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Home › Regions & the Bangsamoro › Complete List of Philippine Administrative Divisions (18 Regions, 82 Provinces, the 17 LGUs of NCR, HUCs/ICCs)

Complete List of Philippine Administrative Divisions (18 Regions, 82 Provinces, the 17 LGUs of NCR, HUCs/ICCs)

As of 2026-09-15 · Updated 2026-09-15 · Section: Regions & the Bangsamoro · 日本語版


0. Quick summary

Level Count Reference date / source
Region 18 After the creation of NIR in 2024. PSA/PSGC
Province 82 PSGC. The framework in place since 1976
City 149 (33 HUC / 5 ICC / 111 component cities) 注 Primary source not reached (as of 2026-08-26). The figures are as of the PSGC of 30 June 2024, but psa.gov.ph returns 403 and the original LGU-count table could not be reached
Municipality 1,493 Same as above
Barangay 42,010 The figure corresponding to PSA's published "First Quarter 2026 PSGC Updates" (2026-04-13). 注The figure itself could not be traced to a primary source (as of 2026-08-26) — psa.gov.ph returns 403. Moreover, PSA already published the "Second Quarter 2026 PSGC Updates" (as of 2026-06-30) on 2026-07-13, so the Q1 edition is no longer the latest
National population 112,729,484 2024 census (POPCEN 2024, reference date 1 July 2024), PSA / citypopulation.de

注 The most important caveat for this document: as of August 2026 the official PSA sites (psa.gov.ph / psada.psa.gov.ph) block automated access via automated-access screening, and the original PSGC files (XLSX) could not be reached mechanically. The figures here were taken from secondary outlets whose primary source is PSA (citypopulation.de, PhilAtlas) and from the texts of the laws themselves (LawPhil), and were adopted only after cross-checking through multiple routes. The PSGC code columns in particular may reflect a different edition, so verification against the PSA originals is recommended before any operational use. (Source-hygiene pass, 2026-08-26) This body of material is built on a primary-source-first rule and does not cite Wikipedia. In the sections below, entries that previously rested on Wikipedia were either ① replaced with a primary source (statutory text, government announcement, major news reporting), or ② where none could be reached, kept with the figure intact but rewritten as "注 primary source not reached (as of 2026-08-26)." Because psa.gov.ph / psada.psa.gov.ph / rsso*.psa.gov.ph and foi.gov.ph all returned 403, most PSA-derived statistics, land areas and LGU counts fall under ②.


1. Terms and the hierarchy — the points you get wrong if you don't know them

Term (JP) Original What it actually is 注
Region Region Merely an administrative unit for statistics and field offices; it has no juridical personality, no elected governor and no elected assembly 注 It is not a tier of local government above the province. The sole exception is BARMM (which has an autonomous government)
Province Province A local government unit with a Governor and a provincial board (Sangguniang Panlalawigan) —
Highly urbanized city Highly Urbanized City (HUC) Independent of the province. Its residents do not vote in provincial elections 注 Because it is geographically inside a province, it is often folded into the province's figures in statistics
Independent component city Independent Component City (ICC) A city whose charter bars its residents from voting in provincial elections. Independent of the province 注 HUC and ICC are separate categories. They are frequently confused
Component city Component City (CC) Part of the province. Residents vote in provincial elections —
Municipality Municipality Part of the province —
Barangay Barangay The smallest unit of local government —

The legal basis for HUC/ICC is the Local Government Code of 1991 (Republic Act No. 7160). The requirements for an HUC are "a population of at least 200,000 as certified by the PSA (formerly NSO)" and "the latest annual income of at least ₱50 million (in 1991 constant prices)" = Section 452(a) of RA 7160 (amendment status checked 2026-08-26. The source was switched from the English Wikipedia article "Cities of the Philippines" to the text of RA 7160 as carried on LawPhil. 注What RA 9009 (2001) raised was Section 450 — the ₱100 million annual income needed for promotion to a "component city" — not Section 452 governing HUCs. Do not conflate the two). Furthermore, RA 11683 (approved 10 April 2022) again amended that same "Section 450 of RA 7160," adding a route by which a municipality with locally sourced income of at least ₱400 million a year (in 2012 constant prices) for two consecutive years is exempted from the 150,000-population and 100 km² requirements (the ₱400 million threshold rises by 5% every three years starting three years after effectivity). 注The official title of RA 11683 is "An Act Amending Section 450 of Republic Act No. 7160 … as Amended by Republic Act No. 9009," so what it amends is "Section 450 of RA 7160." Describing it as "a law that amended RA 9009" is inaccurate (amendment status checked 2026-08-26. Source: the original title in LawPhil ra_11683_2022.html). No amendment to Section 452 (HUC) could be confirmed as of August 2026.


2. The 18 regions (overview table)

Sources: population is from the 2024 census (POPCEN 2024 / PSA. The national figure of 112,729,484 is the definitive figure officially proclaimed by Proclamation No. 973 (2025-07-11)). 注Regional population and land area could not be traced to a primary source (as of 2026-08-26) — the PSA originals return 403. Area in km².

# Region Abbreviation / number PSGC no. Regional center 2024 population Area (km²) Provinces Island group
1 Ilocos Region Region I 01 San Fernando, La Union 5,342,453 13,012.60 4 Luzon
2 Cagayan Valley Region II 02 Tuguegarao 3,777,608 28,228.83 5 Luzon
3 Central Luzon Region III 03 San Fernando, Pampanga 12,989,074 22,014.63 7 Luzon
4 CALABARZON Region IV-A 04 Calamba 16,933,234 16,873.31 5 Luzon
5 MIMAROPA Region (Southwestern Tagalog Region) MIMAROPA (formerly IV-B) 17 Calapan 3,245,446 29,620.90 5 Luzon
6 Bicol Region Region V 05 Legazpi 6,064,426 18,155.82 6 Luzon
7 Western Visayas Region VI 06 Iloilo City 4,861,911 12,750.63 5 Visayas
8 Negros Island Region NIR 18 Bacolod / Dumaguete (two poles) 4,904,944 13,525.56 3 Visayas
9 Central Visayas Region VII 07 Cebu City 6,640,875 10,114.52 2 Visayas
10 Eastern Visayas Region VIII 08 Tacloban 4,625,929 23,251.10 6 Visayas
11 Zamboanga Peninsula Region IX 09 Pagadian 5,089,934 17,056.73 4 Mindanao
12 Northern Mindanao Region X 10 Cagayan de Oro 5,178,326 20,496.02 5 Mindanao
13 Davao Region Region XI 11 Davao City 5,389,422 20,357.42 5 Mindanao
14 SOCCSKSARGEN Region XII 12 Koronadal 4,462,776 22,513.30 4 Mindanao
15 Caraga Region XIII 16 Butuan 2,865,196 21,478.35 5 Mindanao
16 National Capital Region NCR 13 Manila 14,001,751 636.00 0 Luzon
17 Cordillera Administrative Region CAR 14 Baguio 1,808,985 19,422.03 6 Luzon
18 Bangsamoro Autonomous Region in Muslim Mindanao BARMM 15 or 19 Cotabato City 4,545,486 11,935.7 5 Mindanao

