| Date | Type | Code | Name |
|---|---|---|---|
| 2019-01-01 | Creation of a new commune | 35308 | Saint-Pierre-de-Plesguen → Mesnil-Roc'h |
| 2019-01-01 | Creation of a new commune | 35308 | Saint-Pierre-de-Plesguen |
| 2019-01-01 | Deletion | 35308 | Saint-Pierre-de-Plesguen |
| 2019-01-01 | Creation of a new commune | 35147 → 35308 | Lanhélin → Mesnil-Roc'h |
| 2019-01-01 | Creation of a new commune | 35344 → 35308 | Tressé → Mesnil-Roc'h |
| 1943-01-01 | Creation | 35308 | Saint-Pierre-de-Plesguen |