Barangay San Martin I

Barangay San Martin I forms part of City of San Jose Del Monte, a city in Bulacan, and is classified as a mid-sized barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Martin I had a population of 4,095. This made it the 32nd largest of 59 barangays in City of San Jose Del Monte by population, placing it in the middle tier of the city. Residents of Barangay San Martin I accounted for approximately 0.63% of the total population of City of San Jose Del Monte, which stood at 651,813 in the same census year.

The barangay recorded 3,897 residents in the 2015 intercensal count and 4,095 residents in the 2020 Census — a net change of +5.1%, consistent with a growing settlement. The Philippine Statistics Authority classifies Barangay San Martin I as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

City of San Jose Del Monte is a city comprising 59 barangays, and serves as the governing unit directly responsible for local services in Barangay San Martin I, 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 San Martin I ranks 299th 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.

Barangay San Martin I 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.