注 "Region XIII = Caraga," but its PSGC number is 16. "MIMAROPA" was formerly Region IV-B, but its number is 17. The Roman numerals and the PSGC numbers do not match. 注 Region IX's population of 5,089,934 includes Sulu (1,146,097); BARMM's 4,545,486 excludes Sulu (the division in force since EO 91 of 2025). Older material has these the other way around. 注 Important (added in the 2026-08-26 verification): these two figures are not PSA's own published regional totals but values this document redistributed to match the post-EO 91 division. POPCEN 2024 has a reference date of 1 July 2024, which is before the transfer of Sulu to Region IX (EO 91 = 30 July 2025), so citypopulation.de, which derives from PSA, shows Region IX = 3,943,837 and BARMM = 5,691,583 (Sulu counted on the BARMM side) (retrieved 2026-08-26, https://www.citypopulation.de/en/philippines/admin/ ). Cross-check: 3,943,837 + 1,146,097 = 5,089,934 / 5,691,583 − 1,146,097 = 4,545,486 — both match this table. Therefore, whenever you write "Region IX's 2024 population is 5.09 million," you must note that it is a value redistributed to match the EO 91 division. If you cite the PSA published figure as-is, it is 3.94 million. Mixing the two series causes double counting and omissions in regional totals. 注 A region's area does not always equal the sum of its provinces' areas (e.g. NIR is 13,525.56 while its three provinces total 13,688.23). This is due to differences in the edition of the source and in the treatment of water bodies.


3. Complete list of provinces (82)

Legend: population = 2024 census (POPCEN 2024, reference date 1 July 2024 / PSA, via citypopulation.de). Area = 注primary source not reached (as of 2026-08-26) (km²; as a rule inclusive of the areas of HUCs/ICCs. The official figures originate with NAMRIA / PSA, which could not be reached). PSGC code = 10-digit format (psgc.cloud API / the PSA-derived dataset in the GitHub repository KuramitZui/ph-addresses-locations). The principal languages are an outline of each province's main mother tongues rather than a PSA statistic, and 注could not be traced to a primary source (as of 2026-08-26).

3-1. Region I — Ilocos Region (PSGC 01)

Province PSGC code Capital 2024 population Area (km²) Principal languages
Ilocos Norte 0102800000 Laoag 618,850 3,467.89 Ilocano
Ilocos Sur 0102900000 Vigan 709,991 2,596.00 Ilocano
La Union 0103300000 San Fernando 825,072 1,497.70 Ilocano / Pangasinan
Pangasinan 0105500000 Lingayen 3,188,540 5,451.01 Pangasinan / Ilocano

3-2. Region II — Cagayan Valley (PSGC 02)

Province PSGC code Capital 2024 population Area (km²) Principal languages
Batanes 0200900000 Basco 18,937 (smallest in the country) 219.01 Ivatan
Cagayan 0201500000 Tuguegarao 1,284,676 9,295.75 Ilocano / Ibanag / Itawis
Isabela 0203100000 Ilagan 1,733,048 12,414.93 Ilocano / Ibanag / Gaddang
Nueva Vizcaya 0205000000 Bayombong 530,106 3,975.67 Ilocano / Gaddang / Ifugao
Quirino 0205700000 Cabarroguis 210,841 2,323.47 Ilocano / Ifugao

3-3. Region III — Central Luzon (PSGC 03)

Province PSGC code Capital 2024 population Area (km²) Principal languages
Aurora 0307700000 Baler 240,824 3,147.32 Tagalog / Ilocano
Bataan 0300800000 Balanga 891,440 1,373.98 Tagalog / Kapampangan
Bulacan 0301400000 Malolos 3,876,806 2,796.10 Tagalog
Nueva Ecija 0304900000 Palayan 2,395,816 5,751.33 Tagalog / Ilocano
Pampanga 0305400000 San Fernando 3,069,898 2,062.47 Kapampangan
Tarlac 0306900000 Tarlac City 1,568,162 3,053.60 Kapampangan / Ilocano / Pangasinan
Zambales 0307100000 Iba 946,128 3,830.83 Sambal / Tagalog / Ilocano

注 Olongapo (inside Zambales) and Angeles (inside Pampanga) are both HUCs and independent of their provinces (their area and population are nonetheless folded into the table above).

3-4. Region IV-A — CALABARZON (PSGC 04)

Province PSGC code Capital 2024 population Area (km²) Principal languages
Batangas 0401000000 Batangas City 2,994,795 3,119.72 Tagalog (Batangan dialect)
Cavite 0402100000 Imus 4,573,884 (the most populous province in the country when HUCs are excluded. For its rank among all provinces, see the 注 below) 1,574.17 Tagalog / Chavacano (Cavite City)
Laguna 0403400000 Santa Cruz 3,687,345 1,917.85 Tagalog
Quezon 0405600000 Lucena 2,260,669 9,069.60 Tagalog
Rizal 0405800000 Antipolo 3,416,541 1,191.94 Tagalog

注 Correction to the population ranking (revised in the 2026-08-26 verification): the earlier text described Cavite as "the most populous province in the country" and Cebu as "second among provinces," but within the same table 4,573,884 < 5,228,149, which was self-contradictory. (Source replaced and the wording corrected again in the 2026-08-26 source-hygiene pass): PSA's own provincial totals exclude HUCs. PSA's "Highlights of the Region VII (Central Visayas) Population 2024" (published 2025-07-17) states that "Cebu has the bigger population in 2024 with 3.40 million" and lists Cebu City (965 thousand), Lapu-Lapu City (498 thousand) and Mandaue City (364 thousand) separately as HUCs. Accordingly, on the PSA basis the "most populous province" is Cavite, and 5,228,149 is the total of "Cebu province + its three HUCs." Sources: SunStar Cebu, "Central Visayas 4th most populous in Philippines" (reporting the PSA release) / citypopulation.de. 注The PSA original returned 403 and was not reached. The correct way to distinguish the two is as follows.

Way of counting 1st 2nd Basis
The geographic province as a whole (including HUCs) Cebu 5,228,149 Cavite 4,573,884 citypopulation.de (PSA-derived), retrieved 2026-08-26. 注PSA original not reached
Only the residents under provincial jurisdiction (excluding HUCs) Cavite 4,573,884 (Cavite has no HUC) Cebu approx. 3,400,522 Calculated by this document (5,228,149 − Cebu City 965,332 − Lapu-Lapu City 497,813 − Mandaue City 364,482) = not a definitive figure

Whenever you write "the most populous province in the country," you must state whether HUCs are included. Superlatives without a stated denominator are not used in this body of material.

