Barangay Wasi-an

Barangay Wasi-an forms part of Rosario, a municipality in Agusan Del Sur, and is classified as a mid-sized barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Wasi-an had a population of 4,651. This made it the 4th largest of 11 barangays in Rosario by population, placing it in the upper half of the municipality. Residents of Barangay Wasi-an accounted for approximately 9.38% of the total population of Rosario, which stood at 49,610 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Wasi-an moving from 4,391 residents to 4,651 residents, an intercensal change of +5.9%. The trajectory indicates a growing community. The Philippine Statistics Authority classifies Barangay Wasi-an as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Rosario is a municipality comprising 11 barangays, and serves as the governing unit directly responsible for local services in Barangay Wasi-an, including public health, sanitation, peace and order, and civil registration. Within the wider province of Agusan Del Sur, which contains 314 barangays across its component cities and municipalities, Barangay Wasi-an ranks 36th by 2020 population. Agusan Del Sur 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.