| Place | Post Code |
|---|---|
| Drumlark, Cavan | H12 |
| Drummonum, Cavan | H12 |
| Drummullig, Cavan | H12 |
| Drumoghra, Cavan | H12 |
| Eadarmaighean (Edermine, Cavan) | H12 |
| Farnham Estate, Cavan | H12 |
| Gartnasillagh, Cavan | H12 |
| Coill an Gharraí (Killygarry, Cavan) | H12 |
| Coill an Eabair (Killynebber, Cavan) | H12 |
| Kilnavara, Cavan | H12 |
| Kinnypottle, Cavan | H12 |
| An Leacht (Latt, Cavan) | H12 |
| Lios Dorráin (Lisdarn, Cavan) | H12 |
| Pottle, Cavan | H12 |
| Pullamore, Cavan | H12 |
| Pullamore Far, Cavan | H12 |
| Pullamore Near, Cavan | H12 |
| Rahulton, Cavan | H12 |
| Rossculligan, Cavan | H12 |
| Shankcloon, Cavan | H12 |
| Stragelliff, Cavan | H12 |
| Sualainn Íochtarach (Swellan Lower, Cavan) | H12 |
| Swellan Upper, Cavan | H12 |
| The Fair Green, Cavan | H12 |
| An Eachrais (The Gallops, Cavan) | H12 |
| An Paideac (The Paddock, Cavan) | H12 |