Pampanga is located in the central part of Region III. It is bounded on the north of Tarlac and Nueva Ecija, on the east by Bulacan, southwest by Bataan and west by Zambales. It's terrain is relatively flat with only one distinct mountain, Mount Arayat. Its land area is 2,180.68 sq. kms. Its terrain is relatively flat with only one distinct mountain, the Mt. Arayat. Among its municipalities, Porac has the largest land area with 343 sq. km.; Can­ daba comes next with 208.7 sq. km.; Lubao is the third largest with 155.77 sq. km. The province is divided into 4 congressional districts. It is composed of 19 municipalities, 3 cities and 538 barangays. The City of San Fernando is the capital of the province and serves as the government seat of Central Luzon.