Barangay New Iloilo

Barangay New Iloilo forms part of Tantangan, a municipality in South Cotabato, and is classified as a mid-sized barangay.

According to the 2020 Philippine census, Barangay New Iloilo had a population of 4,802. This made it the 3rd largest of 13 barangays in Tantangan by population, placing it in the upper half of the municipality. Residents of Barangay New Iloilo accounted for approximately 10.50% of the total population of Tantangan, which stood at 45,744 in the same census year.

Census comparisons between 2015 and 2020 show Barangay New Iloilo moving from 4,227 residents to 4,802 residents, an intercensal change of +13.6%. The trajectory indicates a growing community. Barangay New Iloilo is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Tantangan is a municipality comprising 13 barangays, and serves as the governing unit directly responsible for local services in Barangay New Iloilo, including public health, sanitation, peace and order, and civil registration. Within the wider province of South Cotabato, which contains 225 barangays across its component cities and municipalities, Barangay New Iloilo ranks 60th by 2020 population. South Cotabato is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay New Iloilo 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.