Camarines Sur is a province located in the Bicol Region in Luzon of the Philippines. Its capital is Pili and the province borders Camarines Norte and Quezon to the northwest, and Albay to the south. To the east lies the island province of Catanduanes across the Maqueda Channel.
Camarines Sur is the largest among the six provinces in the Bicol Region both by population and land area. Its territory includes two cities: Naga, the lone chartered city, as the province’s and the region’s religious, cultural, financial, commercial, industrial and business center; and Iriga, a component city, as the center of the Rinconada area and Riŋkonāda Language. Within the province lies Lake Buhi, where the smallest commercially harvested fish, the Sinarapan (Mistichthys luzonensis), can be found.