone | ||||
| Springfield | 45 | 21 | 7 | Derry | ||||
| Springfield | 50 | 49 | 18 | Tyrone | ||||
| Springfield | 79 | 44 | 19 | Armagh | ||||
| Springfield | 98 | 28 | 4 | Antrim | ||||
| Springfield | 98 | 28 | 5 | Antrim | ||||
| Springfield | 98 | 28 | 8 | Antrim | ||||
| Springfield House | 15 | 54 | 20 | Down | ||||
| Springhill | 29 | 98 | 6 | Clonleigh | Donegal | T | ||
| Springhill | 30 | 98 | 12 | Clonleigh | Donegal | T | ||
| Springhill | 31 | 56 | 18 | Tyrone | ||||
| Springhill | 63 | 10 | 7 | Derry | ||||
| Springhill Houses | 87 | 82 | 14 | Derry | ||||
| Springmount | 7 | 14 | 8 | Antrim | ||||
| Springs, The | 91 | 34 | 4 | Antrim | ||||
| Springs, The | 91 | 34 | 5 | Antrim | ||||
| Springtown | 56 | 51 | 18 | Clogher | Tyrone | T | ||
| Springvale | 16 | 46 | 20 | Down | ||||
| Springvale | 18 | 82 | 14 | Antrim | ||||
| Springvale | 19 | 65 | 20 | Antrim | ||||
| Springvale | 25 | 92 | 15 | Antrim | ||||
| Springvale | 31 | 57 | 20 | Down | ||||
| Springvale | 62 | 67 | x | Ballywalter | Down | T | ||
| Springvale | 62 | 67 | x | Ballywalter | Down | T | ||
| Springwell Crescent | 78 | 27 | 4 | Derry | ||||
| Springwell Crescent | 78 | 27 | 8 | Derry | ||||
| Springwell Forest | 77 | 26 | 4 | Derry | ||||
| Springwell Forest | 77 | 26 | 8 | Derry | ||||
| Sproule's Lough | 10 | 18 | 6 | Donegal | ||||
| Sproule's Town | 6 | 37 | 5 | Antrim | ||||
| Spur Royal Castle | 55 | 53 | 18 | Tyrone | ||||
| Squires Hill | 29 | 78 | 15 | Antrim | ||||
| Sraghcumber | 14 | 79 | 12 | Termonamongan | Tyrone | T | ||
| Sragnaelogh | 21 | 83 | 12 | Tyrone | ||||
| Srahenny Point | 21 | 50 | 18 | Fermanagh | ||||
| Srananny | 71 | 40 | 19 | Monaghan | ||||
| Sroanderrig | 10 | 50 | 5 | Antrim | ||||
| Sroannamaddy | 9 | 50 | 5 | Antrim | ||||
| Sronnahervy Bridge | 61 | 93 | 13 | Tyrone | ||||
| Sruffaunagallagh | 8 | 3 | 6 | Donegal | ||||
| Sruhan Cam | 18 | 21 | 9 | Antrim | ||||
| Sruhan Meenard | 65 | 1 | 7 | Derry | ||||
| Sruhanacolasta Burn | 73 | 4 | 8 | Derry | ||||
| Sruhanadumpan Burn | 71 | 4 | 8 | Derry | ||||
| Sruhanagruam | 17 | 16 | 9 | Antrim | ||||
| Sruhanaloughra Burn | 10 | 80 | 12 | Tyrone | ||||
| Sruhanalticarra Burn | 59 | 83 | 13 | Tyrone | ||||
| Sruhananess Bridge | 12 | 81 | 12 | Tyrone | ||||
| Sruhanboy River | 3 | 0 | 6 | Donegal | ||||
| Sruhanbrack | 13 | 81 | 12 | Tyrone | ||||
| Sruhancam | 6 | 13 | 6 | Donegal | ||||
| Sruhangarrow | 2 | 14 | 6 | Gartan | Donegal | T | ||
| Sruhangarrow | 99 | 13 | 6 | Donegal | ||||
| Sruhangarrow Mountain | 99 | 15 | 6 | Gartan | Donegal | T | ||
| Sruhangarve | 9 | 86 | 12 | Donegal | ||||
| Sruhangarve | 75 | 1 | 8 | Derry | ||||
| Sruhangarve Bridge | 10 | 87 | 12 | Donegal | ||||
