Barangay Tubotubo South

Barangay Tubotubo South is a mid-sized barangay in the municipality of Santa Cruz, located in the province of Zambales, in the Central Luzon region of the Philippines.

According to the 2020 Philippine census, Barangay Tubotubo South had a population of 2,419. This made it the 15th largest of 25 barangays in Santa Cruz by population, placing it in the middle tier of the municipality. Residents of Barangay Tubotubo South accounted for approximately 3.79% of the total population of Santa Cruz, which stood at 63,839 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Tubotubo South moving from 2,062 residents to 2,419 residents, an intercensal change of +17.3%. The trajectory indicates a growing community. Barangay Tubotubo South is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Santa Cruz is a municipality comprising 25 barangays, and serves as the governing unit directly responsible for local services in Barangay Tubotubo South, including public health, sanitation, peace and order, and civil registration. Within the wider province of Zambales, which contains 247 barangays across its component cities and municipalities, Barangay Tubotubo South ranks 89th by 2020 population. Zambales is classified as a 2nd by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Tubotubo South is governed by an elected Sangguniang Barangay composed of a Punong Barangay and seven kagawads, with the Sangguniang Kabataan representing the youth. The next BSKE, set for Monday, November 2, 2026, will elect officials to four-year terms as provided under Republic Act No. 12232.