Note: Some NHAs are also designated as Special Areas of Conservation (SACs) or as Special Protection Areas (SPAs).
| Site Code | Site Name |
| 459 | Altaconey Bog |
| 1470 | Ardgommon Wood |
| 1970 | Ballybeg Island |
| 1473 | Bangor Erris Bog |
| 467 | Benaderreen Cliffs |
| 469 | Bills rocks |
| 1278 | Burren Rock |
| 1969 | Caher Island |
| 1492 | Carrowmore Lough Shore |
| 477 | Clare Island |
| 1483 | Cloghmoyle Dunes |
| 1485 | Cloonagh Lough |
| 1486 | Cloonboorhy Lough |
| 481 | Coolbarreen Lough |
| 1488 | Cooraun Point Machair/Dooreel Creek |
| 482 | Creevagh Head |
| 483 | Croagh Patrick |
| 2383 | Croaghmoyle Mountain |
| 2420 | Cunnagher More Bog |
| 1491 | Dambaduff Lough |
| 2381 | Doogort East Bog |
| 494 | Downpatrick Head |
| 1499 | Drumleen Lough |
| 1500 | Eagle Island |
| 2446 | Ederglen Bog |
| 2432 | Forrew Bog |
| 1504 | Frehill Island |
| 2419 | Glenturk More Bog |
| 502 | Gowlaun Bog |
| 2391 | Inagh Bog |
| 1971 | Inishdalla |
| 1511 | Inishdegil Islands |
| 1967 | Inishgalloon |
| 506 | Inishglora and Inishkeeragh |
| 509 | Inishturk |
| 510 | Kilgarriff Bog |
| 1517 | Killala Esker |
| 511 | Killaturly Turlough |
| 1518 | Kinlooey Lough |
| 512 | Kinrovar Machair |
| 1520 | Knappagh Woods |
| 1527 | Lough Alick |
| 1528 | Lough Beg, Carrowmore |
| 519 | Lough Conn and Lough Cullin |
| 523 | Lough Gower |
| 2455 | Lough Greney Bog |
| 1533 | Lough Manan |
| 1910 | Mannin and Island Lakes |
| 735 | Maumtrasna Mountain Complex |
| 1472 | Mountpleasant School Turlough |
| 2078 | Moy Valley |
| 1968 | Mweelaun Island |
| 1548 | Pollatomish Bog |
| 215 | Rathbaun Turlough |
| 385 | Rostaff Turlough |
| 1559 | Slishmeen Turlough |
| 2403 | Sraheens Bog |
| 546 | Stags of Broadhaven |
| 548 | Tawnymackan Bog |
| 550 | Towerhill Lake |
| 1566 | Tristia Bog |
| 1567 | Tullaghan Bay |
| 1570 | Tullaghan Bay and Bog |
| 1570 | Ummeramtarry Bog |