注 By law the capital of Cavite is Imus (RA 10161 of 2012), but the provincial capitol building stands in Trece Martires, and sources differ in what they print. 注 Lucena, the capital of Quezon, is an HUC and independent of the province, yet it remains the provincial capital. Likewise Iloilo City (HUC) is the capital of Iloilo, and Bacolod is the capital of Negros Occidental.

3-5. MIMAROPA Region (PSGC 17)

Province PSGC code Capital 2024 population Area (km²) Principal languages
Marinduque 1704000000 Boac 226,522 952.58 Tagalog
Occidental Mindoro 1705100000 Mamburao 511,417 5,865.71 Tagalog
Oriental Mindoro 1705200000 Calapan 919,504 4,238.38 Tagalog
Palawan 1705300000 Puerto Princesa 1,285,179 17,030.75 Cuyonon / Tagalog / Palawano
Romblon 1705900000 Romblon 302,824 1,533.45 Romblomanon / Onhan / Asi

注 Two series circulate for Palawan's area: "17,030.75 km² (including the 2,381.02 km² of the HUC of Puerto Princesa)" and "14,649.73 km² (excluding Puerto Princesa)." Always check which definition is in use (PhilAtlas gives the exclusive figure; the inclusive figure is 注primary source not reached = as of 2026-08-26).

3-6. Region V — Bicol Region (PSGC 05)

Province PSGC code Capital 2024 population Area (km²) Principal languages
Albay 0500500000 Legazpi 1,379,398 2,575.77 Central Bikol
Camarines Norte 0501600000 Daet 604,666 2,320.07 Central Bikol / Tagalog
Camarines Sur 0501700000 Pili 2,063,314 5,497.03 Central Bikol
Catanduanes 0502000000 Virac 261,169 1,492.16 Bikol (Virac dialect)
Masbate 0504100000 Masbate City 910,813 4,151.78 Masbatenyo / Cebuano / Hiligaynon
Sorsogon 0506200000 Sorsogon City 845,066 2,119.01 Bikol (Sorsoganon) / Waray

注 Naga, inside Camarines Sur, is an ICC and independent of the province (its population is nevertheless included in the table above).

3-7. Region VI — Western Visayas (PSGC 06) reduced to five provinces when Negros Occidental left in 2024

Province PSGC code Capital 2024 population Area (km²) Principal languages
Aklan 0600400000 Kalibo 634,422 1,821.42 Aklanon
Antique 0600600000 San Jose de Buenavista 643,173 2,729.17 Kinaray-a
Capiz 0601900000 Roxas City 835,098 2,594.64 Hiligaynon / Capiznon
Guimaras 0607900000 Jordan 192,874 604.57 Hiligaynon
Iloilo 0603000000 Iloilo City 2,556,344 5,079.17 Hiligaynon / Kinaray-a

3-8. Negros Island Region (NIR, PSGC 18) — created in 2024

Province PSGC code (former) Capital 2024 population Area (km²) Principal languages
Negros Occidental formerly 0604500000 (formerly Region VI) Bacolod 3,305,264 7,965.21 Hiligaynon / Cebuano
Negros Oriental formerly 0704600000 (formerly Region VII) Dumaguete 1,492,038 5,385.53 Cebuano / Hiligaynon
Siquijor formerly 0706100000 (formerly Region VII) Siquijor 107,642 337.49 Cebuano

NIR is covered in detail in §7. 注 For the new PSGC codes of the three NIR provinces, see §8 (most machine-readable datasets have not been updated).

3-9. Region VII — Central Visayas (PSGC 07) reduced to two provinces in 2024

Province PSGC code Capital 2024 population Area (km²) Principal languages
Bohol 0701200000 Tagbilaran 1,412,726 4,820.95 Cebuano (Boholano dialect)
Cebu 0702200000 Cebu City 5,228,149 (the most populous province in the country under the counting that includes its three HUCs. See the 注 in §3-4) 5,342.00 Cebuano

注 Central Visayas lost Negros Oriental and Siquijor when NIR was created in 2024, and now has only two provinces. Any statement that "Region VII has four provinces" predates 2024 and is out of date.

3-10. Region VIII — Eastern Visayas (PSGC 08)

Province PSGC code Capital 2024 population Area (km²) Principal languages
Biliran 0807800000 Naval 184,095 536.01 Waray / Cebuano
Eastern Samar 0802600000 Borongan 472,683 4,660.47 Waray
Leyte 0803700000 Tacloban 2,082,811 6,515.05 Waray / Cebuano
Northern Samar 0804800000 Catarman 645,789 3,692.93 Waray
Samar (Western Samar) 0806000000 Catbalogan 806,179 6,048.03 Waray
Southern Leyte 0806400000 Maasin 434,372 1,798.61 Cebuano / Waray

注 "Samar" as a province name means Western Samar, but as an island name it means Samar Island (which spans three provinces). Tacloban (HUC) and Ormoc (ICC), both inside Leyte, are independent of the province.

3-11. Region IX — Zamboanga Peninsula (PSGC 09) four provinces since Sulu was transferred in 2025

Province PSGC code (current) Capital 2024 population Area (km²) Principal languages
Zamboanga del Norte 0907200000 Dipolog 1,067,067 7,301.00 Cebuano / Subanen
Zamboanga del Sur 0907300000 Pagadian 2,063,975 5,914.16 Cebuano / Chavacano / Subanen
Zamboanga Sibugay 0908300000 Ipil 661,498 3,607.75 Cebuano / Subanen
Sulu formerly 1906600000 (formerly BARMM) Jolo 1,146,097 1,600.40 Tausug

In addition, the City of Isabela (geographically within Basilan but under the jurisdiction of Region IX; 2024 population 151,297) exists as a unit attached directly to the region. Cross-check: 1,067,067 + 2,063,975 + 661,498 + 1,146,097 + 151,297 = 5,089,934 (matches the Region IX total).

3-12. Region X — Northern Mindanao (PSGC 10)

Province PSGC code Capital 2024 population Area (km²) Principal languages
Bukidnon 1001300000 Malaybalay 1,601,902 10,498.59 Cebuano / Binukid
Camiguin 1001800000 Mambajao 94,892 237.95 Cebuano / Kinamigin
Lanao del Norte 1003500000 Tubod 1,129,857 4,159.94 Cebuano / Maranao
Misamis Occidental 1004200000 Oroquieta 621,993 2,055.22 Cebuano / Subanen
Misamis Oriental 1004300000 Cagayan de Oro 1,729,682 3,544.32 Cebuano

注 Iligan (inside Lanao del Norte) and Cagayan de Oro (inside Misamis Oriental) are both HUCs. Both are independent of their provinces, and Cagayan de Oro is at once the provincial capital and the regional center.

