| Date | Type | Code | Name |
|---|---|---|---|
| 2019-01-01 | Creation of a new commune | 50412 | Portbail → Port-Bail-sur-Mer |
| 2019-01-01 | Creation of a new commune | 50412 | Portbail |
| 2019-01-01 | Deletion | 50412 | Portbail |
| 2019-01-01 | Creation of a new commune | 50160 → 50412 | Denneville → Port-Bail-sur-Mer |
| 2019-01-01 | Creation of a new commune | 50503 → 50412 | Saint-Lô-d'Ourville → Port-Bail-sur-Mer |
| 1943-01-01 | Creation | 50412 | Portbail |