Barangay Poblacion Barangay I

Barangay Poblacion Barangay I forms part of San Jose, a municipality in Batangas, and is classified as a very small barangay.

According to the 2020 Philippine census, Barangay Poblacion Barangay I had a population of 171. This made it the 33rd largest of 33 barangays in San Jose by population, placing it among the smaller barangays of the municipality. Residents of Barangay Poblacion Barangay I accounted for approximately 0.21% of the total population of San Jose, which stood at 79,868 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Poblacion Barangay I changed from 228 to 171, a shift of -25.0% over the five-year period. This places the barangay among those with contracting populations in San Jose. Barangay Poblacion Barangay I is officially classified as urban, reflecting the density and built-up character of the area.

San Jose is a municipality comprising 33 barangays, and serves as the governing unit directly responsible for local services in Barangay Poblacion Barangay I, 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 Poblacion Barangay I ranks 1070th 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.

The barangay's legislative and executive affairs are handled by a Punong Barangay and the Sangguniang Barangay, elected nationwide during the Barangay and SK Elections. The next BSKE is scheduled for Monday, November 2, 2026, following the synchronized election schedule set by COMELEC Resolution No. 11191.