| Sruhangarve Burn | 74 | 4 | 8 | Derry | ||||
| Sruhanlabcllagh | 5 | 80 | 12 | Tyrone | ||||
| Sruhanloughmuck | 96 | 7 | 6 | Donegal | ||||
| Sruhannacullia | 1 | 22 | 6 | Donegal | ||||
| Sruhanpollandoo | 97 | 7 | 6 | Donegal | ||||
| Sruhanroe | 3 | 11 | 6 | Donegal | ||||
| St. Angelo | 21 | 50 | 18 | Fermanagh | ||||
| St. Angelo Airport | 22 | 49 | 18 | Fermanagh | ||||
| St. Bridget's Well | 87 | 44 | 19 | Armagh | ||||
| St. Columb's Chapel | 44 | 17 | 7 | Derry | ||||
| St. Columb's Stone | 44 | 19 | 7 | Derry | ||||
| St. Columbkille's Stone | 5 | 17 | 6 | Donegal | ||||
| St. Columbkilles Stone | 85 | 14 | 8 | Derry | ||||
| St. Dabheoc's Monastery | 7 | 74 | 12 | Donegal | ||||
| St. Helena | 0 | 93 | 14 | Antrim | ||||
| St. Joseph's Place | 54 | 42 | 21 | Down | ||||
| St. Joseph's Square | 52 | 44 | 21 | Down | ||||
| St. Loury's Well | 74 | 22 | 4 | Derry | ||||
| St. Loury's Well | 74 | 22 | 8 | Derry | ||||
| St. Luke's Hospital | 88 | 46 | 19 | Armagh | ||||
| St. Muadain's Church | 66 | 49 | 19 | Armagh | ||||
| St. Patrick's Well | 0 | 51 | 20 | Armagh | ||||
| St. Patrick's Well and Chair | 59 | 49 | 18 | Tyrone | ||||
| St. Patrick's Well Grave Yard | 59 | 77 | 15 | Down | ||||
| St. Patricks Centre | 48 | 44 | 21 | Down | ||||
| St. Patricks Rocks | 61 | 42 | 21 | Down | ||||
| St. Patricks Way | 52 | 45 | 21 | Down | ||||
| St. Patricks Way | 54 | 46 | 21 | Down | ||||
| St. Tassach's Terace | 54 | 47 | 21 | Down | ||||
| Stable Hill | 12 | 94 | 14 | Antrim | ||||
| Stackaboy | x | Ballinatoy | Antrim | T | ||||
| Stackahorlin | x | Ballinatoy | Antrim | T | ||||
| Stackamore | 15 | 52 | 5 | Antrim | ||||
| Stackaniska | x | Rathlin Island | Antrim | T | ||||
| Stackarnagh | 10 | 13 | 6 | Conwal | Donegal | T | ||
| Stackarnagh Burn | 10 | 12 | 6 | Conwal | Donegal | |||
| Stacknacally | x | Rathlin Island | Antrim | T | ||||
| Stacknaderginan | x | Rathlin Island | Antrim | T | ||||
| Staffardstown Road Bridge | 7 | 89 | 14 | Antrim | ||||
| Staffordstown | 4 | 87 | 14 | Duneane | Antrim | T | ||
| Staghall | 5 | 14 | x | Gartan | Donegal | T | ||
| Staghall Mountain | 96 | 17 | 6 | Gartan | Donegal | T | ||
| Staghall Mountain East | 3 | 16 | x | Gartan | Donegal | T | ||
| Staghall Mountain West | 96 | 17 | x | Gartan | Donegal | T | ||
| Stakernagh | 73 | 61 | x | Donaghmore | Tyrone | T | ||
| Standalone | 24 | 7 | 9 | Antrim | ||||
| Standard Hill | 18 | 88 | 14 | Antrim | ||||
| Standfield House | 42 | 69 | 15 | Down | ||||
| Standfield House | 42 | 69 | 21 | Down | ||||
| Standing Stones Hill | 25 | 74 | 15 | Antrim | ||||
| Stanfford, Mount | 98 | 5 | 8 | Antrim | ||||
