Barangay Santa Lucia Old

Situated in Zaragoza, Nueva Ecija, Barangay Santa Lucia Old is one of 19 barangays that make up the municipality within Central Luzon.

According to the 2020 Philippine census, Barangay Santa Lucia Old had a population of 1,999. This made it the 11th largest of 19 barangays in Zaragoza by population, placing it in the middle tier of the municipality. Residents of Barangay Santa Lucia Old accounted for approximately 3.77% of the total population of Zaragoza, which stood at 53,090 in the same census year.

The barangay recorded 1,759 residents in the 2015 intercensal count and 1,999 residents in the 2020 Census — a net change of +13.6%, consistent with a growing settlement. Barangay Santa Lucia Old is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Zaragoza is a municipality comprising 19 barangays, and serves as the governing unit directly responsible for local services in Barangay Santa Lucia Old, including public health, sanitation, peace and order, and civil registration. Within the wider province of Nueva Ecija, which contains 849 barangays across its component cities and municipalities, Barangay Santa Lucia Old ranks 438th by 2020 population. Nueva Ecija 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 Santa Lucia Old 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.