Barangay Casambalangan

Situated in Santa Ana, Cagayan, Barangay Casambalangan is one of 16 barangays that make up the municipality within Cagayan Valley.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Casambalangan had a population of 4,524. This made it the 3rd largest of 16 barangays in Santa Ana by population, placing it in the upper half of the municipality. Residents of Barangay Casambalangan accounted for approximately 12.68% of the total population of Santa Ana, which stood at 35,688 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Casambalangan changed from 4,561 to 4,524, a shift of -0.8% over the five-year period. This places the barangay among those with broadly stable populations in Santa Ana. The Philippine Statistics Authority classifies Barangay Casambalangan as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Santa Ana is a municipality comprising 16 barangays, and serves as the governing unit directly responsible for local services in Barangay Casambalangan, including public health, sanitation, peace and order, and civil registration. Within the wider province of Cagayan, which contains 820 barangays across its component cities and municipalities, Barangay Casambalangan ranks 25th by 2020 population. Cagayan is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Casambalangan 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.