Barangay San Agustin I

Barangay San Agustin I forms part of City of Dasmariñas, a city in Cavite, and is classified as a large barangay.

According to the 2020 Philippine census, Barangay San Agustin I had a population of 11,971. This made it the 14th largest of 75 barangays in City of Dasmariñas by population, placing it in the upper half of the city. Residents of Barangay San Agustin I accounted for approximately 1.70% of the total population of City of Dasmariñas, which stood at 703,141 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay San Agustin I changed from 8,471 to 11,971, a shift of +41.3% over the five-year period. This places the barangay among those with growing populations in City of Dasmariñas. Barangay San Agustin I is officially classified as urban, reflecting the density and built-up character of the area.

City of Dasmariñas is a city comprising 75 barangays, and serves as the governing unit directly responsible for local services in Barangay San Agustin I, including public health, sanitation, peace and order, and civil registration. Within the wider province of Cavite, which contains 829 barangays across its component cities and municipalities, Barangay San Agustin I ranks 81st by 2020 population. Cavite 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.