Barangay Tambac

Barangay Tambac forms part of Tulunan, a municipality in Cotabato, and is classified as a small barangay.

According to the 2020 Philippine census, Barangay Tambac had a population of 1,226. This made it the 20th largest of 29 barangays in Tulunan by population, placing it in the middle tier of the municipality. Residents of Barangay Tambac accounted for approximately 2.01% of the total population of Tulunan, which stood at 60,978 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Tambac changed from 1,224 to 1,226, a shift of +0.2% over the five-year period. This places the barangay among those with slowly expanding populations in Tulunan. Barangay Tambac is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Tulunan is a municipality comprising 29 barangays, and serves as the governing unit directly responsible for local services in Barangay Tambac, including public health, sanitation, peace and order, and civil registration. Within the wider province of Cotabato, which contains 543 barangays across its component cities and municipalities, Barangay Tambac ranks 381st by 2020 population. Cotabato is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Tambac 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.