The canton Tonnay-Charente has 15 communes.
| Code | Name | Population ▼ |
|---|---|---|
| 17449 | Tonnay-Charente | 8 289 |
| 17146 | Échillais | 3 765 |
| 17429 | Soubise | 3 316 |
| 17065 | Breuil-Magné | 1 926 |
| 17484 | Port-des-Barques | 1 780 |
| 17346 | Saint-Hippolyte | 1 495 |
| 17075 | Cabariot | 1 481 |
| 17253 | Muron | 1 378 |
| 17463 | Vergeroux | 1 279 |
| 17375 | Saint-Nazaire-sur-Charente | 1 210 |
| 17216 | Lussant | 1 004 |
| 17174 | Genouillé | 872 |
| 17246 | Moragne | 536 |
| 17320 | Saint-Coutant-le-Grand | 417 |
| 17205 | Loire-les-Marais | 381 |