Barangay San Antonio

Barangay San Antonio forms part of Science City of Muñoz, a city in Nueva Ecija, and is classified as a mid-sized barangay.

According to the 2020 Philippine census, Barangay San Antonio had a population of 2,305. This made it the 16th largest of 37 barangays in Science City of Muñoz by population, placing it in the middle tier of the city. Residents of Barangay San Antonio accounted for approximately 2.73% of the total population of Science City of Muñoz, which stood at 84,308 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay San Antonio changed from 2,166 to 2,305, a shift of +6.4% over the five-year period. This places the barangay among those with growing populations in Science City of Muñoz. Barangay San Antonio is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Science City of Muñoz is a city comprising 37 barangays, and serves as the governing unit directly responsible for local services in Barangay San Antonio, including public health, sanitation, peace and order, and civil registration. Within the wider province of Nueva Ecija, which contains 849 barangays across its component cities and municipalities, Barangay San Antonio ranks 373rd by 2020 population. Nueva Ecija 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 San Antonio 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.