Barangay Pto. Rivas Ibaba

Classified as a mid-sized barangay, Barangay Pto. Rivas Ibaba is one of the administrative divisions of City of Balanga in Bataan, Central Luzon, Philippines.

According to the 2020 Philippine census, Barangay Pto. Rivas Ibaba had a population of 4,287. This made it the 8th largest of 25 barangays in City of Balanga by population, placing it in the upper half of the city. Residents of Barangay Pto. Rivas Ibaba accounted for approximately 4.12% of the total population of City of Balanga, which stood at 104,173 in the same census year.

The barangay recorded 4,315 residents in the 2015 intercensal count and 4,287 residents in the 2020 Census — a net change of -0.6%, consistent with a broadly stable settlement. Barangay Pto. Rivas Ibaba is officially classified as urban, reflecting the density and built-up character of the area.

City of Balanga is a city comprising 25 barangays, and serves as the governing unit directly responsible for local services in Barangay Pto. Rivas Ibaba, including public health, sanitation, peace and order, and civil registration. Within the wider province of Bataan, which contains 237 barangays across its component cities and municipalities, Barangay Pto. Rivas Ibaba ranks 69th by 2020 population. Bataan is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

The barangay's legislative and executive affairs are handled by a Punong Barangay and the Sangguniang Barangay, elected nationwide during the Barangay and SK Elections. The next BSKE is scheduled for Monday, November 2, 2026, following the synchronized election schedule set by COMELEC Resolution No. 11191.