Liste des communes de l'EPCI
| Commune | Code postal | Département | Locaux | Couverture |
|---|---|---|---|---|
| Brandérion | 56700 | Morbihan (56) | 758 | 95,0% |
| Bubry | 56310 | Morbihan (56) | 2 036 | 95,0% |
| Calan | 56240 | Morbihan (56) | 685 | 7,0% |
| Caudan | 56850 | Morbihan (56) | 4 492 | 97,0% |
| Cléguer | 56620 | Morbihan (56) | 1 858 | 99,0% |
| Gâvres | 56680 | Morbihan (56) | 996 | 94,0% |
| Gestel | 56530 | Morbihan (56) | 1 347 | 97,0% |
| Groix | 56590 | Morbihan (56) | 3 114 | 96,0% |
| Guidel | 56520 | Morbihan (56) | 8 237 | 94,0% |
| Hennebont | 56700 | Morbihan (56) | 10 555 | 96,0% |
| Inguiniel | 56240 | Morbihan (56) | 1 502 | 5,0% |
| Inzinzac-Lochrist | 56650 | Morbihan (56) | 3 705 | 95,0% |
| Lanester | 56600 | Morbihan (56) | 13 673 | 98,0% |
| Languidic | 56440 | Morbihan (56) | 4 440 | 98,0% |
| Lanvaudan | 56240 | Morbihan (56) | 445 | 5,0% |
| Larmor-Plage | 56260 | Morbihan (56) | 6 588 | 97,0% |
| Locmiquélic | 56570 | Morbihan (56) | 2 704 | 95,0% |
| Lorient | 56100 | Morbihan (56) | 45 555 | 95,0% |
| Ploemeur | 56270 | Morbihan (56) | 12 191 | 95,0% |
| Plouay | 56240 | Morbihan (56) | 3 678 | 91,0% |
| Pont-Scorff | 56620 | Morbihan (56) | 2 499 | 93,0% |
| Port-Louis | 56290 | Morbihan (56) | 2 353 | 89,0% |
| Quéven | 56530 | Morbihan (56) | 5 132 | 98,0% |
| Quistinic | 56310 | Morbihan (56) | 1 367 | 91,0% |
| Riantec | 56670 | Morbihan (56) | 3 998 | 93,0% |