Barangay San Lucas 1

Barangay San Lucas 1 forms part of City of San Pablo, a city in Laguna, and is classified as a large barangay.

According to the 2020 Philippine census, Barangay San Lucas 1 had a population of 6,127. This made it the 12th largest of 80 barangays in City of San Pablo by population, placing it in the upper half of the city. Residents of Barangay San Lucas 1 accounted for approximately 2.15% of the total population of City of San Pablo, which stood at 285,348 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Lucas 1 moving from 6,014 residents to 6,127 residents, an intercensal change of +1.9%. The trajectory indicates a slowly expanding community. Barangay San Lucas 1 is officially classified as urban, reflecting the density and built-up character of the area.

City of San Pablo is a city comprising 80 barangays, and serves as the governing unit directly responsible for local services in Barangay San Lucas 1, including public health, sanitation, peace and order, and civil registration. Within the wider province of Laguna, which contains 681 barangays across its component cities and municipalities, Barangay San Lucas 1 ranks 142nd by 2020 population. Laguna 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.