Central Luzon, designated as Region III, is an administrative region in the Philippines, primarily serving to organize the 7 provinces of the vast central plains of the island of Luzon, 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 Granary of the Philippines". Its provinces are: Aurora, Bataan, Bulacan, Nueva Ecija, Pampanga, Tarlac and Zambales.