This region has 5 departments.
| Code | Name | Administrative seat |
|---|---|---|
| 44 | Loire-Atlantique | Nantes |
| 49 | Maine-et-Loire | Angers |
| 53 | Mayenne | Laval |
| 72 | Sarthe | Le Mans |
| 85 | Vendée | La Roche-sur-Yon |
This region has 1228 communes.
| Code | Name | Population |
|---|---|---|
| 44109 | Nantes | 327 734 |
| 49007 | Angers | 159 022 |
| 72181 | Le Mans | 146 249 |
| 44184 | Saint-Nazaire | 74 568 |
| 85191 | La Roche-sur-Yon | 54 849 |
This region has 122 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 region has 16 arrondissements.
| Code | Name | Administrative seat |
|---|---|---|
| 442 | Nantes | Nantes |
| 443 | Saint-Nazaire | Saint-Nazaire |
| 445 | Châteaubriant-Ancenis | Châteaubriant |
| 491 | Angers | Angers |
| 492 | Cholet | Cholet |
This region has 5 departmental collectivities.