The country's reversion of 14 geographical regions, having new 9 provinces and new congressional districts under the Duterte administration

By July 1, 2016, it will close to 13 Regions, 81 provinces, 1,489 municipalities, 145 Cities and 42,029 barangays.
The country has now thirteen geographical regions and 120 primary local government units would reverted by the Rodrigo Duterte presidency:to retain the presidential system:

• 1 - Northwestern Luzon
• PSGC: 01
• Island group: Luzon
• Regional center: City of San Fernando (La Union)
• Primary local government units: Ilocos Norte, Ilocos Sur, Abra, Mountain Province, Baguio City, Benguet, La Union, Dagupan City, Pangasinan
• Area: 22,161.82 km2 (10,730.19 sq mi)
• Population: 5,859,912 (64.3%)
• Density: 6,137/km2 (15570/sq mi)
• Cities: 10
• Municipalities: 166
• Barangays: 3,981
• Cong. districts: 16
• 2 - Northeastern Luzon
• PSGC: 02
• Island group: Luzon
• Regional center: Tuguegarao City
• Primary local government units: Batanes, Cagayan, Ifugao, Santiago City, Isabela, Kalinga, Apayao, Nueva Vizcaya, Quirino
• Area: 38,501.64 km2 (14,865.56 sq mi)
• Population: 3,734,490 (95.6%)
• Density: 271/km2 (507/sq mi)
• Cities: 5
• Municipalities: 114
• Barangays: 2,771
• Cong. districts: 13
• 3 - Central Luzon
• PSGC: 3
• Island Group: Luzon
• Regional Center: San Fernando, Pampanga
• Primary local government units: Aurora, Bataan, Bulacan, Nueva Ecija, Angeles City, Pampanga, Tarlac, Olongapo City, Zambales
• Area: 22,014.63 km2 (8,499.90 sq mi)
• Population: 10,137,737 (11.0%)
• Density: 460/km2 (1,200/sq mi)
• Cities: 14
• Municipalities: 116
• Barangays: 3,102
• Cong. districts: 20
• 4 - Southern Luzon
• PSGC: 4
• Island Group: Luzon
• Regional Center: Calamba
• Primary local government units: Batangas City, Batangas, Cavite, Laguna, Lucena City, Quezon, Antipolo City, Rizal, Marinduque, Occidental Mindoro, Oriental Mindoro, Puerto Princesa City, Palawan, Romblon
• Area: 46,494.21 km2 (17,951.51 sq mi)
• Population: 8,165,082 (8.9%)
• Registered Voters (2010): 8,208,876
• Density: 393/km2 (1020/sq mi)
• 4A - Metropolitan Manila / National Capital Region
• PSGC: 4A
• Island Group: Luzon
• Regional Center: Manila
• Primary local government units: Caloocan, Las Piñas, Makati, Malabon, Mandaluyong, Manila, Marikina, Muntinlupa, Navotas, Parañaque, Pasay, Pasig, Pateros, Quezon City, San Juan, Taguig, Valenzuela
• Area: 611.39 km2 (236.06 sq mi)
• Population: 11,855,975 (12.8%)
• Density: 19,000/km2 (49,000/sq mi)
• 5 - Southeastern Luzon
• PSGC: 05
• Island Group: Luzon
• Regional Center: Legazpi
• Primary local government units: Camarines Norte, Naga City, Camarines Sur, Albay, Catanduanes, Sorsogon, Masbate
• Area: 18,155.82 km2 (7,010.00 sq mi)
• Population: 5,420,411 (5.9%)
• Density: 300/km2 (780/sq mi)
• 6 - Western Visayas
• PSGC: 06
• Island Group: Visayas
• Regional Center: Iloilo City
• Primary local government units: Aklan, Antique, Capiz, Iloilo, Iloilo City, Guimaras, Bacolod City, Negros Occidental
• Area: 20,794.18 km2 (7,965.87 sq mi)
