Zamboanga del Sur (; Chavacano: Provincia del Zamboanga del Sur; ; Subanen: S'helatan Sembwangan/Sembwangan dapit Shelatan) is a province in the Philippines located in the Zamboanga Peninsula region in Mindanao. Its capital is the city of Pagadian. Situated within the Zamboanga del Sur is the highly-urbanized city of Zamboanga, which is governed independently from the province.