Central Luzon (or Gitnang Luzon in Filipino) , also known as Region III (or Region 3), is an administrative division or region of the Republic of the Philippines, primarily serve to organize the 7 provinces of the vast central plain of the island of Luzon (the largest island), for administrative convenience. The region contains the largest plain in the country and produces most of the country’s rice supply, earning itself the nickname “Rice Bowl of the Philippines”.