List of lone-district provinces

Metropolitan Manila Area

Metro Manila, one (1) - Lone District: Manila, Quezon City, cities of Caloocan, Las Piñas, Makati, Malabon, Mandaluyong, Marikina, Muntinlupa, Navotas, Parañaque, Pasay, Pasig, San Juan, San Pedro, Taguig and Valenzuela and municipalities of Obando and Pateros.

Cordillera Administrative Region

Abra, one (1)

Apayao, one (1)

Benguet, one (1)

Ifugao, one (1)

Kalinga, one (1)

Mountain Province, one (1)

Region I

Ilocos Norte, one (1) - Lone District: Batac and Laoag Cities and municipalities of Adams, Bacarra, Badoc, Bangui, Banna, Burgos, Carasi, Currimao, Dingras, Dumalneg, Marcos, Nueva Era, Pagudpud, Paoay, Pasuquin, Piddig, Pinili, San Nicolas, Sarrat, Solsona and Vintar

Ilocos Sur, one (1) - Lone District: Cities of Candon and Vigan and municipalities of Alilem, Banayoyo, Bantay, Burgos, Cabugao, Caoayan, Cervantes, Galimuyod, Gregorio del Pilar, Lidlidda, Magsingal, Nagbukel, Narvacan, Quirino, Salcedo, San Emilio, San Esteban, San Ildefonso, San Juan, San Vicente, Santa, Santa Catalina, Santa Cruz, Santa Lucia, Santa Maria, Santiago, Santo Domingo, Sigay, Sinait, Sugpon, Suyo and Tagudin.

La Union, one (1) - Lone District: City of San Fernando and municipalities of Agoo, Aringay, Bacnotan, Bagulin, Balaoan, Bangar, Bauang, Burgos, Caba, Luna, Naguilian, Pugo, Rosario, San Gabriel, San Juan, Santo Tomas, Santol, Sudipen and Tubao.

Pangasinan, one (1) - Lone District: Cities of Dagupan, Alaminos, San Carlos and Urdaneta and municipalities of Agno, Aguilar, Alcala, Anda, Asingan, Balungao, Bani, Basista, Bautista, Bayambang, Binalonan, Binmaley, Bolinao, Bugallon, Burgos, Calasiao, Dasol, Infanta, Labrador, Laoac, Lingayen, Mabini, Malasiqui, Manaoag, Mangaldan, Mangatarem, Mapandan, Natividad, Pozorrubio, Rosales, San Fabian, San Jacinto, San Manuel, San Nicolas, San Quintin, Santa Barbara, Santa Maria, Santo Tomas, Sison, Sual, Tayug, Umingan, Urbiztondo and Villasis

Region II

Batanes, one (1) - Lone District: Municipalities of Basco, Itbayat, Ivana, Mahatao, Sabtang and Uyugan.

Cagayan, one (1) - Lone District: Tuguegarao City and municipalities of Abulug, Alcala, Allacapan, Amulung, Aparri, Baggao, Ballesteros, Buguey, Calayan, Camalaniugan, Claveria, Enrile, Gattaran, Gonzaga, Iguig, Lal-lo, Lasam, Pamplona, Peñablanca, Piat, Rizal, Sanchez-Mira, Santa Ana, Santa Praxedes, Santa Teresita, Santo Niño (Faire), Solana, Tuao, Rosario, Ninoy Aquino and Amulung West.

Isabela, one (1) - 

Nueva Vizcaya, one (1)

Quirino, one (1)

Western Isabela, one (1) - Lone District: Municipalities of Aurora, Benito Soliven, Burgos, Gamu, Mallig, Naguilian, Quezon, Quirino, Roxas, San Manuel and San Mariano.