The canton Douarnenez has 16 communes.
| Code | Name | Population ▼ |
|---|---|---|
| 29046 | Douarnenez | 14 068 |
| 29197 | Plouhinec | 3 919 |
| 29003 | Audierne | 3 727 |
| 29218 | Pont-Croix | 1 669 |
| 29226 | Poullan-sur-Mer | 1 453 |
| 29224 | Pouldergat | 1 213 |
| 29168 | Plogoff | 1 131 |
| 29143 | Mahalon | 1 021 |
| 29008 | Beuzec-Cap-Sizun | 1 008 |
| 29028 | Cléden-Cap-Sizun | 916 |
| 29145 | Confort-Meilars | 861 |
| 29090 | Kerlaz | 805 |
| 29087 | Le Juch | 765 |
| 29228 | Primelin | 650 |
| 29063 | Goulien | 446 |
| 29083 | Île-de-Sein | 263 |