Barangay Matingain I

Barangay Matingain I forms part of Lemery, a municipality in Batangas, and is classified as a mid-sized barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Matingain I had a population of 3,773. This made it the 3rd largest of 46 barangays in Lemery by population, placing it among the most populous barangays of the municipality. Residents of Barangay Matingain I accounted for approximately 4.05% of the total population of Lemery, which stood at 93,186 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Matingain I changed from 3,543 to 3,773, a shift of +6.5% over the five-year period. This places the barangay among those with growing populations in Lemery. The Philippine Statistics Authority classifies Barangay Matingain I as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Lemery is a municipality comprising 46 barangays, and serves as the governing unit directly responsible for local services in Barangay Matingain I, including public health, sanitation, peace and order, and civil registration. Within the wider province of Batangas, which contains 1,078 barangays across its component cities and municipalities, Barangay Matingain I ranks 198th by 2020 population. Batangas 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.