| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Slade | city | Loch Garman | Ireland | 52.1325 | -6.9044444 | 0 | 944 |
| Slade | city | Baile Atha Cliath | Ireland | 53.2666667 | -6.4466667 | 846 | 89397 |
| Slaghty | city | Gaillimh | Ireland | 52.9941667 | -8.36 | 180 | 1795 |
| Slaheny | city | Ciarrai | Ireland | 51.885 | -9.4538889 | 498 | 2441 |
| Slaheny Bridge | city | Ciarrai | Ireland | 51.8930556 | -9.4411111 | 324 | 2441 |
| Slane | city | An Mhi | Ireland | 53.71 | -6.5433333 | 91 | 4419 |
| Slatt Bridge | city | Laois | Ireland | 52.8736111 | -7.1627778 | 495 | 3058 |
| Sleatygraigue | city | Laois | Ireland | 52.8447222 | -6.9716667 | 141 | 3246 |
| Sleveen | city | Corcaigh | Ireland | 51.6469444 | -8.9638889 | 249 | 5243 |
| Slievanagark | city | Maigh Eo | Ireland | 54.1061111 | -9.2102778 | 68 | 1796 |
| Slieve | city | County Louth | Ireland | 54.0319444 | -6.4902778 | 137 | 9652 |
| Slieveanulty | city | Gaillimh | Ireland | 53.4141667 | -8.4430556 | 246 | 2870 |
| Slievebane | city | County Donegal | Ireland | 55.3691667 | -7.3375 | 68 | 871 |
| Slievemore | city | Maigh Eo | Ireland | 53.9961111 | -10.0705556 | 488 | 1068 |
| Slievemore | city | Corcaigh | Ireland | 51.4622222 | -9.4336111 | 0 | 795 |
| Slievenakilla | city | | Ireland | 54.15 | -7.9333333 | 1033 | 1725 |
| Slieveroe | city | Cill Chainnigh | Ireland | 52.2805556 | -7.0866667 | 203 | 3915 |
| Slieveroe | city | County Monaghan | Ireland | 54.1752778 | -6.9952778 | 498 | 3483 |
| Sligeach | city | Sligeach | Ireland | 54.2666667 | -8.4833333 | 42 | 2415 |
| Sligga Bridge | city | Corcaigh | Ireland | 51.8011111 | -8.4936111 | 246 | 5223 |
| Sligo | city | Sligeach | Ireland | 54.2666667 | -8.4833333 | 42 | 2415 |
| Sluggary Cross Roads | city | Corcaigh | Ireland | 51.9733333 | -8.5552778 | 436 | 5205 |
| Sluggera Cross Roads | city | Port Lairge | Ireland | 51.9552778 | -7.7472222 | 19 | 1633 |
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