| Parish | Posttown | County |
| Achill | Westport | Mayo |
| Ardagh | Ballina | Mayo |
| Attymoss | Ballina | Mayo |
| Backs | Rathduff | Mayo |
| Backs | Rathduff | Mayo |
| Bailindang. | Westport | Mayo |
| Balla | Ballylass | Mayo |
| Ballinrobe | Ballinrobe | Mayo |
| Ballintubbr | Ballyglass | Mayo |
| Ballisakery | - | Mayo |
| Ballycastle | Rathlackan | Mayo |
| Ballycroy | Bewp.-May. | Mayo |
| Belmullet | - | Mayo |
| Bohela | Swineford | Mayo |
| Burmiconl. | Ballina | Mayo |
| Castlebar | Castlebar | Mayo |
| Castlebar | Castlebar | Mayo |
| Clare | Clare | Mayo |
| Clareisland | Westport | Mayo |
| Clifden | Ballinrobe | Mayo |
| Clifden | Ballinrobe | Mayo |
| Cong | Ballinrobe | Mayo |
| Crossmoli. | Co. Mayo | Mayo |
| Easky | Ballina | Mayo |
| Erris | Mayo | Mayo |
| Glanhest | Killala | Mayo |
| Islandeddie | Castlebar | Mayo |
| Kilfian | - | Mayo |
| Killabehag. | Swineford | Mayo |
| Killala | Killala | Mayo |
| Killedan | Swineford | Mayo |
| Killininduff | Swineford | Mayo |
| Killosser | Foxford | Mayo |
| Kilmore | Ballina | Mayo |
| Kilmore | Newport-Mayo | Mayo |
| Knock | Clare | Mayo |
| Lackan | Rathlackan | Mayo |
| Laherdane | Swineford | Mayo |
| Louisburgh | Westport | Mayo |
| Louisburgh | Westport | Mayo |
| Mayo | Ballyglass | Mayo |
| Moy | Ballina | Mayo |
| Moygaunn. | - | Mayo |
| Neale | Ballinrobe | Mayo |
| Newport | Newport | Mayo |
| Newport | Newport | Mayo |
| Ovannore | Bangor | Mayo |
| Pheara | Ballinrobe | Mayo |
| Srewel | Srewel | Mayo |
| Straid | Foxford | Mayo |