Barangay Calalahan

Barangay Calalahan forms part of San Jose, a municipality in Camarines Sur, and is classified as a mid-sized barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Calalahan had a population of 2,849. This made it the 3rd largest of 29 barangays in San Jose by population, placing it among the most populous barangays of the municipality. Residents of Barangay Calalahan accounted for approximately 6.48% of the total population of San Jose, which stood at 43,973 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Calalahan changed from 2,531 to 2,849, a shift of +12.6% over the five-year period. This places the barangay among those with growing populations in San Jose. The Philippine Statistics Authority classifies Barangay Calalahan as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

San Jose is a municipality comprising 29 barangays, and serves as the governing unit directly responsible for local services in Barangay Calalahan, including public health, sanitation, peace and order, and civil registration. Within the wider province of Camarines Sur, which contains 1,063 barangays across its component cities and municipalities, Barangay Calalahan ranks 187th by 2020 population. Camarines Sur is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Like every Philippine barangay, Barangay Calalahan is led by an elected Punong Barangay (barangay captain) supported by seven Sangguniang Barangay members (kagawads), an SK Chairperson, a Barangay Secretary, and a Barangay Treasurer. The next Barangay and Sangguniang Kabataan Elections (BSKE) are scheduled for Monday, November 2, 2026, with officials serving four-year terms under Republic Act No. 12232.