3-13. Region XI — Davao Region (PSGC 11)

Province PSGC code Capital 2024 population Area (km²) Principal languages
Davao de Oro (formerly Compostela Valley) 1108200000 Nabunturan 783,775 4,479.77 Cebuano
Davao del Norte 1102300000 Tagum 1,143,931 3,426.97 Cebuano
Davao del Sur 1102400000 Digos 2,554,076 4,607.59 Cebuano
Davao Occidental 1108600000 Malita 317,598 2,163.45 Cebuano / Blaan / Sangir
Davao Oriental 1102500000 Mati 590,042 5,679.64 Cebuano / Mandaya

注 Davao de Oro was renamed from Compostela Valley in 2019 (RA 11297). Older maps and databases still carry the former name. 注 Davao City (HUC, area 2,443.61 km²) lies geographically within Davao del Sur, and is folded into that province's population and area above.

3-14. Region XII — SOCCSKSARGEN (PSGC 12)

Province PSGC code Capital 2024 population Area (km²) Principal languages
Cotabato (North Cotabato) 1204700000 Kidapawan 1,286,142 9,008.90 Cebuano / Hiligaynon / Maguindanaon
Sarangani 1208000000 Alabel 580,915 3,601.25 Blaan / Cebuano / Hiligaynon
South Cotabato 1206300000 Koronadal 1,732,068 4,428.81 Hiligaynon / Cebuano / Blaan
Sultan Kudarat 1206500000 Isulan 863,651 5,298.34 Hiligaynon / Maguindanaon

注 The province of Cotabato (capital Kidapawan, Region XII) and Cotabato City (an ICC belonging to BARMM) are entirely different entities. They are confused extremely often. 注 General Santos, inside South Cotabato, is an HUC (independent of the province).

3-15. Region XIII — Caraga (PSGC 16)

Province PSGC code Capital 2024 population Area (km²) Principal languages
Agusan del Norte 1600200000 Cabadbaran 789,630 3,546.86 Cebuano / Butuanon
Agusan del Sur 1600300000 Prosperidad 740,531 9,989.52 Cebuano / Manobo
Dinagat Islands 1608500000 San Jose 120,533 1,036.34 Cebuano / Surigaonon
Surigao del Norte 1606700000 Surigao City 565,644 1,972.93 Surigaonon / Cebuano
Surigao del Sur 1606800000 Tandag 648,858 4,932.70 Surigaonon / Cebuano

注 Butuan (HUC), inside Agusan del Norte, is not the provincial capital (that is Cabadbaran) but is the regional center.

3-16. Cordillera Administrative Region (CAR, PSGC 14)

Province PSGC code Capital 2024 population Area (km²) Principal languages
Abra 1400100000 Bangued 246,948 4,165.25 Ilocano / Itneg
Apayao 1408100000 Kabugao 126,587 4,413.35 Ilocano / Isnag
Benguet 1401100000 La Trinidad 841,616 2,826.59 Ilocano / Kankanaey / Ibaloi
Ifugao 1402700000 Lagawe 208,668 2,628.21 Ifugao / Ilocano
Kalinga 1403200000 Tabuk 235,391 3,231.25 Kalinga / Ilocano
Mountain Province 1404400000 Bontoc 149,775 2,157.38 Bontoc / Kankanaey / Ilocano

注 Baguio, the regional center of CAR, is an HUC and independent of Benguet (whose capital is La Trinidad).

3-17. BARMM (PSGC 15 or 19) five provinces since Sulu left in 2025

Province PSGC code Capital 2024 population Area (km²) Principal languages
Basilan 1900700000 Lamitan 541,947 (excluding Isabela City) 1,327.23 Yakan / Tausug / Chavacano
Lanao del Sur 1903600000 Marawi 1,368,137 3,872.89 (sources that call it the largest province in the country print 15,055.51) Maranao
Maguindanao del Norte 1908700000 Datu Odin Sinsuat 1,124,811 (including Cotabato City) 4,752.47 Maguindanaon
Maguindanao del Sur 1908800000 Buluan 813,243 4,973.48 Maguindanaon
Tawi-Tawi 1907000000 Bongao 482,645 1,087.40 Sama / Bajau / Tausug
(Reference) Special Geographic Area 1999… (not a province) — 214,703 824.311 Maguindanaon / Iranun

Cross-check: 541,947 + 1,368,137 + 1,124,811 + 813,243 + 482,645 + 214,703 = 4,545,486 (matches the BARMM total excluding Sulu).

注 Maguindanao was divided into Maguindanao del Norte and Maguindanao del Sur by the plebiscite of 17 September 2022 held under RA 11550 ("An Act Dividing the Province of Maguindanao into Two (2) Provinces, Namely: Maguindanao del Norte and Maguindanao del Sur," approved 27 May 2021). A single province called "Maguindanao" no longer exists (the statute's title and approval date were added in the 2026-08-26 verification. Source: the LawPhil text at lawphil.net/statutes/repacts/ra2021/ra_11550_2021.html). 注 BARMM has by far the largest gap between the regional area and the sum of its provinces' areas (added in the 2026-08-26 verification): simply adding the five provinces plus the SGA above gives 16,837.78 km² (16,013.47 excluding the SGA), whereas the regional area in §2 is 11,935.7 km² (注primary source not reached = as of 2026-08-26; the Wikipedia source previously used has been excluded) — a gap of about 4,900 km². This most likely stems from differing treatment of inland waters, the SGA and Isabela City among sources, but this study could not resolve it = unresolved. When you write "the area of BARMM," do not substitute the sum of its provinces; fix on a single authority. 注 The Special Geographic Area (SGA) is not legally a province. It is the cluster of 63 barangay exclaves inside Cotabato province that voted to join BARMM in the 2019 BOL plebiscite, and in 2024 eight municipalities were newly created there (Kadayangan, Kapalawan, Ligawasan, Malidegao, Nabalawag, Old Kaabakan, Pahamuddin, Tugunan). Because it is sometimes tabulated as province-equivalent in statistics, people frequently miswrite "BARMM has six provinces" (the correct number is five). 注 The area of Lanao del Sur differs greatly by source. Re-checked against the original PhilAtlas page on 2026-08-26, which does indeed state "The province has a land area of 15,055.51 square kilometers" (https://www.philatlas.com/mindanao/barmm/lanao-del-sur.html ). A separate series giving 3,872.89 km² also circulates (注primary source not reached = as of 2026-08-26; the Wikipedia province table previously used has been excluded). The two differ by roughly fourfold, so one of them is very likely wrong = unresolved. 注 However, the claim that "Lanao del Sur is the largest province in the country" was this document's own summary and not something PhilAtlas itself says — corrected in the 2026-08-26 verification. The PhilAtlas page contains no ranking statement. There is also a series that makes Palawan the largest province at 17,030.75 km², but 注that too is primary-source-unreached (as of 2026-08-26) (the Wikipedia source previously used has been excluded), and this body of material does not assert which province is "the largest." Even taking 15,055.51 at face value, it is still smaller than Palawan under the definition that includes Puerto Princesa City. 15,055.51 exceeds Palawan only if Palawan is measured at 14,649.73 km², excluding Puerto Princesa City. Conclusion: when writing about "the largest province by area," always state all three of ① the source, ② whether HUCs are included, and ③ the treatment of inland waters. Unconditional superlatives are not used in this body of material.