| Stangmore (Knox) | 84 | 53 | 19 | Clonfeacle | Tyrone | T | ||
| Stangmore (Magee) | 81 | 59 | x | Clonfeacle | Tyrone | T | ||
| Stangmore House | 81 | 59 | 19 | Tyrone | ||||
| Stangmore Lodge | 81 | 59 | 19 | Tyrone | ||||
| Stanierds Point | 96 | 78 | 14 | Tyrone | ||||
| Star Bog | 31 | 2 | 9 | Antrim | ||||
| Starritstown | 20 | 3 | 6 | Convoy | Donegal | T | ||
| Station Island | 8 | 73 | 12 | Templecarn | Donegal | T | ||
| Steedstown | 3 | 7 | 8 | Antrim | ||||
| Steels Bridge | 28 | 95 | 9 | Antrim | ||||
| Steen's Corner | 18 | 95 | 9 | Antrim | ||||
| Steen's Corner | 18 | 96 | 14 | Antrim | ||||
| Steeple | 15 | 88 | 14 | Antrim | Antrim | T | ||
| Stephenstown | 29 | 94 | x | Urney | Tyrone | T | ||
| Steps Bridge | 13 | 58 | 20 | Down | ||||
| Stevensons Dowery | 84 | 71 | 13 | Galvally | Donaghenry | Tyrone | T | |
| Stewart Bungalows | 42 | 69 | 18 | Tyrone | ||||
| Stewart, Fort | 27 | 20 | 6 | Donegal | ||||
| Stewart, Mount | 45 | 56 | 18 | Clogher | Tyrone | T | ||
| Stewartstown | 35 | 98 | 9 | Antrim | ||||
| Stewartstown | 36 | 96 | 12 | Tyrone | ||||
| Stewartstown | 85 | 70 | 14 | Donaghenry | Tyrone | T | ||
| Stewartstown Lough | 85 | 70 | 14 | Donaghenry | Tyrone | |||
| Stick Bridge, The | 8 | 33 | 5 | Antrim | ||||
| Stick Hill | 68 | 0 | 7 | Derry | ||||
| Stiles | x | Antrim | Antrim | T | ||||
| Still House Island | 2 | 22 | 6 | Donegal | ||||
| Stiloga | 79 | 56 | 19 | Clonfeacle | Tyrone | T | ||
| Stinker Rock | 45 | 35 | 21 | Down | ||||
| Stinking' Rock | 55 | 58 | 21 | Down | ||||
| Stinson's Bridge | 22 | 40 | 18 | Fermanagh | ||||
| Stirk Isle | 60 | 85 | 15 | Down | ||||
| Stone Bridge | 43 | 77 | 12 | Cappagh | Tyrone | |||
| Stone Field | 22 | 50 | 18 | Fermanagh | ||||
| Stone Font | 0 | 99 | 14 | Antrim | ||||
| Stone Hill | 74 | 89 | 13 | Derry | ||||
| Stone Island | 53 | 39 | 21 | Down | ||||
| Stone Park | 79 | 28 | 4 | Derry | ||||
| Stone Park | 79 | 28 | 8 | Derry | ||||
| Stone Row | 60 | 47 | 4 | Donegal | ||||
| Stonebridge | 94 | 50 | 19 | Armagh | ||||
| Stonewalls | 33 | 89 | 12 | Ardstraw | Tyrone | T | ||
| Stonewalls House | 32 | 88 | 12 | Tyrone | ||||
| Stoney Burn | 7 | 24 | 8 | Antrim | ||||
| Stoneyfalls | 44 | 2 | 7 | Tyrone | ||||
| Stoneyford | 21 | 70 | 14 | Antrim | ||||
| Stoneyford Bridge | 20 | 70 | 14 | Antrim | ||||
| Stoneyford Reservoir | 21 | 70 | 14 | Antrim | ||||
| Stoneyford River | 24 | 70 | 14 | Antrim | ||||
| Stonnahervy Burn | 60 | 94 | 13 | Tyrone | ||||
| Stony Port | 66 | 61 | 21 | Down | ||||
| Stony Quarter | 22 | 6 | 9 | Antrim | ||||
| Stonybatter | 20 | 94 | 12 | Donegal | ||||
| Stonybatter | 43 | 86 | 12 | Tyrone | ||||
| Stonybatter | 78 | 72 | 13 | Tyrone | ||||
