| Commune | Insee | Population |
|---|---|---|
| ARRADON | 56003 | 5 980 |
| ARZON | 56005 | 2 312 |
| BADEN | 56008 | 4 985 |
| BRANDIVY | 56022 | 1 460 |
| COLPO | 56042 | 2 306 |
| ELVEN | 56053 | 6 696 |
| GRAND-CHAMP | 56067 | 5 993 |
| HEZO | 56084 | 921 |
| ILE-AUX-MOINES | 56087 | 649 |
| ILE-D'ARZ | 56088 | 322 |
| LARMOR-BADEN | 56106 | 909 |
| LE BONO | 56262 | 2 658 |
| LOCMARIA-GRAND-CHAMP | 56115 | 1 870 |
| LOCQUELTAS | 56120 | 2 023 |
| MEUCON | 56132 | 2 344 |
| MONTERBLANC | 56137 | 3 418 |
| PLAUDREN | 56157 | 2 024 |
| PLESCOP | 56158 | 6 384 |
| PLOEREN | 56164 | 7 015 |
| PLOUGOUMELEN | 56167 | 2 687 |
| SAINT-ARMEL | 56205 | 902 |
| SAINT-AVE | 56206 | 12 454 |
| SAINT-GILDAS-DE-RHUYS | 56214 | 1 819 |
| SAINT-NOLFF | 56231 | 4 052 |
| SARZEAU | 56240 | 9 246 |
| SENE | 56243 | 9 450 |
| SULNIAC | 56247 | 3 943 |
| SURZUR | 56248 | 5 230 |
| THEIX-NOYALO | 56251 | 8 718 |
| TOUR-DU-PARC | 56252 | 1 268 |
| TREDION | 56254 | 1 389 |
| TREFFLEAN | 56255 | 2 581 |
| TRINITE-SURZUR | 56259 | 1 723 |
| VANNES | 56260 | 56 897 |