Barangay Santo Rosario (Pob.)

Barangay Santo Rosario (Pob.) forms part of City of Malolos, a city in Bulacan, and is classified as a large barangay.

According to the 2020 Philippine census, Barangay Santo Rosario (Pob.) had a population of 7,333. This made it the 12th largest of 51 barangays in City of Malolos by population, placing it in the upper half of the city. Residents of Barangay Santo Rosario (Pob.) accounted for approximately 2.81% of the total population of City of Malolos, which stood at 261,189 in the same census year.

The barangay recorded 7,633 residents in the 2015 intercensal count and 7,333 residents in the 2020 Census — a net change of -3.9%, consistent with a contracting settlement. Barangay Santo Rosario (Pob.) is officially classified as urban, reflecting the density and built-up character of the area.

City of Malolos is a city comprising 51 barangays, and serves as the governing unit directly responsible for local services in Barangay Santo Rosario (Pob.), including public health, sanitation, peace and order, and civil registration. Within the wider province of Bulacan, which contains 569 barangays across its component cities and municipalities, Barangay Santo Rosario (Pob.) ranks 152nd by 2020 population. Bulacan 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 Santo Rosario (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.