| Stonyfalls | 32 | 89 | 12 | Ardstraw | Tyrone | T | ||
| Stonyfalls | 44 | 2 | x | Donaghedy | Tyrone | T | ||
| Stonyfaul | 33 | 88 | 15 | Antrim | ||||
| Stonyford Reservoir | 21 | 69 | 20 | Antrim | ||||
| Stonyford River | 20 | 71 | 14 | Antrim | ||||
| Stonypath | 38 | 2 | x | Leckpatrick | Tyrone | T | ||
| Store Quay | 11 | 71 | 14 | Antrim | ||||
| Storks, The | 89 | 42 | 4 | Antrim | ||||
| Stormont | 39 | 74 | 15 | Down | ||||
| Stormont Castle | 40 | 75 | 15 | Down | ||||
| Strabane | 34 | 97 | 6 | Camus | Tyrone | |||
| Strabane | 34 | 97 | 12 | Camus | Tyrone | |||
| Strabane | 39 | 58 | 18 | Donacavey | Tyrone | T | ||
| Strabane Bog | 35 | 99 | x | Leckpatrick | Tyrone | T | ||
| Strabane Bridge | 34 | 97 | 6 | Tyrone | ||||
| Strabane Bridge | 34 | 97 | 12 | Tyrone | ||||
| Strabane Canal | 35 | 1 | 6 | Tyrone | ||||
| Strabane Canal | 35 | 2 | 7 | Tyrone | ||||
| Strabane Canal | 35 | 99 | 12 | Tyrone | ||||
| Strabane Glen | 35 | 98 | 6 | Tyrone | ||||
| Stracam River | 98 | 32 | 4 | Antrim | ||||
| Stracam River | 98 | 32 | 5 | Antrim | ||||
| Stradowan | 52 | 80 | 13 | Bodoney Lower | Tyrone | T | ||
| Stradowan Bridge | 53 | 79 | 13 | Tyrone | ||||
| Stradowan Burn | 52 | 79 | 13 | Tyrone | ||||
| Stradreagh | 71 | 28 | 4 | Aghanloo | Derry | T | ||
| Stradreagh | 71 | 28 | 8 | Aghanloo | Derry | T | ||
| Stradreagh Beg | x | Clondermot | Derry | T | ||||
| Stradreagh More | 46 | 19 | 7 | Derry | ||||
| Straduff | 34 | 66 | 18 | Dromore | Tyrone | T | ||
| Stragally | 0 | 95 | 6 | Kilteevoge | Donegal | T | ||
| Stragrane | 77 | 49 | 19 | Aghanloo | Tyrone | T | ||
| Straguillin | 34 | 95 | 12 | Camus | Tyrone | T | ||
| Stragullin | 34 | 95 | 6 | Tyrone | ||||
| Strahack | 32 | 25 | 7 | Donegal | ||||
| Strahull | 62 | 92 | 13 | Bodoney Upper | Tyrone | T | ||
| Strahullagh Bridge | 40 | 99 | 12 | Tyrone | ||||
| Strahulter | 42 | 86 | 12 | Ardstraw | Tyrone | T | ||
| Straid | 1 | 40 | 5 | Antrim | ||||
| Straid | 7 | 98 | 14 | Ahoghill | Antrim | |||
| Straid | 7 | 99 | 14 | Ahoghill | Antrim | T | ||
| Straid | 23 | 31 | 5 | Antrim | ||||
| Straid | 33 | 91 | 15 | Ahoghill | Antrim | T | ||
| Straid | 59 | 4 | 7 | Learmount | Derry | T | ||
| Straid | 61 | 73 | 13 | Tyrone | ||||
| Straid Bridge | 7 | 0 | 8 | Ahoghill | Antrim | |||
| Straid Dam | 33 | 92 | 15 | Antrim | ||||
| Straid Hill | 33 | 91 | 15 | Antrim | ||||
| Straid Hill | 59 | 3 | 7 | Derry | ||||
| Straidarran | 58 | 5 | 7 | Derry | ||||
| Straidbilly | 98 | 37 | 4 | Billy | Antrim | T | ||
| Straidbilly | 98 | 37 | 5 | Billy | Antrim | T | ||
| Straidbilly Wood | 99 | 37 | 4 | Billy | Antrim | |||
| Straidbilly Wood | 99 | 37 | 5 | Billy | Antrim | |||
