Barangay Gacbusan

Barangay Gacbusan forms part of Kabasalan, a municipality in Zamboanga Sibugay, and is classified as a small barangay.

According to the 2020 Philippine census, Barangay Gacbusan had a population of 904. This made it the 21st largest of 29 barangays in Kabasalan by population, placing it in the middle tier of the municipality. Residents of Barangay Gacbusan accounted for approximately 1.93% of the total population of Kabasalan, which stood at 46,884 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Gacbusan changed from 956 to 904, a shift of -5.4% over the five-year period. This places the barangay among those with contracting populations in Kabasalan. Barangay Gacbusan is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Kabasalan is a municipality comprising 29 barangays, and serves as the governing unit directly responsible for local services in Barangay Gacbusan, including public health, sanitation, peace and order, and civil registration. Within the wider province of Zamboanga Sibugay, which contains 389 barangays across its component cities and municipalities, Barangay Gacbusan ranks 281st by 2020 population. Zamboanga Sibugay is classified as a 2nd 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.