3-18. National Capital Region (NCR, PSGC 13)

NCR contains no provinces. It consists of 16 cities plus one municipality (§4).


4. The 17 cities and municipality of Metro Manila / NCR

Sources: population is from the 2024 census (POPCEN 2024 / PSA. 注The PSA original for the city-by-city breakdown was not reached = as of 2026-08-26; the Wikipedia articles on the individual cities previously used have been excluded, and the figures were cross-checked against citypopulation.de, which derives from PSA); the district groupings and district totals are from citypopulation.de (PSA-derived). The 17 LGUs sum to 14,001,751, which matches PSA's published NCR total exactly (cross-checked).

District (PSGC) LGU Type 2024 population Area (km²) Barangays
1st District, Capital District (1339) Manila (Maynila) HUC, capital 1,902,590 42.34 (see 注 below) 897
2nd District, Eastern Manila (1374) Quezon City HUC 3,084,270 (largest in the country) 171.71 142
〃 Pasig HUC 853,050 48.46 30
〃 Marikina HUC 471,323 21.52 16
〃 Mandaluyong HUC 465,902 11.26 27
〃 San Juan HUC 134,312 (smallest city by area) 5.87 21
3rd District, CAMANAVA (1375) Caloocan HUC 1,712,945 55.80 193
〃 Valenzuela HUC 725,173 47.02 33
〃 Malabon HUC 389,929 15.71 21
〃 Navotas HUC 252,878 8.94 18
4th District, Southern Manila (1376) Taguig HUC 1,308,085 47.28 38
〃 Parañaque HUC 703,245 46.57 16
〃 Las Piñas HUC 615,549 32.69 20
〃 Muntinlupa HUC 552,225 39.75 9
〃 Pasay HUC 453,186 13.97 201
〃 Makati HUC 309,770 18.17 23
〃 Pateros municipality (the only one) 67,319 1.66 (smallest municipality in the country) 10
Total 17 (16 cities + 1 municipality) — 14,001,751 636.00 (PSA regional figure) approx. 1,710

District totals (citypopulation.de, 2024): 1st District 1,902,590 / 2nd District 5,008,857 / 3rd District 3,080,925 / 4th District 4,009,379. The LGU figures in the table above sum exactly to each district total.

注 The Makati–Taguig boundary dispute: (dates corrected again in the 2026-08-26 source-hygiene pass) the correct sequence is a decision of the Supreme Court Third Division on 1 December 2021 (G.R. No. 235316, Municipality of Makati v. Municipality of Taguig), a resolution of 28 September 2022 denying the motion for reconsideration "with finality" — final and executory that same day — and a resolution of 26 June 2023 also denying leave to admit a second motion for reconsideration. The previously stated "decision April 2022 / final April 2023" could not be confirmed in any primary source and was wrong. Sources: the Supreme Court's official site, sc.judiciary.gov.ph, "SC Writes Finis to Makati City–Taguig City Land Dispute" and "SC Denies Makati's Motion for Leave to Admit Second Motion for Reconsideration…," and the Supreme Court E-Library, G.R. No. 235316. As a result, ten EMBO barangays were transferred from Makati to Taguig. Consequently Makati's barangay count fell from 33 to 23, its area from about 21.57 to 18.17 km², and its population halved from 629,616 in 2020 to 309,770 in 2024. Using Makati's pre-2020 population or area unchanged produces large errors. 注 Two series exist for Manila's area: "24.98 km²" (PhilAtlas = land area) and "42.34 km²" (a series including Manila Bay reclamation and water; 注primary source not reached = as of 2026-08-26). Always align the definitions when computing density. 注 Two figures also coexist for NCR's area: "619.54 km²" (PhilAtlas, the sum of the 17 LGUs) and "636.00 km²" (the regional figure; 注primary source not reached = as of 2026-08-26). 注 Both 188 and 193 circulate for Caloocan's barangay count (this table uses 193, the 2024 figure).


5. Complete list of the 33 highly urbanized cities (HUC)

Source: PhilAtlas, "Cities" (classification, area, 2020 census population). 2024 populations are given only where they could be confirmed (the 16 NCR cities are in §4; for the others, 注primary source not reached = as of 2026-08-26).

# City Province / region it lies in 2020 population 2024 population Area (km²)
1 Angeles Pampanga (III) 462,928 — 63.37
2 Olongapo Zambales (III) 260,317 — 185.00
3 Lucena Quezon (IV-A) 278,924 — 80.21
4 Puerto Princesa Palawan (MIMAROPA) 307,079 — 2,381.02
5 Baguio Benguet (CAR) 366,358 368,426 57.51
6 Iloilo City Iloilo (VI) 457,626 — 78.34
7 Bacolod Negros Occidental (NIR) 600,783 — 160.71
8 Cebu City Cebu (VII) 964,169 965,332 315.00
9 Lapu-Lapu Cebu (VII) 497,604 497,813 58.10
10 Mandaue Cebu (VII) 364,116 364,482 25.18
11 Tacloban Leyte (VIII) 251,881 — 201.72
12 Zamboanga City Zamboanga del Sur (IX) 977,234 — 1,414.70
13 Cagayan de Oro Misamis Oriental (X) 728,402 — 412.80
14 Iligan Lanao del Norte (X) 363,115 — 813.37
15 Davao City Davao del Sur (XI) 1,776,949 — 2,443.61
16 General Santos South Cotabato (XII) 697,315 — 492.86
17 Butuan Agusan del Norte (XIII) 372,910 385,530 816.62
18–33 The 16 cities of NCR (Manila, Quezon City, Caloocan, Taguig, Pasig, Valenzuela, Parañaque, Las Piñas, Muntinlupa, Marikina, Mandaluyong, Pasay, Malabon, Makati, Navotas, San Juan) NCR — see §4 see §4

Total = 17 cities outside NCR + 16 cities inside NCR = 33 cities. 注 Some secondary outlets say "34 highly urbanized cities," but the list based on the PSGC (as of 30 June 2024) gives 33. When stating the number, it is safest to write "33 on the PSGC basis." The substance behind the figure of 34 is that it counts, ahead of time, Naga City (Camarines Sur), which was proclaimed an HUC by Proclamation No. 1267 on 2026-05-26 — that city's ratifying plebiscite is still scheduled, for 2026-11-02 (see the note in §6 below). The reconciliation established in the 2026-08-26 verification (this connects the two accounts): the circulating framing that "there are 38 independent cities in all, every one of them either an HUC or an ICC" breaks them down as HUC 34 / ICC 4 (Cotabato, Dagupan, Ormoc, Santiago). This document's breakdown is HUC 33 / ICC 5 (those four plus Naga), and both add up to the same 38 — the sole difference is the treatment of Naga City. As a matter of legal classification, HUC 33 / ICC 5 is correct as of August 2026, before the ratifying plebiscite. 注That said, the PSGC-derived total of "38 independent cities" is itself primary-source-unreached (as of 2026-08-26) — psa.gov.ph returns 403 (the Wikipedia article previously relied on has been removed as a source). In other words the difference between the two is not "the number of cities" but the single question of whether Naga City in Camarines Sur is counted as an HUC or an ICC. Naga City (Camarines Sur) is an independent component city under its charter, and this document counts it among the ICCs. "HUC 33 / ICC 5" and "HUC 34 / ICC 4" are not in conflict on the point that there are 38 independent cities. Whichever breakdown you use, always attach the authority and the date. A deeper cause (added in the 2026-08-26 verification): "promotion" to HUC is not completed by a presidential proclamation alone; it requires ratification in a plebiscite (RA 7160). As of August 2026 there are two cities with a proclamation but without ratification.

