Coteaux du Blanzacais () is a commune in the department of Charente, southwestern France. The municipality was established on 1 January 2017 by merger of the former communes of Blanzac-Porcheresse (the seat) and Cressac-Saint-Genis. On 1 January 2019, the former commune of Saint-Léger was merged into Coteaux du Blanzacais.