This department has 462 communes.
| Code | Name | Population |
|---|---|---|
| 17300 | La Rochelle | 79 851 |
| 17415 | Saintes | 25 363 |
| 17299 | Rochefort | 23 460 |
| 17306 | Royan | 19 425 |
| 17028 | Aytré | 9 746 |
This department has 28 cantons.
| Code | Name | Central office |
|---|---|---|
| 1701 | Aytré | Aytré |
| 1702 | Chaniers | Chaniers |
| 1703 | Châtelaillon-Plage | Châtelaillon-Plage |
| 1704 | L'Île d'Oléron | Saint-Pierre-d'Oléron |
| 1705 | L'Île de Ré | Saint-Martin-de-Ré |
This department has 5 departmental arrondissements.
| Code | Name | Administrative seat |
|---|---|---|
| 171 | Jonzac | Jonzac |
| 172 | Rochefort | Rochefort |
| 173 | La Rochelle | La Rochelle |
| 174 | Saintes | Saintes |
| 175 | Saint-Jean-d'Angély | Saint-Jean-d'Angély |