The canton Châtellerault-1 has 8 communes.
| Code | Name | Population ▼ |
|---|---|---|
| 86066 | Châtellerault | 31 003 |
| 86174 | Naintré | 5 964 |
| 86272 | Thuré | 2 765 |
| 86128 | Lencloître | 2 483 |
| 86258 | Scorbé-Clairvaux | 2 174 |
| 86081 | Colombiers | 1 405 |
| 86221 | Saint-Genest-d'Ambière | 1 235 |
| 86184 | Ouzilly | 961 |