Barangay Casantiagoan

Classified as a small barangay, Barangay Casantiagoan is one of the administrative divisions of Laoac in Pangasinan, Ilocos Region, Philippines.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Casantiagoan had a population of 1,639. This made it the 10th largest of 22 barangays in Laoac by population, placing it in the middle tier of the municipality. Residents of Barangay Casantiagoan accounted for approximately 4.80% of the total population of Laoac, which stood at 34,128 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Casantiagoan moving from 1,575 residents to 1,639 residents, an intercensal change of +4.1%. The trajectory indicates a growing community. The Philippine Statistics Authority classifies Barangay Casantiagoan as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Laoac is a municipality comprising 22 barangays, and serves as the governing unit directly responsible for local services in Barangay Casantiagoan, including public health, sanitation, peace and order, and civil registration. Within the wider province of Pangasinan, which contains 1,364 barangays across its component cities and municipalities, Barangay Casantiagoan ranks 814th by 2020 population. Pangasinan 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 Casantiagoan 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.