The canton Morlaix has 10 communes.
| Code | Name | Population ▼ |
|---|---|---|
| 29151 | Morlaix | 15 194 |
| 29254 | Saint-Martin-des-Champs | 4 773 |
| 29023 | Carantec | 3 272 |
| 29163 | Pleyber-Christ | 3 166 |
| 29266 | Saint-Thégonnec Loc-Eguiner | 3 148 |
| 29279 | Taulé | 2 914 |
| 29202 | Plounéour-Ménez | 1 297 |
| 29079 | Henvic | 1 181 |
| 29265 | Sainte-Sève | 1 077 |
| 29132 | Locquénolé | 790 |