Zambales as the second largest province in Central Luzon, which covers an area of 361, 103 hectares, shares common boundaries with Pangasinan on the North, Tarlac and Pampanga on the East and Bataan on the South. The entire stretch of the Province on the west is rimmed by the crystal clear water of vast China Sea.
The topography of the province is generally irregular, with the coastal plains and valleys stretching from Lingayen Gulf down south towards Subic Bay along the western coast and further towards a 175 kms. stretch of shoreline.