Barangay Mongocayo

Barangay Mongocayo forms part of T'boli, a municipality in South Cotabato, and is classified as a mid-sized barangay.

According to the 2020 Philippine census, Barangay Mongocayo had a population of 2,224. This made it the 18th largest of 25 barangays in T'boli by population, placing it in the middle tier of the municipality. Residents of Barangay Mongocayo accounted for approximately 2.20% of the total population of T'boli, which stood at 101,049 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Mongocayo moving from 2,857 residents to 2,224 residents, an intercensal change of -22.2%. The trajectory indicates a contracting community. Barangay Mongocayo is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

T'boli is a municipality comprising 25 barangays, and serves as the governing unit directly responsible for local services in Barangay Mongocayo, 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 Mongocayo ranks 153rd 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.

Like every Philippine barangay, Barangay Mongocayo is led by an elected Punong Barangay (barangay captain) supported by seven Sangguniang Barangay members (kagawads), an SK Chairperson, a Barangay Secretary, and a Barangay Treasurer. The next Barangay and Sangguniang Kabataan Elections (BSKE) are scheduled for Monday, November 2, 2026, with officials serving four-year terms under Republic Act No. 12232.