Captieux is a commune of Southwestern France, located in the Gironde department, Nouvelle-Aquitaine. It lies near the border with the Land…Captieux is a commune of Southwestern France, located in the Gironde department, Nouvelle-Aquitaine. It lies near the border with the Landes and the Lot-et-Garonne departments. The commune is in the east of the Parc naturel régional des Landes de Gascogne.