Calabanga is a first class municipality in the province of Camarines Sur, Philippines. It is composed of 48 barangays, 14 of which are within the urban area and the remaining 34 barangays are within the rural areas. According to the 2010 census, it has a population of 78,119 people,[3] and a land area of 16,380 hectares (40,500 acres),[2]which constitutes 3.1% of the province’s land area.
It is bounded on the west by the Bicol Riverand beyond the municipality of Cabusao; on the south by the municipality of Bombonand Naga City; on the east by the forest lands of Mount Isarog, the Tigman River and each tributary forming the natural boundary and beyond the municipality ofTinambac; on the north by the fishing grounds of San Miguel Bay, and beyond, the municipalities of Sipocot, Basud and Mercedes.