| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Scairbh na gCaorach | city | County Monaghan | Ireland | 54.3405556 | -6.9591667 | 144 | 3650 |
| Scotch Corner | city | County Monaghan | Ireland | 54.1788889 | -6.8672222 | 511 | 3608 |
| Scotshouse | city | County Monaghan | Ireland | 54.1219444 | -7.2475 | 255 | 3008 |
| Scotstown | city | County Monaghan | Ireland | 54.2775 | -7.065 | 249 | 3476 |
| Selloo | city | County Monaghan | Ireland | 54.2533333 | -7.1252778 | 249 | 3275 |
| Shanco | city | County Monaghan | Ireland | 54.3591667 | -6.9669444 | 95 | 3650 |
| Shanco | city | County Monaghan | Ireland | 53.9961111 | -6.8369444 | 508 | 3051 |
| Shanmullagh | city | County Monaghan | Ireland | 54.1855556 | -6.9036111 | 498 | 3483 |
| Shantonagh | city | County Monaghan | Ireland | 54.0502778 | -6.8505556 | 462 | 3478 |
| Sheetrim | city | County Monaghan | Ireland | 54.0961111 | -6.7861111 | 498 | 3490 |
| Sheskin | city | County Monaghan | Ireland | 54.2916667 | -7.1166667 | 1003 | 3639 |
| Slieveroe | city | County Monaghan | Ireland | 54.1752778 | -6.9952778 | 498 | 3483 |
| Smithborough | city | County Monaghan | Ireland | 54.2233333 | -7.0908333 | 242 | 3439 |
| Stone Bridge | city | County Monaghan | Ireland | 54.2 | -7.1666667 | 239 | 3334 |
| Swans Cross Roads | city | County Monaghan | Ireland | 54.1463889 | -7.097222 | 331 | 3434 |
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