San Simon, officially the Municipality of San Simon, is a municipality in the province of Pampanga, Philippines. According to the 2020 census, it …San Simon, officially the Municipality of San Simon, is a municipality in the province of Pampanga, Philippines. According to the 2020 census, it has a population of 59,182 people. In 1770, Don Mariano del Pilar de los Reyes founded a farming village named 'Barrio Del Pilar', which later became the town of San Simon. The village was located between the towns of San Luis in the north and Apalit in the south. As the population of the village kept on growing, the village leaders of that time petitioned to consolidate the village and portions of the towns of San Luis and Apalit, to form an independent pueblo.