This department has 207 communes.
| Code | Name | Population |
|---|---|---|
| 44109 | Nantes | 327 734 |
| 44184 | Saint-Nazaire | 74 568 |
| 44162 | Saint-Herblain | 50 973 |
| 44143 | Rezé | 43 556 |
| 44190 | Saint-Sébastien-sur-Loire | 28 596 |
This department has 36 cantons.
| Code | Name | Central office |
|---|---|---|
| 4401 | Ancenis-Saint-Géréon | Ancenis-Saint-Géréon |
| 4402 | La Baule-Escoublac | La Baule-Escoublac |
| 4403 | Blain | Blain |
| 4404 | Carquefou | Carquefou |
| 4405 | La Chapelle-sur-Erdre | La Chapelle-sur-Erdre |
This department has 3 departmental arrondissements.
| Code | Name | Administrative seat |
|---|---|---|
| 442 | Nantes | Nantes |
| 443 | Saint-Nazaire | Saint-Nazaire |
| 445 | Châteaubriant-Ancenis | Châteaubriant |