This department has 332 communes.
| Code | Name | Population |
|---|---|---|
| 35238 | Rennes | 230 890 |
| 35288 | Saint-Malo | 47 439 |
| 35115 | Fougères | 20 307 |
| 35047 | Bruz | 19 683 |
| 35360 | Vitré | 19 365 |
This department has 30 cantons.
| Code | Name | Central office |
|---|---|---|
| 3501 | Val-Couesnon | Val-Couesnon |
| 3502 | Bain-de-Bretagne | Bain-de-Bretagne |
| 3503 | Betton | Betton |
| 3504 | Bruz | Bruz |
| 3505 | Châteaugiron | Châteaugiron |
This department has 4 departmental arrondissements.
| Code | Name | Administrative seat |
|---|---|---|
| 351 | Fougères-Vitré | Fougères |
| 352 | Redon | Redon |
| 353 | Rennes | Rennes |
| 354 | Saint-Malo | Saint-Malo |