Barangay Santa Catalina

Barangay Santa Catalina forms part of Tumauini, a municipality in Isabela, and is classified as a small barangay.

According to the 2020 Philippine census, Barangay Santa Catalina had a population of 998. This made it the 34th largest of 46 barangays in Tumauini by population, placing it among the smaller barangays of the municipality. Residents of Barangay Santa Catalina accounted for approximately 1.41% of the total population of Tumauini, which stood at 70,743 in the same census year.

The barangay recorded 772 residents in the 2015 intercensal count and 998 residents in the 2020 Census — a net change of +29.3%, consistent with a growing settlement. Barangay Santa Catalina is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Tumauini is a municipality comprising 46 barangays, and serves as the governing unit directly responsible for local services in Barangay Santa Catalina, including public health, sanitation, peace and order, and civil registration. Within the wider province of Isabela, which contains 1,055 barangays across its component cities and municipalities, Barangay Santa Catalina ranks 656th by 2020 population. Isabela 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 Santa Catalina 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.