Barangay Ampid I

Barangay Ampid I forms part of San Mateo, a municipality in Rizal, and is classified as a very large barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Ampid I had a population of 27,346. This made it the 4th largest of 15 barangays in San Mateo by population, placing it in the upper half of the municipality. Residents of Barangay Ampid I accounted for approximately 10.01% of the total population of San Mateo, which stood at 273,306 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Ampid I changed from 28,840 to 27,346, a shift of -5.2% over the five-year period. This places the barangay among those with contracting populations in San Mateo. The Philippine Statistics Authority classifies Barangay Ampid I as urban, reflecting the density and built-up character of the area.

San Mateo is a municipality comprising 15 barangays, and serves as the governing unit directly responsible for local services in Barangay Ampid I, including public health, sanitation, peace and order, and civil registration. Within the wider province of Rizal, which contains 189 barangays across its component cities and municipalities, Barangay Ampid I ranks 35th by 2020 population. Rizal 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 Ampid I 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.