San Antonio, officially the Municipality of San Antonio (, Kapampangan: Balen ning San Antonio), is a municipality in the province of Nueva Ecija, Philippines. According to the , it has a population of people.
It is bounded by the towns of Jaen to its eastern side; Zaragosa to the north; Cabiao and San Isidro, and Concepcion in the Province of Tarlac to its west.
The present name of the town was given by Father Leocadio Luis, the first priest of the town, in 1843 in honor of its patron saint, San Antonio Abad. Before its organization and recognition as a town by means of a decree promulgated during the Spanish regime, this was a barangay of Gapan and was known as Barrio Delinquente.
San Antonio was previously called as the barrio of Delinquente (lit. "outlaw") as residents claimed that the name Delinquente originated from the sinking of a casco (big boat) fully loaded with palay in Pampanga River.
The movement of the separation of Barrio Delinquente from the town of Gapan, and its organization as an independent municipality began in 1839. The petition of the residents of Barrio Delinquente was finally approved in November 1842 but the definite separation from the town of Gapan took place in 1843. San Antonio, along with its mother town of Gapan, Aliaga, Cabiao, and San Isidro were transferred from Pampanga to Nueva Ecija in 1848.
San Antonio is politically divided into 16 barangays. Each barangay consists of puroks and some have sitios.
Municipal elected official (2022âÂÂpresent):
The San Antonio Schools District Office governs all educational institutions within the municipality. It oversees the management and operations of all private and public, from primary to secondary schools.