The canton L'île-Rousse has 21 communes.
| Code | Name | Population ▼ |
|---|---|---|
| 2B134 | L'Île-Rousse | 3 231 |
| 2B168 | Monticello | 2 065 |
| 2B316 | Santa-Reparata-di-Balagna | 1 024 |
| 2B093 | Corbara | 962 |
| 2B034 | Belgodère | 835 |
| 2B332 | Urtaca | 263 |
| 2B290 | Speloncato | 261 |
| 2B173 | Muro | 243 |
| 2B182 | Occhiatana | 235 |
| 2B112 | Feliceto | 232 |
| 2B199 | Palasca | 222 |
| 2B352 | Ville-di-Paraso | 205 |
| 2B190 | Olmi-Cappella | 190 |
| 2B136 | Lama | 155 |
| 2B231 | Pigna | 128 |
| 2B175 | Nessa | 122 |
| 2B235 | Pioggiola | 87 |
| 2B180 | Novella | 80 |
| 2B097 | Costa | 49 |
| 2B339 | Vallica | 29 |
| 2B156 | Mausoléo | 24 |