The barangay's total land area is 262 hectares (650 acres). According to the 2015 census, it has a population of 771. In the 2013 electoral roll, it had 443 registered voters, meaning that 57% of the population are aged 18 and over.

San Isidro celebrates its annual fiesta on 21 May in honor of their patron saint.

Located on the eastern part of the municipality, San Isidro is almost entirely surrounded by water – the sea and two rivers – so it resembles an island. It is mostly planted with coconut trees with the east and west given to fish ponds. It is a mainland barangay with plain and hilly dominant characteristics and its type of soil is sandy. Its is bounded to the north by Sentinela, to the east by Tapal, to the south by barangay Union and to the west by Tipolo. It is 5 km (3.1 mi) from the town center, Poblacion.

San Isidro is named after its patron saint, Isidore the Laborer (San Isidro Labrador).

There are six puroks overseen by the elected kagawads.

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Wikipedia