Barangay Napo

Barangay Napo forms part of Santo Domingo, a municipality in Ilocos Sur, and is classified as a small barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Napo had a population of 517. This made it the 30th largest of 36 barangays in Santo Domingo by population, placing it among the smaller barangays of the municipality. Residents of Barangay Napo accounted for approximately 1.78% of the total population of Santo Domingo, which stood at 29,041 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Napo moving from 554 residents to 517 residents, an intercensal change of -6.7%. The trajectory indicates a contracting community. The Philippine Statistics Authority classifies Barangay Napo as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Santo Domingo is a municipality comprising 36 barangays, and serves as the governing unit directly responsible for local services in Barangay Napo, including public health, sanitation, peace and order, and civil registration. Within the wider province of Ilocos Sur, which contains 768 barangays across its component cities and municipalities, Barangay Napo ranks 568th by 2020 population. Ilocos Sur is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Napo 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.