Castillon-de-Castets

{{Infobox French commune

|name = Castillon-de-Castets

|image = Castillon-de-Castets Mairie.jpg

|caption = Town hall

|arrondissement = Langon

|canton = Le Réolais et Les Bastides

|commune = Castets et Castillon

|INSEE = 33107

|postal code = 33210

|coordinates = {{coord|44.5506|-0.1142|format=dms|display=inline,title}}

|elevation m = 50

|elevation min m = 12

|elevation max m = 56

|area km2 = 4.47

|population = 288

|population date = 2022

|population footnotes = {{cite web|url=https://www.insee.fr/fr/statistiques/fichier/8290591/ensemble.pdf|title=Populations de référence 2022|language=fr|trans-title=Reference populations 2022|publisher=INSEE|date=December 2024}}

}}

Castillon-de-Castets ({{IPA|fr|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.[https://www.legifrance.gouv.fr/eli/arrete/2016/8/1/INTB1622460A/jo/texte Arrêté préfectoral] 1 August 2016 {{in lang|fr}}