City Proclamation Current legal classification
Naga (Camarines Sur) Proclamation No. 1267 (26 May 2026. 注signed by Executive Secretary ad interim Ralph G. Recto. Basis population 210,545) Still an ICC at present. The ratifying plebiscite will be held on 2 November 2026, together with the barangay and SK elections (COMELEC Minute Resolution No. 26-0526; 119,259 registered voters. Because it is an ICC, only voters of Naga City may take part)
Pagadian (Zamboanga del Sur, the regional center of Region IX) A presidential proclamation of 2021 (注the proclamation number 1247 and the date of 8 December 2021 are primary-source-unreached as of 2026-08-26) Still a component city (CC) at present (no plebiscite has been held)

(Sources: PIA, "PBBM proclaims Naga City as highly-urbanized city" / the official Naga City site www2.naga.gov.ph, "Naga declared highly urbanized, becomes Philippines' 34th HUC" / PNA, "Comelec OKs request to synchronize Naga plebiscite, BSKE" / Philstar, "Plebiscite needed for Naga's HUC conversion" (2026-05-31) / Inquirer, "What's next after Marcos declares Naga a highly urbanized city." Substituted for Wikipedia in the 2026-08-26 source-hygiene pass. Precedents: San Jose del Monte was proclaimed in 2020 and rejected in its 2023 plebiscite; Cabanatuan (1997) and Tarlac (2005) were likewise rejected) The count of "34 cities" very likely counts this unratified proclamation ahead of time. A proclamation is not a promotion. Before writing that a city "has been promoted to HUC," always check whether a plebiscite was held and ratified. 注 San Juan (NCR) has fewer than 200,000 people yet is an HUC. It is treated as an exception that does not meet the requirements of the 1991 Local Government Code. 注 Bacolod's region changed from Region VI to NIR when NIR was created in 2024.


6. Complete list of the 5 independent component cities (ICC)

# City Province (geographically) Region 2020 population 2024 population Area (km²)
1 Dagupan Pangasinan Region I 174,302 — 37.23
2 Santiago Isabela Region II 148,580 — 255.50
3 Naga Camarines Sur Region V 209,170 210,545 77.40
4 Ormoc Leyte Region VIII 230,998 — 613.60
5 Cotabato City Maguindanao del Norte (geographically) BARMM 325,079 — 176.00

注 Cotabato City joined BARMM in the 2019 BOL plebiscite and is now BARMM's political center (its regional center), but its legal classification as an ICC is retained. 注 There are two cities named Naga (Naga in Camarines Sur = ICC; Naga in Cebu = component city). Always give the province alongside the name. 注 Naga City (Camarines Sur) was proclaimed an HUC by Proclamation No. 1267 on 26 May 2026, but ratification by plebiscite is still pending, so its legal classification as of August 2026 remains ICC (sources: PIA, "PBBM proclaims Naga City as highly-urbanized city" / the official Naga City site www2.naga.gov.ph / PNA. The ratifying plebiscite will be held on 2026-11-02, together with the BSKE). The classification in the table above is as of August 2026 and will change to HUC 34 / ICC 4 depending on the plebiscite result. (Added in the 2026-08-26 verification) 注 Two figures coexist for Naga City's area: the 77.40 km² in the table above and 84.48 km² (注the latter is primary-source-unreached = as of 2026-08-26; the Wikipedia source previously used has been excluded). This study could not determine which is correct = both are presented (added in the 2026-08-26 verification). 注 Isabela City (Basilan) is not an ICC but a component city, and it occupies the highly unusual position of being placed under Region IX rather than under its province (Basilan, BARMM).


7. Boundary changes of 2024–2026 (the core of this document)

7-1. Creation of the Negros Island Region (NIR) — 2024

Item Content Source
Enabling law Republic Act No. 12000 (Negros Island Region Act) LawPhil (statutory text)
Approval date 11 June 2024 (the approval date in the text of the law) LawPhil
Announcement of the signing The Presidential Communications Office (PCO) announced "PBBM inks laws to establish Negros Island Region" on 13 June 2024 注two different dates circulate PCO (via Google News RSS)
Composition Negros Occidental (including Bacolod City), Negros Oriental, Siquijor Section 3 of the original text, LawPhil ra_12000_2024.html: "(a) Negros Occidental including Bacolod City; (b) Negros Oriental; and (c) Siquijor"
PSGC region number 18 注 Primary source not reached (as of 2026-08-26) (psa.gov.ph returns 403 and the PSGC original could not be reached)
Regional center No single center; offices are distributed by functional cluster. Section 4 of RA 12000 assigns the "Agriculture / Peace & Order / Governance" clusters to Negros Occidental and the "Human Development / Infrastructure / Industry & Labor" clusters to Negros Oriental, and names neither Bacolod nor Dumaguete as "the regional center" Section 4 of the original text, LawPhil ra_12000_2024.html. 注The breakdown of "16 agencies to Dumaguete, 14 to Bacolod" does not appear in the statute and is primary-source-unreached (as of 2026-08-26) — the Wikipedia source previously used has been excluded
2024 population / area 4,904,944 / 13,525.56 km² 注 Primary source not reached (as of 2026-08-26) (the PSA original returns 403)
Number of cities 19 (1 HUC = Bacolod, 18 component cities) 注 Primary source not reached (as of 2026-08-26)
Implementation status The IRR was promulgated in February 2025, and PSA's work to set up an NIR statistical office is under way. Full operation is reported to be targeted for 2027 PNA, SunStar, Daily Guardian (2025)

Historical background (注 beware the outdated claim that "NIR was created in 2015"):

Date Event
29 May 2015 The Aquino III administration created NIR by Executive Order 183 (on a presidential-order basis)
9 August 2017 The Duterte administration abolished NIR by Executive Order No. 38. Negros Occidental returned to Region VI and Negros Oriental to Region VII
June 2024 RA 12000 re-established it as a matter of statute. This time Siquijor was also transferred in, from Region VII

