This department has 24 communes.
| Code | Name | Population |
|---|---|---|
| 97411 | Saint-Denis | 155 634 |
| 97415 | Saint-Paul | 108 088 |
| 97416 | Saint-Pierre | 85 038 |
| 97422 | Le Tampon | 82 579 |
| 97409 | Saint-André | 58 885 |
This department has 34 cantons.
| Code | Name | Central office |
|---|---|---|
| 97401 | L'Étang-Salé | L'Étang-Salé |
| 97402 | Le Port | Le Port |
| 97403 | La Possession | La Possession |
| 97404 | Saint-André-1 | Saint-André |
| 97405 | Saint-André-2 | Saint-André |
This department has 4 departmental arrondissements.
| Code | Name | Administrative seat |
|---|---|---|
| 9741 | Saint-Denis | Saint-Denis |
| 9742 | Saint-Pierre | Saint-Pierre |
| 9743 | Saint-Benoît | Saint-Benoît |
| 9744 | Saint-Paul | Saint-Paul |