| Date | Type | Code | Name |
|---|---|---|---|
| 2016-01-01 | Creation of a new commune | 51030 | Ay |
| 2016-01-01 | Creation of a new commune | 51030 | Ay → Aÿ-Champagne |
| 2016-01-01 | Deletion | 51030 | Ay |
| 2016-01-01 | Creation of a new commune | 51064 → 51030 | Bisseuil → Aÿ-Champagne |
| 2016-01-01 | Creation of a new commune | 51347 → 51030 | Mareuil-sur-Ay → Aÿ-Champagne |
| 1943-01-01 | Creation | 51030 | Ay |