| Straidhavern | 18 | 79 | 14 | Killead | Antrim | T | ||
| Straidhill House | 33 | 91 | 15 | Antrim | ||||
| Straidkillen | 1 | 39 | 5 | Antrim | ||||
| Straidkilly | 29 | 16 | 9 | Antrim | ||||
| Straidkilly Point | 30 | 16 | 9 | Antrim | ||||
| Straidnahanna | 33 | 88 | 15 | Ballylinny | Antrim | T | ||
| Straletterdallan | 43 | 87 | 12 | Ardstraw | Tyrone | T | ||
| Stralongford | 16 | 5 | 6 | Convoy | Donegal | T | ||
| Stralongford | 28 | 60 | 18 | Kilskeery | Tyrone | T | ||
| Stramore | 1 | 13 | 6 | Gartan | Donegal | T | ||
| Stramore Farm | 5 | 49 | 20 | Down | ||||
| Stramore House | 5 | 48 | 20 | Down | ||||
| Stramore Upper | 98 | 14 | 6 | Gartan | Donegal | T | ||
| Stranabrattoge | 2 | 98 | 6 | Kilteevoge | Donegal | T | ||
| Stranabrosny | 41 | 4 | 7 | Donaghedy | Tyrone | T | ||
| Stranadarriff | 26 | 67 | 18 | Fermanagh | ||||
| Stranagalwilly | 54 | 98 | 13 | Learmount | Tyrone | T | ||
| Stranagalwilly Bridge | 54 | 0 | 7 | Derry | ||||
| Stranagard | x | Desertmartin | Derry | T | ||||
| Stranaglogh River | 99 | 15 | 6 | Donegal | ||||
| Stranagon | 84 | 8 | 8 | Derry | ||||
| Stranagowan Burn | 60 | 14 | 7 | Derry | ||||
| Stranagummer | 30 | 56 | x | Kilskeery | Tyrone | T | ||
| Stranagummer Bridge | 30 | 56 | 18 | Kilskeery | Tyrone | |||
| Stranamuck | 27 | 94 | 6 | Donaghmore | Donegal | T | ||
| Stranamuck | 27 | 94 | 12 | Donaghmore | Donegal | T | ||
| Strand | 52 | 38 | 21 | Bright | Down | T | ||
| Strand Lough | 53 | 37 | 21 | Down | ||||
| Strandford | 58 | 49 | 21 | Down | ||||
| Strandgrove | 14 | 74 | 14 | Antrim | ||||
| Strandtown | 37 | 74 | x | Holywood | Down | T | ||
| Strangford Lough | 56 | 59 | 21 | Down | ||||
| Strangford Lower | 58 | 49 | x | Ballyculter | Down | T | ||
| Strangford Upper | 57 | 48 | x | Ballyculter | Down | T | ||
| Strangford View | 44 | 75 | 15 | Down | ||||
| Stranhone | 28 | 67 | 18 | Fermanagh | ||||
| Stranisk | 39 | 99 | 12 | Leckpatrick | Tyrone | T | ||
| Stranisk | 42 | 56 | 18 | Donacavey | Tyrone | T | ||
| Stranmillis | 33 | 70 | 15 | Antrim | ||||
| Stranocum | 0 | 30 | 5 | Ballymoney | Antrim | T | ||
| Stranocum Bridge | 1 | 30 | 5 | Ballymoney | Antrim | |||
| Stranocum Hall | 1 | 30 | 5 | Ballymoney | Antrim | |||
| Stranorlaghan | 25 | 99 | 6 | Raphoe | Donegal | T | ||
| Stranorlar | 14 | 95 | 6 | Stranorlar | Donegal | T | ||
| Stranorlar | 14 | 95 | 12 | Stranorlar | Donegal | T | ||
| Straree | 50 | 86 | 13 | Tyrone | ||||
| Strathall | 49 | 11 | 7 | Cumber Lower | Derry | T | ||
| Strathnahincha Bridge | 57 | 40 | 18 | Monaghan | ||||
| Stratigore | 43 | 59 | x | Donacavey | Tyrone | T | ||
| Straughroy | 44 | 74 | 12 | Cappagh | Tyrone | T | ||
| Straughroy House | 43 | 74 | 12 | Cappagh | Tyrone | |||
