San Jacinto, officially the Municipality of San Jacinto, is a 4th class municipality in the province of Pangasinan, Philippines. According to …San Jacinto, officially the Municipality of San Jacinto, is a 4th class municipality in the province of Pangasinan, Philippines. According to the 2020 census, it has a population of 44,351 people. Padre Herminigildo Milgar founded the town on August 17, 1598, which was named after Hyacinth of Poland, canonized on April 17, 1594, by Pope Clement VIII.