| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Darraghlan | city | County Monaghan | Ireland | 54.1838889 | -6.9602778 | 495 | 3483 |
| Dernagola | city | County Monaghan | Ireland | 54.3863889 | -7.0363889 | 1581 | 4157 |
| Derrygola | city | County Monaghan | Ireland | 54.3391667 | -7.091667 | 636 | 4189 |
| Derrygorry | city | County Monaghan | Ireland | 54.4088889 | -7.05 | 436 | 4375 |
| Derrylea | city | County Monaghan | Ireland | 54.2758333 | -7.1316667 | 590 | 3275 |
| Derrylea | city | County Monaghan | Ireland | 54.3738889 | -7.0236111 | 1584 | 3562 |
| Doohamlat | city | County Monaghan | Ireland | 54.1263889 | -6.8219444 | 475 | 3529 |
| Doohamlet | city | County Monaghan | Ireland | 54.1263889 | -6.8219444 | 475 | 3529 |
| Doohat | city | County Monaghan | Ireland | 54.1241667 | -7.1319444 | 249 | 3111 |
| Dorothys Cross Roads | city | County Monaghan | Ireland | 54.1433333 | -7.2127778 | 423 | 3273 |
| Dromore | city | County Monaghan | Ireland | 54.1566667 | -6.9597222 | 459 | 3474 |
| Dromore | city | County Monaghan | Ireland | 54.1144444 | -6.675 | 459 | 4316 |
| Drum | city | County Monaghan | Ireland | 54.1027778 | -7.1411111 | 252 | 3111 |
| Drumacreeve | city | County Monaghan | Ireland | 54.1272222 | -7.1469444 | 252 | 3444 |
| Drumacreeve | city | County Monaghan | Ireland | 54.1372222 | -7.0266667 | 393 | 3444 |
| Drumacrib | city | County Monaghan | Ireland | 54.1469444 | -6.6633333 | 498 | 6008 |
| Drumakill | city | County Monaghan | Ireland | 54.12 | -6.6722222 | 459 | 4316 |
| Drumaveale | city | County Monaghan | Ireland | 54.1141667 | -7.2877778 | 259 | 2872 |
| Drumcattan | city | County Monaghan | Ireland | 54.0108333 | -6.6330556 | 249 | 4725 |
| Drumcoo | city | County Monaghan | Ireland | 54.3083333 | -7.1136111 | 1049 | 3639 |
| Drumgolat | city | County Monaghan | Ireland | 54.2447222 | -6.8430556 | 249 | 4203 |
| Drumgoole | city | County Monaghan | Ireland | 54.2772222 | -6.9086111 | 213 | 3862 |
| Drummanreagh | city | County Monaghan | Ireland | 54.0475 | -6.73 | 498 | 3496 |
| Drumnagrella | city | County Monaghan | Ireland | 53.99 | -6.6052778 | 229 | 6614 |
| Drumneill | city | County Monaghan | Ireland | 54.2511111 | -6.8363889 | 321 | 4861 |
| Drumreask | city | County Monaghan | Ireland | 54.2591667 | -7.083333 | 305 | 3476 |
| Drumscor | city | County Monaghan | Ireland | 54.3055556 | -7.0797222 | 413 | 3508 |
| Drumsloe | city | County Monaghan | Ireland | 54.1391667 | -7.3144444 | 383 | 2863 |
| Drumsmat Bridge | city | County Monaghan | Ireland | 54.2227778 | -7.0527778 | 295 | 3480 |
| Dundian Cross Roads | city | County Monaghan | Ireland | 54.3555556 | -7.055556 | 482 | 3768 |
| Dundrannan Cross Roads | city | County Monaghan | Ireland | 54.1452778 | -6.9919444 | 416 | 3474 |
| Dunmaurice | city | County Monaghan | Ireland | 54.1352778 | -6.8694444 | 446 | 3487 |
| Dunraymond | city | County Monaghan | Ireland | 54.1738889 | -6.9127778 | 495 | 3483 |
|
|