Barangay 21 (Pob.)

Barangay 21 (Pob.) forms part of Batangas City, a city in Batangas, and is classified as a small barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay 21 (Pob.) had a population of 680. This made it the 81st largest of 105 barangays in Batangas City by population, placing it among the smaller barangays of the city. Residents of Barangay 21 (Pob.) accounted for approximately 0.19% of the total population of Batangas City, which stood at 351,437 in the same census year.

Census comparisons between 2015 and 2020 show Barangay 21 (Pob.) moving from 693 residents to 680 residents, an intercensal change of -1.9%. The trajectory indicates a broadly stable community. The Philippine Statistics Authority classifies Barangay 21 (Pob.) as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Batangas City is a city comprising 105 barangays, and serves as the governing unit directly responsible for local services in Barangay 21 (Pob.), including public health, sanitation, peace and order, and civil registration. Within the wider province of Batangas, which contains 1,078 barangays across its component cities and municipalities, Barangay 21 (Pob.) ranks 978th by 2020 population. Batangas 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 21 (Pob.) 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.