| Date | Type | Code | Name |
|---|---|---|---|
| 2024-01-01 | Creation of a new commune | 64300 | Lacq |
| 2024-01-01 | Creation of a new commune | 64300 | Lacq |
| 2024-01-01 | Creation of a new commune | 64541 → 64300 | Urdès → Lacq |
| 2014-03-21 | Association merger converted to a simple merger | 64076 → 64300 | Audéjos → Lacq |
| 1972-09-01 | Association merger | 64076 → 64300 | Audéjos → Lacq |
| 1972-09-01 | Association merger | 64300 | Lacq |
| 1943-01-01 | Creation | 64300 | Lacq |