| Strauinshin | 24 | 51 | 18 | Fermanagh | ||||
| Straw | 68 | 14 | 7 | Bovevagh | Derry | T | ||
| Straw | 77 | 93 | 13 | Ballynascreen | Derry | T | ||
| Straw House | 68 | 14 | 7 | Derry | ||||
| Straw Mountain | 78 | 90 | 13 | Ballynascreen | Derry | T | ||
| Strawmore | 76 | 95 | 13 | Ballynascreen | Derry | T | ||
| Strawpark | x | Kilbride | Antrim | T | ||||
| Streamville | 32 | 46 | 18 | Fermanagh | ||||
| Streefe Glebe | 54 | 74 | 13 | Termonmaguirk | Tyrone | T | ||
| Street, The | 89 | 92 | 14 | Derry | ||||
| Streeve (Hill) | 68 | 24 | 4 | Streive Hill | Drumachose | Derry | T | |
| Streeve (Hill) | 68 | 24 | 7 | Streive Hill | Drumachose | Derry | T | |
| Streeve Mountain | 68 | 3 | 7 | Drumachose | Derry | T | ||
| Strews | 76 | 74 | 13 | Kildress | Tyrone | T | ||
| Strife Rock | 55 | 57 | 21 | Down | ||||
| Strife Rock | 58 | 56 | 21 | Down | ||||
| Strifehill | 81 | 75 | x | Derryloran | Tyrone | T | ||
| Stroan | 10 | 35 | 5 | Armoy | Antrim | T | ||
| Stroan Bridge | 97 | 30 | 4 | Antrim | ||||
| Stroan Bridge | 98 | 30 | 5 | Antrim | ||||
| Stroan Lower | 10 | 35 | x | Derrykeighan | Antrim | T | ||
| Stroanbrack | 51 | 96 | 13 | Donaghedy | Tyrone | T | ||
| Stroanbrack Bridge | 50 | 97 | 13 | Tyrone | ||||
| Stroancarbadagh | 43 | 66 | 18 | Drumragh | Tyrone | T | ||
| Stroangarrow | 98 | 94 | x | Kilteevoge | Donegal | T | ||
| Stroangibbagh | 0 | 94 | 6 | Kilteevoge | Donegal | T | ||
| Stroangibbagh | 12 | 3 | 6 | Convoy | Donegal | T | ||
| Stroanlea | 11 | 50 | 5 | Antrim | ||||
| Strone Hill | 67 | 4 | 7 | Derry | ||||
| Stroove | 66 | 42 | 4 | Moville Lower | Donegal | T | ||
| Strouds Park | 22 | 69 | 20 | Antrim | ||||
| Struell | 51 | 44 | x | Down | Down | T | ||
| Struell House | 50 | 44 | 21 | Down | Down | |||
| Strule | 43 | 74 | Old | Cappagh | Tyrone | Stream | ||
| Strule River | 38 | 86 | 12 | Tyrone | ||||
| Strule River | 44 | 73 | 12 | Tyrone | ||||
| Strule River | 44 | 73 | 13 | Tyrone | ||||
| Strule River | 44 | 75 | 12 | Tyrone | ||||
| Strule River | 44 | 75 | 13 | Tyrone | ||||
| Stuart Hall | 89 | 72 | 14 | Arboe | Tyrone | T | ||
| Stubby Hill | 31 | 58 | 20 | Down | ||||
| Stubby Hill | 49 | 48 | 21 | Down | ||||
| Stuckan | 56 | 47 | 18 | Tyrone | ||||
| Stughan | 80 | 69 | 19 | Tullyniskan | Tyrone | T | ||
| Stump Hill | 45 | 54 | 21 | Down | ||||
| Sturgeon Bridge | 67 | 69 | 19 | Tyrone | ||||
| Sturgeons Hill | 96 | 49 | 19 | Armagh | ||||
| Sturrakeen | 48 | 92 | 13 | Tyrone | ||||
| Sturricknagower | 0 | 18 | 6 | Donegal | ||||
| Sturrin | 10 | 78 | 12 | Tyrone | ||||
| Sturrin | 14 | 82 | 12 | Tyrone | ||||
| Sufficial Quarter | 45 | 47 | 21 | Down | ||||