• Population: 6,590,618 (4.5%)
• Density: 640/km2 (1650/sq mi)
• 7 - Central Visayas
• PSGC: 07
• Island Group: Visayas
• Regional Center: Cebu City
• Primary local government units: Cebu City, Cebu, Lapu-Lapu, Mandaue, Negros Oriental, Bohol, Siquijor
• Area: 15,487.69 km2 (5,979.83 sq mi)
• Population: 6,800,180 (6.0%)
• Density: 790/km2 (2,020/sq mi)
• Provinces : 6
• Cities: 16
• Municipalities: 114
• Barangays: 3,389
• Cong. districts: 11
• 8 - Eastern Visayas
• PSGC: 08
• Island group: Visayas
• Regional center: Tacloban
• Primary local government units: Biliran, Tacloban City, Ormoc, Leyte, Southern Leyte, Northern Samar, Samar, Eastern Samar
• Area: 23,251.10 km2 (8,977.30 sq mi)
• Population: 4,101,322 (4.4%)
• Density: 180/km2 (470/sq mi)
• Provinces: 4
• Cities: 16
• Municipalities: 116
• Barangays: 3,003
• Cong. districts: 14
• 9 - Western Mindanao
• PSGC: 09
• Island group: Mindanao
• Regional center: Pagadian
• Primary local government units: Zamboanga del Norte, Zamboanga del Sur, Zamboanga Sibugay, Zamboanga City, Isabela City, Basilan, Sulu, Tawi-Tawi
• Area: 20047.47 km2 (7,740.37 sq mi)
• Population: 4,394,336 (3.7%)
• Density: 1,550/km2 (2,060/sq mi)
• Cities: 5
• Municipalities: 67
• Barangay: 2,022
• 10 - Northern Mindanao
• PSGC: 10
• Island group: Mindanao
• Regional center: Cagayan de Oro
• Primary local government units: Misamis Occidental, Lanao del Norte, Camiguin, Cagayan de Oro, Misamis Oriental, Bukidnon
• Area: 20047.47 km2 (7,740.37 sq mi)
• Population: 3,366,585 (4.7%)
• Density: 1,550/km2 (2,060/sq mi)
• Cities: 9
• Municipalities: 125
• Barangay: 2,727
• 11 - Southeastern Mindanao
• PSGC: 11
• Island group: Mindanao
• Regional center: Davao City
• Primary local government units: Davao del Norte, Compostela Valley, Davao City, Davao del Sur, Davao Occidental, Davao Oriental
• Area: 20,357.42 km2 (7,860.04 sq mi)
• Population: 4,468,563 (4.8%)
• Density: 220/km2 (570/sq mi)
• Cities: 6
• Municipalities: 65
• Barangay: 1,162
• 12 - Central Mindanao
• PSGC: 12
• Island group: Mindanao
• Regional center: Koronadal
• Primary local government units: Cotabato City, Cotabato, Lanao del Sur, Maguindanao, General Santos, South Cotabato, Sarangani, Sultan Kudarat
• Area: 22,513.30 km2 (8,692.43 sq mi)
• Population: 5,987,549 (4.8%)
• Density: 386/km2 (1,000/sq mi)
• Cities: 5
• Municipalities: 120
• Barangay: 2,862
• 13 - Northeastern Mindanao
• PSGC: 13
• Island group: Mindanao
• Regional center: Butuan
• Primary local government units: Butuan City, Agusan del Norte, Agusan del Sur, Dinagat Islands, Surigao del Norte, Surigao del Sur
• Area: 21,478.35 km2 (8,292.84 sq mi)
• Population: 2,429,224
• Density: 110/km2 (290/sq mi)
• Cities: 6
• Municipalities: 70
• Barangays: 1,310

Existing primary local government units
As of September 2015, there were 81 provinces, 33 highly urbanized cities, 5 independent component cities, and one independent municipality. All 120 primary LGUs are under direct administrative supervision of the President of the Philippines.

