| Date | Type | Code | Name |
|---|---|---|---|
| 2018-01-01 | Association merger converted to a simple merger | 50067 → 50531 | La Boulouze → Saint-Ovin |
| 1985-01-01 | Restoration | 50531 → 50317 | Saint-Ovin → Le Mesnil-Ozenne |
| 1985-01-01 | Restoration | 50531 | Saint-Ovin |
| 1973-01-01 | Deletion | 50531 | Saint-Osvin |
| 1973-01-01 | Association merger | 50067 → 50531 | La Boulouze → Saint-Ovin |
| 1973-01-01 | Association merger | 50317 → 50531 | Le Mesnil-Ozenne → Saint-Ovin |
| 1973-01-01 | Association merger | 50531 | Saint-Osvin → Saint-Ovin |
| 1943-01-01 | Creation | 50531 | Saint-Osvin |