| Castillon-de-Castets | |
| Arrondissement: | Langon |
| Canton: | Le Réolais et Les Bastides |
| Commune: | Castets et Castillon |
| Insee: | 33107 |
| Postal Code: | 33210 |
| Coordinates: | 44.5506°N -0.1142°W |
| Elevation M: | 50 |
| Elevation Min M: | 12 |
| Elevation Max M: | 56 |
| Area Km2: | 4.47 |
| Population: | 292 |
| Population Date: | 2019 |
| Population Footnotes: | [1] |
Castillon-de-Castets (in French pronounced as /kastijɔ̃ də kastɛts/; Gascon: Castilhon de Castèths) is a former commune in the Gironde department in Nouvelle-Aquitaine in southwestern France. On 1 January 2017, it was merged into the new commune Castets et Castillon.[2]