[4] Castillejos was established in 1743 by Tagalog settler families who migrated from Bataan.[6][7] A strong magnitude 6.1 earthquake occurred on 5:11pm (UTC+08:00), April 22, 2019, according to PHIVOLCS.In the 2020 census, the population of Castillejos was 67,889 people,[4] with a density of 730 inhabitants per square kilometre or 1,900 inhabitants per square mile.Poverty incidence of Castillejos Source: Philippine Statistics Authority[15][16][17][18][19][20][21][22] College/University:This article about a location in Central Luzon region is a stub.