Castillejos, officially the Municipality of Castillejos (Ilocano: Ili ti Castillejos; Tagalog: Bayan ng Castillejos), is a 3rd class municipality in the province of Zambales, Philippines. According to the 2020 census, it has a population of 67,889 people. [4] History. Historical marker installed in 1955 at the municipal hall. More @Wikipedia
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