Barangay Cagsiay I

Barangay Cagsiay I forms part of Mauban, a municipality in Quezon, and is classified as a mid-sized barangay.

According to the 2020 Philippine census, Barangay Cagsiay I had a population of 3,704. This made it the 8th largest of 40 barangays in Mauban by population, placing it in the upper half of the municipality. Residents of Barangay Cagsiay I accounted for approximately 5.21% of the total population of Mauban, which stood at 71,081 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Cagsiay I moving from 3,149 residents to 3,704 residents, an intercensal change of +17.6%. The trajectory indicates a growing community. Barangay Cagsiay I is officially classified as urban, reflecting the density and built-up character of the area.

Mauban is a municipality comprising 40 barangays, and serves as the governing unit directly responsible for local services in Barangay Cagsiay I, including public health, sanitation, peace and order, and civil registration. Within the wider province of Quezon, which contains 1,242 barangays across its component cities and municipalities, Barangay Cagsiay I ranks 123rd by 2020 population. Quezon is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Cagsiay I 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.