7-2. Sulu's departure from BARMM and transfer to Region IX — 2024–2025

Date Event Source
January–February 2019 The BOL (Bangsamoro Organic Law) ratification plebiscite. Sulu voted against by a simple majority but was incorporated into BARMM through region-wide aggregation of the returns (the plebiscite was held twice: 21 January 2019 (the former ARMM plus Isabela City and Cotabato City) and 6 February 2019) The Supreme Court's official site, sc.judiciary.gov.ph, "SC Upholds Validity of Bangsamoro Organic Law; Declares Sulu not Part of Bangsamoro Region" / the Supreme Court E-Library, text of the decision in G.R. No. 242255
9 September 2024 The Supreme Court upheld the BOL (RA 11054) itself as constitutional while holding that the inclusion of Sulu in BARMM was unconstitutional. Consolidated cases G.R. Nos. 242255 / 243246 / 243693, penned by Senior Associate Justice Leonen, unanimous (holding it contrary to Article X, Section 18 of the Constitution — only areas that vote in favor in the plebiscite become part of the autonomous region). On 26 November 2024 the En Banc denied reconsideration, making the ruling final and immediately executory The Supreme Court's official site, sc.judiciary.gov.ph, "SC Upholds Validity of Bangsamoro Organic Law; Declares Sulu not Part of Bangsamoro Region" / the Supreme Court E-Library, text of the decision in G.R. No. 242255 / PNA, "SC affirms Bangsamoro Organic Law; rules Sulu not part of BARMM" / PNA, "SC: Sulu exit from BARMM final, executory"
26 November 2024 The above ruling became final Same as above
30 July 2025 Executive Order No. 91 (signed by President Marcos) settled the placement of Sulu in Region IX (Zamboanga Peninsula) and directed the continuity of administrative services PCO / Manila Bulletin / Rappler (reported 2–4 August 2025)
August–October 2025 The transfer left the employment status of more than 5,000 BARMM personnel in limbo. As of October the DILG said integration was "proceeding smoothly" Rappler (4 August 2025), Inquirer (14 October 2025)

注 As a result, Region IX went from three provinces to four, and BARMM from six to five. 注 Sulu's 2024 population is 1,146,097. Many secondary outlets print the 2020 figure of 1,000,108 as though it were "2024." Always distinguish the two. Corroborated in the 2026-08-26 verification: the 2024 column (reference date 2024-07-01) of citypopulation.de (PSA-derived) gives Sulu as 1,146,097, matching this document (source: https://www.citypopulation.de/en/philippines/admin/ ). Several secondary outlets, by contrast, show the province as "1,000,108 in the 2024 census," and this was re-confirmed to be a mistranscription of the 2020 figure. The legal basis for Sulu's transfer to Region IX is Section 3 of Executive Order No. 91, s. 2025 (30 July 2025) (source: the original text at LawPhil eo_91_2025. Substituted for Wikipedia in the 2026-08-26 source-hygiene pass).


8. The coexistence of old and new PSGC codes 注

8-1. Difference in digit length (9-digit vs 10-digit)

Format Structure Example: Ilocos Norte Example: BARMM
Old, 9-digit region 2 + province 2 + city/municipality 2 + barangay 3 012800000 150000000
New, 10-digit region 2 + province 3 + city/municipality 2 + barangay 3 0102800000 1900000000

注 BARMM's region code is "15" in the 9-digit system and "19" in the 10-digit system. Two numbers circulate for the same region. In fact the public API at psgc.gitlab.io carries both code: 150000000 and psgc10DigitCode: 1900000000 on the same record (confirmed as of August 2026). 注 Province codes also shift position with the digit length, so naive string comparison or concatenation across 9-digit and 10-digit codes breaks the matching.

8-2. Many datasets do not reflect the creation of NIR or the transfer of Sulu

The situation actually observed as of August 2026:

Data source Number of regions NIR Sulu's affiliation PSGC of Negros Occidental
psgc.gitlab.io API 17 absent BARMM 064500000 in the old 9-digit style of 012800000 (Region VI)
psgc.cloud API 17 absent BARMM (1906600000) 0604500000 (still Region VI)
GitHub KuramitZui/ph-addresses-locations 17 absent BARMM 0604500000 (same as above)
citypopulation.de (PSA-derived) 18 present (code 18) left on the BARMM side (as displayed) 1845… (updated to Region 18)
Statutory texts (LawPhil) 18 = NIR created by RA 12000 (approved 2024-06-11) present Region IX = Section 3 of EO 91, s. 2025 (2025-07-30) — (statutes do not assign PSGC codes)

注 In short, "PSGC codes that reflect NIR" and "PSGC codes that do not" coexist in practice. - Negros Occidental: old 0604500000 (06 = Region VI) / new, in the region-18 series - Negros Oriental: old 0704600000 (07 = Region VII) / new, in the region-18 series - Siquijor: old 0706100000 (07 = Region VII). Even citypopulation.de, while classifying it under NIR, still displays a code beginning 07, and the definitive new code could not be confirmed in this study. - Sulu: still 1906600000 (19 = BARMM). Whether it has been renumbered to Region IX (09) is unconfirmed.

注 Practical handling: in system-to-system integration, always record not just "the PSGC code" but "which published PSGC edition it is based on" (e.g. Q1 2026). PSA updates the PSGC quarterly. (Updated 2026-08-26) The latest is the "Second Quarter 2026 PSGC Updates" (published 2026-07-13, as of 2026-06-30), in which the municipality of San Isidro in Davao del Norte was renamed Sawata following ratification of RA 11814 in the plebiscite of 2026-04-11. The edition before that was the "First Quarter 2026 PSGC Updates" (published 2026-04-13; 42,010 barangays). 注In both cases the original XLSX could not be reached because psa.gov.ph returns 403 (primary source not reached = as of 2026-08-26).


