Barangay Judge Roman Cruz Sr.

Barangay Judge Roman Cruz Sr. forms part of Hermosa, a municipality in Bataan, and is classified as a mid-sized barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Judge Roman Cruz Sr. had a population of 4,544. This made it the 6th largest of 23 barangays in Hermosa by population, placing it in the upper half of the municipality. Residents of Barangay Judge Roman Cruz Sr. accounted for approximately 5.87% of the total population of Hermosa, which stood at 77,443 in the same census year.

The barangay recorded 3,816 residents in the 2015 intercensal count and 4,544 residents in the 2020 Census — a net change of +19.1%, consistent with a growing settlement. The Philippine Statistics Authority classifies Barangay Judge Roman Cruz Sr. as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Hermosa is a municipality comprising 23 barangays, and serves as the governing unit directly responsible for local services in Barangay Judge Roman Cruz Sr., 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 Judge Roman Cruz Sr. ranks 65th 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.