1. Caloocan City
2. Las Piñas City
3. Makati City
4. Malabon City
5. Mandaluyong City
6. City of Manila
7. Marikina City
8. Muntinlupa City
9. Navotas City
10. Parañaque City
11. Pasay City
12. Pasig City
13. Pateros
14. Quezon City
15. San Juan del Monte
16. Taguig City
17. Valenzuela City
18. Ilocos Norte
19. Ilocos Sur
20. Abra
21. La Union
22. Baguio City
23. Benguet
24. Dagupan City
25. Pangasinan
26. Santiago City
27. Isabela
28. Apayao
29. Cagayan
30. Kalinga
31. Batanes
32. Quirino
33. Nueva Vizcaya
34. Aurora
35. Bataan
36. Bulacan
37. Nueva Ecija
38. Angeles City
39. Pampanga
40. Tarlac
41. Olongapo City
42. Zambales
43. Rizal
44. Cavite
45. Laguna
46. Batangas
47. Lucena City
48. Quezon
49. Marinduque
50. Occidental Mindoro
51. Oriental Mindoro
52. Puerto Princesa City
53. Palawan
54. Romblon
55. Camarines Norte
56. Naga City
57. Camarines Sur
58. Albay
59. Catanduanes
60. Sorsogon
61. Masbate
62. Samar
63. Antique
64. Capiz
65. Iloilo City
66. Iloilo
67. Guimaras
68. Aklan
69. Bacolod City
70. Negros Occidental
71. Cebu
72. Cebu City
73. Lapu-Lapu City
74. Mandaue City
75. Negros Oriental
76. Bohol
77. Siquijor
78. Biliran
79. Tacloban City
80. Ormoc City
81. Leyte
82. Southern Leyte
83. Northern Samar
84. Samar
85. Eastern Samar
86. Zamboanga del Norte
87. Zamboanga del Sur
88. Zamboanga Sibugay
89. Zamboanga City
90. Isabela City
91. Basilan
92. Sulu
93. Tawi-Tawi
94. Misamis Occidental
95. Camiguin
96. Cagayan de Oro City
97. Misamis Oriental
98. Iligan City
99. Lanao del Norte
100. Bukidnon
101. Davao del Norte
102. Compostela Valley
103. Davao City
104. Davao del Sur
105. Davao Occidental
106. Davao Oriental
107. Cotabato City
108. North Cotabato
109. Lanao del Sur
110. Maguindanao
111. General Santos
112. South Cotabato
113. Sarangani
114. Sultan Kudarat
115. Butuan City
116. Agusan del Norte
117. Agusan del Sur
118. Dinagat Islands
119. Surigao del Norte
120. Surigao del Sur

plus nine (9) new provinces by the year 2019:

1. Camarines Oriental (from the fourth congressional district of Camarines Sur)
2. Nueva Camarines (from the fifth congressional district of Camarines Sur)
3. Negros del Norte (from the first, second and third congressional districts of Negros Occidental)
4. Western Leyte (from the fourth congressional district of Leyte)
5. Northwestern Samar (from the first congressional district of Western Samar)
6. Liloy (from the third congressional district of Zamboanga del Norte)
7. Shariff Kabunsuan (from the first congressional district of Maguindanao)
8. Maranaw (from the first congressional district of Lanao del Sur)
9. Lanao del Sur (from the second congressional district of Lanao del Sur)

New congressional districts under the next congress (18th Congress of the Philippines, 2019-2022) during the mid-term of Duterte:

