San Antonio is a 2nd class municipality in the province of Nueva Ecija, Philippines. According to the latest Philippine census, it has a population of 67,446 people in 12,761 households. San Antonio was previously called as the town of Delinquente,it was called as such due to the rebels plying in the area. It was carve from the town of Gapan in 1843 by the order of Governor General Marcelino Oraa, including the town of San Isidro. It is located in between Jaen, Zaragosa, Cabiao, and Concepcion.