BENGUET, with the City of Baguio, two (2) - First District: Baguio City; Second District: all the Municipalities of Benguet.

ILOCOS NORTE, with Laog City, two (2) - First District: Laoag City and the Municipalities of Bacarra, Bangui, Burgos, Pagud-Pagud, Pasuquin, Piddig, Sarrat, Vintar, Adams, Carasi, and Dumalneg; Second District: Municipalities of Badoc, Batac, Currimao, Dingras, Espiritu, Marcos, Nueva Era, Paoay, Pinili, San Nicolas, and Solsona.

ILOCOS SUR, two (2) - First District: Municipalities of Bantay, Cabugao, Caoayan, Magsingal, San Ildefonso, San Juan, San Vicente, San Catalina, Santo Domingo, Sinait, and Vigan; Second District: Municipalities of Alilem, Banayoyo, Burgos, Candon, Cervantes, Galimuyod, Gregorio del Pilar, Lidlidda, Nagbukel, Narvacan, Quirino, Salcedo, San Emilio, San Esteban, Santa, Santa Cruz, Santa Lucia, Santa Maria, Santiago, Suyo, Tagudin, Sigay, and Sugpon.

LA UNION, two (2) - First District : Municipalities of Bacnotan, Balaoan, Bangar, Luna, San Fernando, San Gabriel, San Juan, Santol, and Sudipen; Second District: Municipalities of Agoo, Aringay, Bagulin, Bauang, Burgos, Caba, Naguilian, Pugo, Rosario, Santo Tomas, and Tubao.

MOUNTAIN PROVINCE, one (1)

PANGASINAN, with the Cities of Dagupan and San Carlos, six (6) - First District: Municipalities of Bolinao, Bani, Agno, Burgos, Dasol, Infanta, Mabini, Alaminos, Anda and Sual; Second District: Municipalities of Labrador, Lingayen, Bugallon, Aguilar, Mangatarem, Binmaley, Urbiztondo, and Basista; Third District: San Carlos City, and the Municipalities of Malasiqui, Bayambang, Calasiao, Mapandan, and Sta. Barbara; Fourth District: Dagupan City and the Municipalities of Mangaldan, San Fabian, San Jacinto, and Manaoag; Fifth District: Municipalities of Binalonan, Laoac, Urdaneta, Villasis, Sison, Pozorrubio, Bautista, Alcala, and Sto. Tomas; Sixth District: Municipalities of Rosales, Asingan, Balungao, Sta. Maria, Umingan, San Quintin, Natividad, Tayug, San Nicolas, and San Manuel.