Agonac is a commune in the Dordogne department in Nouvelle-Aquitaine in southwestern France. It is situated on the small river Beauronne, 1…Agonac is a commune in the Dordogne department in Nouvelle-Aquitaine in southwestern France. It is situated on the small river Beauronne, 12 km north of Périgueux. Agonac station has rail connections to Bordeaux, Périgueux and Limoges.