西里伯斯海
The province has an irregular coastline of in its three coastal towns, which face the Celebes Sea. These coastal areas are prone to tsunamis coming from the Celebes Sea. Approximately 2/3 of Lake Buluan's area is covered by the province in the towns of Lutayan and President Quirino. There are 7 major rivers within the province: Alip, Allah, Kapingkong, Tran, Salaman, Palimbang and Kabulnan. Additionally, there are 23 large creeks and 11 major springs within the province.