| Suffolk | 28 | 70 | 15 | Antrim | ||||
| Sugarloaf Hill | 33 | 12 | 9 | Antrim | ||||
| Sullenboy | 79 | 78 | x | Derryloran | Tyrone | T | ||
| Sultan | 65 | 77 | 13 | Termonmaguirk | Tyrone | T | ||
| Sultanbane | 63 | 76 | 13 | Tyrone | ||||
| Summer Hill | 5 | 32 | 5 | Antrim | ||||
| Summer Hill | 18 | 84 | 14 | Antrim | ||||
| Summer Hill | 24 | 53 | 20 | Down | ||||
| Summer Hill | 26 | 51 | 18 | Fermanagh | ||||
| Summer Hill | 43 | 40 | 21 | Down | ||||
| Summer Hill | 55 | 52 | 18 | Tyrone | ||||
| Summer Hill House | 83 | 44 | 19 | Armagh | ||||
| Summer Island | 87 | 54 | 19 | Armagh | ||||
| Summerdale | 21 | 86 | 14 | Antrim | ||||
| Summerhill | 8 | 54 | 20 | Down | ||||
| Summerhill House | 43 | 40 | 21 | Down | ||||
| Sunningdale House | 52 | 73 | 13 | Tyrone | ||||
| Sunny Bank | 22 | 53 | 18 | Fermanagh | ||||
| Sunny Hill | 60 | 57 | 19 | Tyrone | ||||
| Surhan Burn | 66 | 99 | 13 | Derry | ||||
| Surhanleanantawey | 78 | 88 | 13 | Derry | ||||
| Swallow Cave | 48 | 93 | 15 | Antrim | ||||
| Swan Island | 42 | 99 | 9 | Antrim | ||||
| Swan Island | 45 | 44 | 21 | Down | ||||
| Swan Island | 59 | 49 | 21 | Down | ||||
| Swan Island Little | 42 | 99 | 9 | Antrim | ||||
| Swanstown | 0 | 1 | 8 | Antrim | ||||
| Swatragh | 85 | 7 | 8 | Killilagh | Derry | T | ||
| Sweat House | 73 | 26 | 4 | Derry | ||||
| Sweat House | 73 | 26 | 8 | Derry | ||||
| Sweat House | 76 | 55 | 19 | Tyrone | ||||
| Sweat House | 82 | 2 | 8 | Derry | ||||
| Swilly | 33 | 4 | 6 | Taughboyne | Donegal | T | ||
| Swilly | 33 | 4 | 7 | Taughboyne | Donegal | T | ||
| Swilly Bridge | 32 | 3 | 7 | Donegal | ||||
| Swilly Burn | 27 | 1 | 6 | Donegal | ||||
| Swilly Burn | 33 | 4 | 6 | Donegal | ||||
| Swilly Burn | 33 | 4 | 7 | Donegal | ||||
| Swilly, Lough | 29 | 21 | 6 | Donegal | ||||
| Swilly, Lough | 30 | 22 | 7 | Donegal | ||||
| Swilly, Lough | 31 | 28 | 7 | Donegal | ||||
| Swilly, River | 2 | 8 | 6 | Donegal | ||||
| Swilly, River | 8 | 10 | 6 | Donegal | ||||
| Swilly, River | 19 | 11 | 6 | Donegal | ||||
| Swine Craes, The | 22 | 6 | 9 | Antrim | ||||
| Swineley Bay | 47 | 82 | 15 | Down | ||||
| Swineley Point | 48 | 82 | 15 | Down | ||||
| Sycamore Bridge | 29 | 65 | 15 | Down | ||||
| Sycamore Bridge | 29 | 65 | 20 | Down | ||||
| Sycamore Farm | 41 | 78 | 15 | Down | ||||
| Sycamore Hill | 22 | 74 | 14 | Antrim | ||||
| Sycamore Lodge | 52 | 37 | 21 | Down | ||||
| Syderham | 37 | 74 | 15 | Down | ||||
| Syerla | 81 | 57 | 19 | Clonfeacle | Tyrone | T | ||
| Sylvan Hill | 18 | 55 | 20 | Down | ||||
| Syonee | 42 | 59 | 18 | Donacavey | Tyrone | T | ||
| Syonfin | 44 | 59 | 18 | Donacavey | Tyrone | T | ||
| Syunshin | 47 | 52 | 18 | Clogher | Tyrone | T |