The canton Le Bassin chaurien has 22 communes.
| Code | Name | Population ▼ |
|---|---|---|
| 11076 | Castelnaudary | 12 151 |
| 11430 | Villeneuve-la-Comptal | 1 448 |
| 11178 | Labastide-d'Anjou | 1 255 |
| 11356 | Saint-Martin-Lalande | 1 107 |
| 11225 | Mas-Saintes-Puelles | 923 |
| 11192 | Lasbordes | 846 |
| 11361 | Saint-Papoul | 835 |
| 11138 | Fendeille | 658 |
| 11243 | Montferrand | 622 |
| 11175 | Issel | 483 |
| 11284 | Peyrens | 454 |
| 11252 | Montmaur | 356 |
| 11382 | Souilhanels | 356 |
| 11383 | Souilhe | 354 |
| 11313 | Ricaud | 331 |
| 11074 | Les Cassés | 319 |
| 11385 | Soupex | 243 |
| 11362 | Saint-Paulet | 205 |
| 11002 | Airoux | 201 |
| 11292 | La Pomarède | 188 |
| 11300 | Puginier | 153 |
| 11399 | Tréville | 110 |