Barangay San Sebastian

Barangay San Sebastian forms part of City of Tarlac, a city in Tarlac, and is classified as a mid-sized barangay.

According to the 2020 Philippine census, Barangay San Sebastian had a population of 4,231. This made it the 30th largest of 76 barangays in City of Tarlac by population, placing it in the middle tier of the city. Residents of Barangay San Sebastian accounted for approximately 1.10% of the total population of City of Tarlac, which stood at 385,398 in the same census year.

The barangay recorded 3,654 residents in the 2015 intercensal count and 4,231 residents in the 2020 Census — a net change of +15.8%, consistent with a growing settlement. Barangay San Sebastian is officially classified as urban, reflecting the density and built-up character of the area.

City of Tarlac is a city comprising 76 barangays, and serves as the governing unit directly responsible for local services in Barangay San Sebastian, including public health, sanitation, peace and order, and civil registration. Within the wider province of Tarlac, which contains 511 barangays across its component cities and municipalities, Barangay San Sebastian ranks 90th by 2020 population. Tarlac 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.