• Cagayan –3rd Current: 1 Proposed: 2  Note: Separation of Tuguegarao City to become a lone district.
• Isabela–1st Current: 1 Proposed: 2  Note: Separation of Ilagan City to become a lone district.
• Isabela–3rd Current: 1 Proposed: 2  Note: Separation of Cauayan City to become a lone district.
• Isabela–4th Current: 1 Proposed: 2  Note: Separation of Santiago City to become a lone district.
• Pangasinan–4th Current: 1 Propose:d 2 Note: Separation of Dagupan City to become a lone district.
• Nueva Ecija–3rd Current: 1 Propose:d 2 Note: Separation of Cabantuan City to become a lone district.
• Pampanga–1st Current: 1 Proposed: 2 Note: Separation of Angeles to become a lone district.
• Tarlac–2nd Current: 1 Proposed: 3 Note: Separation of Tarlac City to become a lone district.
• Bataan–2nd Current: 1 Proposed: 2 Note: Separation of Balanga to become a lone district.
• Bulacan–1st Current: 1 Proposed: 2 Note: Separation of Malolos to become a lone district.
• City of San Jose Del Monte, Bulacan - San Jose del Monte to be split into two districts, abolishing the lone district:
• First District: Ciudad Real, Dulong Bayan, Francisco Homes-Guijo, Francisco Homes-Mulawin, Francisco Homes-Narra, Francisco Homes-Yakal, Gaya-Gaya, Graceville, Gumaoc - Central, Gumaoc - East, Gumaoc - West, Kaybanban, Kaypian, Maharlika, Muzon, Paradise III, Poblacion, Poblacion I, San Isidro, San Manuel, San Roque, Sto. Cristo, Tungkong Mangga
• Second District: Minuyan I, Minuyan II, Minuyan III, Minuyan IV, Minuyan V, Bagong Buhay I, Bagong Buhay II, Bagong Buhay III, San Martin I, San Martin II, San Martin III, San Martin IV, Sta. Cruz I, Sta. Cruz II, Santa Cruz III, Santa Cruz IV, Santa Cruz V, Fatima I, Fatima II, Fatima III, Fatima IV, Fatima V, San Pedro, Citrus, San Rafael I, San Rafael II, San Rafael III, San Rafael IV, San Rafael V, Assumption, Lawang Pare, Santo Niño I, Sto. Niño II, St. Martin de Porres, Sapang Palay Proper, Minuyan Proper
• San Juan - Current: 1 Proposed 2 Note: San Juan to be split into two districts:
• First District - Balong Bato, Batis, Corazon de Jesus, Ermitaño, Pasadena, Pedro Cruz, Progreso, Rivera, Salapan, San Perfecto
• Second District - Addition Hills, Greenhills, Isabelita, Kabayanan, Little Baguio, Maytunas, Onse, St. Joseph, Sta. Lucia, Tibagan, West Crame
• Mandaluyong City - Current: 1 Proposed 2 Note: Mandaluyong to be split into two districts:
• First District - Addition Hills, Bagong Silang, Burol, Daang Bakal, Hagdan Bato Itaas, Hagdan Bato Libis, Harapin Ang Bukas, Highway Hills, Mauway, New Zañiga, Pag-Asa, Pleasant Hills, Poblacion, Wack-Wack Greenhills
• Second District - Barangka Drive, Barangka Ibaba, Barangka Ilaya, Barangka Itaas, Buayang Bato, Hulo, Mabini-J. Rizal, Malamig, Namayan, Old Zañiga, Plainview, San José, Vergara
• Pasig City - Current: 1 Proposed 2 Note: Pasig to be split into two districts:
• First District - Bagong Ilog, Bagong Katipunan, Bambang, Buting, Caniogan, Kalawaan, Kapasigan, Kapitolyo, Malinao, Oranbo, Palatiw, Pineda, Sagád, San Antonio, San Joaquín, San José, San Nicolas, Santa Cruz, Santa Rosa, Santo Tomás, Sumilang, Ugong
• Second District - Dela Paz, Manggahan, Maybunga, Pinagbuhatan, Rosario, San Miguel, Santa Lucia, Santolan
• Las Pinas - Current: 1 Proposed 2 Note: Las Pinas  to be split into two districts:
• First District - 
• Second District
• Bacoor City - Current: 1 Proposed 2 Note: Bacoor to be split into two districts:
