This commune has 2 associated communes.
| Code | Name |
|---|---|
| 52226 | Gourzon |
| 52408 | Prez-sur-Marne |
| Date | Type | Code | Name |
|---|---|---|---|
| 1973-01-01 | Deletion | 52265 | Laneuville-à-Bayard |
| 1973-01-01 | Association merger | 52226 → 52265 | Gourzon → Bayard-sur-Marne |
| 1973-01-01 | Association merger | 52265 | Laneuville-à-Bayard → Bayard-sur-Marne |
| 1973-01-01 | Association merger | 52408 → 52265 | Prez-sur-Marne → Bayard-sur-Marne |
| 1943-01-01 | Creation | 52265 | Laneuville-à-Bayard |