This commune has 2 delegated communes.
| Code | Name |
|---|---|
| 33106 | Castets-en-Dorthe |
| 33107 | Castillon-de-Castets |
| Date | Type | Code | Name |
|---|---|---|---|
| 2017-01-01 | Deletion | 33106 | Castets-en-Dorthe |
| 2017-01-01 | Creation of a new commune | 33106 | Castets-en-Dorthe → Castets et Castillon |
| 2017-01-01 | Creation of a new commune | 33106 | Castets-en-Dorthe |
| 2017-01-01 | Creation of a new commune | 33107 → 33106 | Castillon-de-Castets → Castets et Castillon |
| 1957-07-13 | Creation | 33106 | Castets-en-Dorthe |
| 1957-07-13 | Name change | 33106 | Castets → Castets-en-Dorthe |
| 1943-01-01 | Creation | 33106 | Castets |