Liste des communes de l'EPCI
| Commune | Code postal | Département | Locaux | Couverture |
|---|---|---|---|---|
| Brandérion | 56700 | Morbihan (56) | 757 | 95,0% |
| Bubry | 56310 | Morbihan (56) | 2 010 | 92,0% |
| Calan | 56240 | Morbihan (56) | 685 | 7,0% |
| Caudan | 56850 | Morbihan (56) | 4 493 | 94,0% |
| Cléguer | 56620 | Morbihan (56) | 1 858 | 99,0% |
| Gâvres | 56680 | Morbihan (56) | 996 | 94,0% |
| Gestel | 56530 | Morbihan (56) | 1 347 | 94,0% |
| Groix | 56590 | Morbihan (56) | 3 101 | 95,0% |
| Guidel | 56520 | Morbihan (56) | 8 161 | 93,0% |
| Hennebont | 56700 | Morbihan (56) | 10 542 | 94,0% |
| Inguiniel | 56240 | Morbihan (56) | 1 502 | 5,0% |
| Inzinzac-Lochrist | 56650 | Morbihan (56) | 3 685 | 95,0% |
| Lanester | 56600 | Morbihan (56) | 13 645 | 97,0% |
| Languidic | 56440 | Morbihan (56) | 4 434 | 95,0% |
| Lanvaudan | 56240 | Morbihan (56) | 445 | 5,0% |
| Larmor-Plage | 56260 | Morbihan (56) | 6 492 | 95,0% |
| Locmiquélic | 56570 | Morbihan (56) | 2 679 | 93,0% |
| Lorient | 56100 | Morbihan (56) | 45 410 | 93,0% |
| Ploemeur | 56270 | Morbihan (56) | 12 138 | 93,0% |
| Plouay | 56240 | Morbihan (56) | 3 643 | 91,0% |
| Pont-Scorff | 56620 | Morbihan (56) | 2 450 | 93,0% |
| Port-Louis | 56290 | Morbihan (56) | 2 226 | 91,0% |
| Quéven | 56530 | Morbihan (56) | 5 117 | 97,0% |
| Quistinic | 56310 | Morbihan (56) | 1 360 | 90,0% |
| Riantec | 56670 | Morbihan (56) | 3 940 | 93,0% |