| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Daggan | city | Cavan | Ireland | 54.03 | -7.37 | 255 | 8106 |
| Danesfort | city | Cavan | Ireland | 53.99 | -7.43 | 249 | 2838 |
| Dernakesh | city | Cavan | Ireland | 54.02 | -7.04 | 390 | 1728 |
| Derry | city | Cavan | Ireland | 53.99 | -7.55 | 249 | 1787 |
| Derrydamph | city | Cavan | Ireland | 53.98 | -7.16 | 830 | 1600 |
| Derrygoss | city | Cavan | Ireland | 54.05 | -7.41 | 232 | 2736 |
| Derrylane | city | Cavan | Ireland | 53.97 | -7.54 | 311 | 1835 |
| Derryna | city | Cavan | Ireland | 54.02 | -7.44 | 285 | 1486 |
| Derrynacreve | city | Cavan | Ireland | 54.16 | -7.72 | 249 | 1006 |
| Derrynananta | city | Cavan | Ireland | 54.16 | -7.87 | 935 | 286 |
| Derryvony | city | Cavan | Ireland | 54.15 | -7.42 | 360 | 2429 |
| Doire Mhóna | city | Cavan | Ireland | 54.15 | -7.42 | 360 | 2429 |
| Doogary | city | Cavan | Ireland | 54.04 | -7.63 | 249 | 1084 |
| Dowra | city | Cavan | Ireland | 54.19 | -8.02 | 223 | 517 |
| Droichead an Bhuitlearaigh | city | Cavan | Ireland | 54.04 | -7.38 | 249 | 4945 |
| Drumaloor | city | Cavan | Ireland | 54.07 | -7.41 | 311 | 2609 |
| Drumalure | city | Cavan | Ireland | 54.07 | -7.41 | 311 | 2609 |
| Drumane | city | Cavan | Ireland | 54.11 | -7.62 | 249 | 1736 |
| Drumasladdy | city | Cavan | Ireland | 54.09 | -7.50 | 255 | 2412 |
| Drumbar | city | Cavan | Ireland | 54.18 | -7.67 | 830 | 1653 |
| Drumbrollisk | city | Cavan | Ireland | 54.07 | -7.19 | 249 | 1234 |
| Drumcarban | city | Cavan | Ireland | 53.93 | -7.43 | 249 | 2362 |
| Drumcask | city | Cavan | Ireland | 54.17 | -7.73 | 275 | 1111 |
| Drumcondra | city | Cavan | Ireland | 54.02 | -7.01 | 410 | 1434 |
| Drumconnick | city | Cavan | Ireland | 53.99 | -7.39 | 282 | 8091 |
| Drumcor | city | Cavan | Ireland | 54.10 | -7.29 | 246 | 1822 |
| Drumcrow South | city | Cavan | Ireland | 53.96 | -7.58 | 269 | 1588 |
| Drumgoon | city | Cavan | Ireland | 54.04 | -7.06 | 360 | 2882 |
| Drumgor | city | Cavan | Ireland | 53.98 | -7.44 | 308 | 2285 |
| Drumhillagh | city | Cavan | Ireland | 53.98 | -6.97 | 830 | 2331 |
| Drumhillagh | city | Cavan | Ireland | 54.03 | -7.23 | 262 | 1719 |
| Drumlane | city | Cavan | Ireland | 54.02 | -7.23 | 305 | 1737 |
| Drumliff | city | Cavan | Ireland | 54.06 | -7.33 | 236 | 2753 |
| Drummany | city | Cavan | Ireland | 54.03 | -7.59 | 249 | 1286 |
| Drummullagh | city | Cavan | Ireland | 54.05 | -7.51 | 298 | 1714 |
| Drumnatread | city | Cavan | Ireland | 54.01 | -7.13 | 830 | 1399 |
| Drumroe | city | Cavan | Ireland | 53.95 | -7.52 | 383 | 1811 |
| Drung | city | Cavan | Ireland | 54.03 | -7.24 | 272 | 1736 |
| Drutamon | city | Cavan | Ireland | 53.99 | -7.08 | 830 | 1454 |
| Dun An Ri | city | Cavan | Ireland | 53.91 | -6.81 | 298 | 3730 |
| Duneena | city | Cavan | Ireland | 53.94 | -7.01 | 830 | 2451 |
| Dunglave | city | Cavan | Ireland | 54.16 | -7.71 | 259 | 1112 |