UpAlphabetical listing of Places in Monaghan
| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
| Achadh Mhic Giolla Eoin | city | Monaghan | Ireland | 54.39 | -7.05 | 830 | 2723 |
| Aghabog | city | Monaghan | Ireland | 54.15 | -7.09 | 374 | 1522 |
| Aghamackalinn | city | Monaghan | Ireland | 54.39 | -7.05 | 830 | 2723 |
| Aghlattacru | city | Monaghan | Ireland | 53.94 | -6.72 | 229 | 6363 |
| Aghlaverty | city | Monaghan | Ireland | 54.25 | -6.90 | 255 | 3753 |
| Aghnafarcan | city | Monaghan | Ireland | 54.06 | -6.75 | 830 | 3454 |
| Aghnagap | city | Monaghan | Ireland | 54.22 | -6.89 | 413 | 2725 |
| Aghnamullen | city | Monaghan | Ireland | 54.09 | -6.96 | 830 | 1705 |
| Alkill | city | Monaghan | Ireland | 54.25 | -6.86 | 236 | 2436 |
| Allagesh | city | Monaghan | Ireland | 54.26 | -7.11 | 255 | 2175 |
| An Mhaigh | city | Monaghan | Ireland | 54.40 | -6.98 | 147 | 3294 |
| An Seanchuach | city | Monaghan | Ireland | 54.36 | -6.97 | 95 | 2856 |
| Annaghroe Bridge | city | Monaghan | Ireland | 54.34 | -6.88 | 216 | 3487 |
| Annagleve | city | Monaghan | Ireland | 54.09 | -6.76 | 830 | 4875 |
| Annalittin | city | Monaghan | Ireland | 54.09 | -6.70 | 830 | 4954 |
| Annaseeragh | city | Monaghan | Ireland | 54.23 | -6.82 | 406 | 2263 |
| Annavalla | city | Monaghan | Ireland | 54.16 | -6.79 | 830 | 2424 |
| Ardaghy | city | Monaghan | Ireland | 54.21 | -6.91 | 830 | 3296 |
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