| 2025-01-01 | Deletion of a delegated commune | 50099 | Carentan → Carentan-les-Marais |
| 2025-01-01 | Deletion of a delegated commune | 50485 → 50099 | Saint-Hilaire-Petitville → Carentan-les-Marais |
| 2025-01-01 | Deletion of a delegated commune | 50636 → 50099 | Vierville → Carentan-les-Marais |
| 2019-01-01 | Deletion | 50099 | Carentan les Marais |
| 2019-01-01 | Creation of a new commune | 50089 → 50099 | Brucheville → Carentan-les-Marais |
| 2019-01-01 | Creation of a new commune | 50099 | Carentan les Marais → Carentan-les-Marais |
| 2019-01-01 | Creation of a new commune | 50107 → 50099 | Catz → Carentan-les-Marais |
| 2019-01-01 | Creation of a new commune | 50348 → 50099 | Montmartin-en-Graignes → Carentan-les-Marais |
| 2019-01-01 | Creation of a new commune | 50485 → 50099 | Saint-Hilaire-Petitville → Carentan-les-Marais |
| 2019-01-01 | Creation of a new commune | 50636 → 50099 | Vierville → Carentan-les-Marais |
| 2017-01-01 | Creation of a new commune | 50010 → 50099 | Angoville-au-Plain → Carentan les Marais |
| 2017-01-01 | Creation of a new commune | 50080 → 50099 | Brévands → Carentan les Marais |
| 2017-01-01 | Creation of a new commune | 50099 | Carentan les Marais → Carentan |
| 2017-01-01 | Creation of a new commune | 50099 | Carentan |
| 2017-01-01 | Creation of a new commune | 50099 | Carentan les Marais |
| 2017-01-01 | Creation of a new commune | 50099 | Carentan → Carentan les Marais |
| 2017-01-01 | Creation of a new commune | 50249 → 50099 | Houesville → Carentan les Marais |
| 2017-01-01 | Creation of a new commune | 50458 → 50099 | Saint-Côme-du-Mont → Carentan les Marais |
| 2017-01-01 | Creation of a new commune | 50534 → 50099 | Saint-Pellerin → Carentan les Marais |
| 2017-01-01 | Creation of a new commune | 50631 → 50099 | Les Veys → Carentan les Marais |
| 2016-01-01 | Deletion | 50099 | Carentan |
| 2016-01-01 | Creation of a new commune | 50010 → 50099 | Angoville-au-Plain → Carentan les Marais |
| 2016-01-01 | Creation of a new commune | 50099 | Carentan |
| 2016-01-01 | Creation of a new commune | 50099 | Carentan → Carentan les Marais |
| 2016-01-01 | Creation of a new commune | 50249 → 50099 | Houesville → Carentan les Marais |
| 2016-01-01 | Creation of a new commune | 50458 → 50099 | Saint-Côme-du-Mont → Carentan les Marais |
| 1943-01-01 | Creation | 50099 | Carentan |