Barangay San Isidro

Barangay San Isidro is a small barangay in the municipality of Dumalneg, located in the province of Ilocos Norte, in the Ilocos Region region of the Philippines.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Isidro had a population of 1,026. This made it the 1st largest of 4 barangays in Dumalneg by population, placing it among the most populous barangays of the municipality. Residents of Barangay San Isidro accounted for approximately 33.24% of the total population of Dumalneg, which stood at 3,087 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay San Isidro changed from 983 to 1,026, a shift of +4.4% over the five-year period. This places the barangay among those with growing populations in Dumalneg. The Philippine Statistics Authority classifies Barangay San Isidro as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Dumalneg is a municipality comprising 4 barangays, and serves as the governing unit directly responsible for local services in Barangay San Isidro, including public health, sanitation, peace and order, and civil registration. Within the wider province of Ilocos Norte, which contains 559 barangays across its component cities and municipalities, Barangay San Isidro ranks 259th by 2020 population. Ilocos Norte 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.