Barangay Upper Liason

Situated in Tambulig, Zamboanga Del Sur, Barangay Upper Liason is one of 31 barangays that make up the municipality within Zamboanga Peninsula.

According to the 2020 Philippine census, Barangay Upper Liason had a population of 414. This made it the 28th largest of 31 barangays in Tambulig by population, placing it among the smaller barangays of the municipality. Residents of Barangay Upper Liason accounted for approximately 1.10% of the total population of Tambulig, which stood at 37,480 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Upper Liason moving from 395 residents to 414 residents, an intercensal change of +4.8%. The trajectory indicates a growing community. Barangay Upper Liason is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Tambulig is a municipality comprising 31 barangays, and serves as the governing unit directly responsible for local services in Barangay Upper Liason, including public health, sanitation, peace and order, and civil registration. Within the wider province of Zamboanga Del Sur, which contains 779 barangays across its component cities and municipalities, Barangay Upper Liason ranks 641st by 2020 population. Zamboanga 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.