Zambales's at-large congressional district refers to the lone congressional district of the Philippines in the province of Zambales for various national legislatures before 1987. The province elected its representatives province-wide at-large from its reorganization under Article 6 of the Decreto de 18 junio de 1898 y las instrucciones sobre el régimen de las provincias y pueblos for the Malolos Congress in 1898 until the reapportionment in 1987 under Section 1 of the ordinance annex of the 1987 Constitution of the Philippines which created its first and second districts. It was a single-member district throughout the ten legislatures of the Insular Government of the Philippine Islands from 1907 to 1935, the three legislatures of the Philippine Commonwealth from 1935 to 1946, the seven con