• First District - Alima, Aniban I, Aniban II, Aniban III, Aniban IV, Aniban V, Banalo, Camposanto, Daang-Bukid, Digman, Dulong-Bayan, Kaingin, Habay I, Habay II, Ligas I, Ligas II, Ligas III, Mabolo I, Mabolo II, Mabolo III, Maliksi I, Maliksi II, Maliksi III, Niog I, Niog II, Niog III, Panapaan I/P.F. Espirtu I, Panapaan II/P.F. Espiritu II, Panapaan III/P.F. Espiritu III, Panapaan IV/P.F. Espiritu IV, Panapaan V/P.F. Espiritu V, Panapaan VI/P.F. Espiritu VI, Panapaan VII/P.F. Espiritu VII, Panapaan VIII/P.F. Espiritu VIII, Real I, Real II, Salinas I, Salinas II, Salinas III, Salinas IV, San Nicolas I, San Nicolas II, San Nicolas III, Sineguelasan, Tabing-Dagat (Town Proper), Talaba I, Talaba II, Talaba III, Talaba IV, Talaba V, Talaba VI, Talaba VII, Zapote I, Zapote II, Zapote III, Zapote IV, Zapote V/Longos
• Second District - Bayanan, Mambog I, Mambog II, Mambog III, Mambog IV, Mambog V, Molino I/Burol, Molino II, Molino III, Molino IV, Molino V/Bahayang Pag-Asa, Molino VI/Soldiers Hills IV, Molino VII/Gawaran, Queens Row Central, Queens Row East, Queens Row West
• Pateros - Proposed: 2 Note: Separation of Pateros to become a lone district, and granting it cityhood
• Lone District: Aguho, Magtanggol, Martires Del 96, Poblacion, San Pedro, San Roque, Sta. Ana, Sto. Rosario - Kanluran, Sto. Rosario - Silangan, Tabacalera
• Muntinlupa City - Muntinlupa to be split into two districts:
• First District - Bayanan, Poblacion, Putatan, Tunasan
• Second District - Alabang, Ayala Alabang, Buli, Cupang, Sucat
• Laguna–1st Current: 1 Proposed: 2 Note: Separation of San Pedro to become a lone district.
• Laguna–3rd Current: 1 Proposed: 2 Note: Separation of San Pablo to become a lone district.
• Quezon–2nd Current: 1 Proposed: 2 Note: Separation of Lucena City to become a lone district.
• Palawan–3rd Current: 1 Proposed: 2 Note: Separation of Puerto Princessa City to become a lone district.
• Both Sorsogon districts Current: 1 Proposed: 1 Note: Transfer of Juban from the 2nd to the 1st district.
• Aklan Current: 1 Proposed: 2 Note: Aklan to be split into two districts.
• Leyte–1st Current: 1 Proposed: 2 Note: Separation of Tacloban City to become a lone district.
• Samar–1st Current: 1 Proposed: 2 Note: Separation of Calbayog City to become a lone district.
• Davao del Sur–Lone Current: 1 Proposed: 2 Note: Separation of Digos City to become a lone district.
• South Cotabato–1st Current: 1 Proposed: 2 Note: Separation of General Santos City to become a lone district.
• North Cotabato–2nd Current: 1 Proposed: 2 Note: Separation of Kidapawan City to become a lone district.
• Maguindanao–1st Current: 1 Proposed: 2 Note: Separation of Cotabato City to become a lone district.

Proposed map of South Cotabato

"If Senator Manny Pacquiao will do this on the proposed creation of a separate legislative district for General Santos City and the proposed reapportioning of the 1st and 2nd district of South Cotabato."
There are currently 6 new districts that shall be contested in 2016 and 2019:

• Davao Occidental
• No seat was added as the part of the old 2nd district of Davao del Sur shall be absorbed by its lone district.
• Biñan alternatively the fifth district of Laguna
• Legislative districts of Batangas
• Batangas City district designated as its fifth district
• Lipa district designated as its sixth district
• Cebu–7th

2019:

• Malolos alternatively the fifth district of Bulacan
• General Trias alternatively the eighth district of Cavite