9. The points you get wrong if you don't know them (summary) 注

# Common error The correct understanding
1 "The Philippines has 17 regions" Since June 2024 there are 18 regions (NIR added)
2 "Region VII has four provinces" It now has only two (Bohol, Cebu)
3 "Region VI has six provinces" It now has five (Negros Occidental left)
4 "BARMM has six provinces" It now has five (Sulu left in 2025). The SGA is not a province
5 "Region IX has three provinces" It now has four (Sulu was transferred in)
6 "The province of Maguindanao" It was split into del Norte and del Sur in 2022
7 "Compostela Valley" Renamed Davao de Oro in 2019
8 "Region XIII is PSGC 13" Region XIII (Caraga) is PSGC 16. PSGC 13 is NCR
9 "MIMAROPA is Region IV-B" The number has been dropped from the official name, and its PSGC is 17
10 "Makati has 600,000 people" In 2024 it has 309,770 (the effect of the transfer of the EMBO barangays to Taguig)
11 "Sulu has a population of one million" 1,000,108 is the 2020 figure. In 2024 it is 1,146,097
12 "Cotabato province = Cotabato City" They are different entities. The province is in Region XII; the city is an ICC belonging to BARMM
13 "Provincial populations exclude HUCs" As a rule PSA's provincial totals include HUCs (e.g. Cebu's 5,228,149 includes Cebu City and the others)
14 "A region is a local government" A region has no juridical personality; it is a unit for statistics and field offices. The only exception is BARMM
15 "There is one PSGC code" Multiple editions circulate — 9-digit and 10-digit, pre- and post-NIR
16 "The most populous province is Cavite" On PSA's provincial totals including HUCs, Cebu (5,228,149) is the largest. Cavite (4,573,884) is the largest only under the counting that excludes HUCs. Always state the method of counting (added in the 2026-08-26 verification)
17 "Naga City and Pagadian are HUCs" Presidential proclamations have been issued but the plebiscites are not complete; as of August 2026 Naga is an ICC and Pagadian a component city. A proclamation is not a promotion (added in the 2026-08-26 verification)
18 "A region's area = the sum of its provinces' areas" They do not match. For BARMM in particular the regional figure of 11,935.7 against a provincial sum of 16,837.78 leaves a gap of about 4,900 km² (see §3-17)

A note on numerical consistency: simply adding the 2024 populations of the 18 regions in this document gives 112,727,776, which differs from PSA's published national figure of 112,729,484 by 1,708. This comes from edition differences between sources; when preparing material, do not assert that "the sum equals the national figure."

9-1. Results of the recalculation and cross-checking in the 2026-08-26 verification

Item verified Result
Total number of provinces (counted from all tables in §3) 82 (4+5+7+5+5+6+5+3+2+6+4+5+5+4+5+6+5) = table and text agree ✅. 注The official provincial total (PSGC) is primary-source-unreached (as of 2026-08-26)
National population 112,729,484 The definitive figure the President proclaimed "official for all purposes" in Proclamation No. 973 (11 July 2025) (under RA 10625 and EO 87, s. 2025; reference moment 12:01 a.m. on 2024-07-01). The 2024-07-01 column of citypopulation.de also agrees ✅. Sources: PCO, "PBBM declares 112.7M Philippine population count as official" / PIA, same title / Philstar (2025-07-18)
Sum of the 18 regions Re-added to 112,727,776, reproducing the difference of 1,708 from the national figure ✅ (exactly as the text states)
Each region = the sum of its provinces Confirmed to agree across all 17 series: Region I / II / III / IV-A / MIMAROPA / V / VI / NIR / VII / VIII / IX / X / XI / XII / XIII / CAR / BARMM ✅
The 17 NCR LGUs sum to 14,001,751 Agrees ✅. The district totals (1,902,590 / 5,008,857 / 3,080,925 / 4,009,379) all agree as well ✅
Region IX cross-check (5,089,934) Agrees ✅, but PSA's published regional figure is 3,943,837 (see the 注 in §2)
BARMM cross-check (4,545,486) Agrees ✅, but PSA's published regional figure is 5,691,583
Sum of the three NIR provinces' areas, 13,688.23 Agrees ✅ (and the gap from the regional figure of 13,525.56 is as the text states)
City breakdown 149 = HUC 33 + ICC 5 + component 111 Agrees ✅ (the reconciliation via "38 independent cities" was added to the 注 in §5)
Sulu 1,146,097 (2024) Confirmed on citypopulation.de ✅
Batanes 18,937 / Cavite 4,573,884 / Cebu 5,228,149 Consistency with each regional total confirmed ✅ (but note the premise that the superlatives "smallest in the country," "largest in the country" and "second in the country" apply to provinces only and exclude the cities of NCR). The re-verification of 2026-08-26 found "Cavite = largest in the country / Cebu = second" to be wrong and it has been corrected (see the 注 in §3-4). The most populous province is Cebu, HUCs included.
Sum of the areas of the 17 NCR LGUs (added in the 2026-08-26 verification) Adding the areas in the table gives 628.72 km², which matches neither the regional figure of 636.00 (注primary-source-unreached as of 2026-08-26) nor 619.54 (PhilAtlas) 注. Three series coexist for the area, so do not use the sum of the LGU figures as "the area of NCR"
Tawi-Tawi 482,645 (2024) Confirmed on citypopulation.de (PSA-derived) ✅. 注Some secondary outlets display 440,276 (the 2020 figure) — the same kind of mistranscription as with Sulu (added in the 2026-08-26 verification)
Basilan 541,947 + Isabela City 151,297 = 693,244 Agrees with the Basilan column in secondary outlets (693,244) ✅ = that column uses the counting that includes Isabela City. 注The PSA original returned 403 and was not reached

注 What is marked "agrees" above is internal consistency within this document, not agreement with the PSA originals. The PSGC-code and area columns still depend on secondary outlets, and the warning in §0 — that verification against the PSA originals is needed before any operational use — remains fully in force.


10. Sources

Type Source Use URL
Primary (statute) Republic Act No. 12000 (Negros Island Region Act) Creation, approval date and composition of NIR https://lawphil.net/statutes/repacts/ra2024/ra_12000_2024.html
Primary (Office of the President) PCO, "PBBM declares Sulu part of Zamboanga Peninsula" (3 August 2025) / Executive Order No. 91 (30 July 2025) Transfer of Sulu via Google News RSS (news.google.com)
Primary (statistics, indirect) PSA, "Philippine Standard Geographic Code (PSGC)" Divisions, codes, LGU counts https://psa.gov.ph/classification/psgc (automated access blocked as of August 2026)
Secondary citypopulation.de, "Philippines: Administrative Division" 2024 census populations by province and region (PSA-derived) https://www.citypopulation.de/en/philippines/admin/
Primary The Supreme Court's official site / Supreme Court E-Library Sulu's departure from BARMM (G.R. No. 242255, 2024-09-09); the Makati–Taguig boundary (G.R. No. 235316, decided 2021-12-01, final 2022-09-28) https://sc.judiciary.gov.ph/ / https://elibrary.judiciary.gov.ph/
Primary PCO / PIA / PNA Proclamation No. 973 (official proclamation of POPCEN 2024), Proclamation No. 1267 (Naga City HUC proclamation), cabinet appointments and oaths https://pco.gov.ph/ / https://pia.gov.ph/ / https://www.pna.gov.ph/
注 Not reached PSA (psa.gov.ph / psada.psa.gov.ph / rsso*.psa.gov.ph), the FOI portal The PSGC original XLSX, LGU-count tables, provincial areas, city populations All returned 403 as of 2026-08-26. The English Wikipedia, which had previously filled these gaps, has been removed entirely as a source under this material's primary-source-first rule
Secondary PhilAtlas, "Cities" Complete list of the 33 HUCs and 5 ICCs, areas, 2020 populations https://www.philatlas.com/cities.html
Reference (API) psgc.cloud API, psgc.gitlab.io API, GitHub KuramitZui/ph-addresses-locations PSGC codes (editions predating NIR) https://psa.gov.ph/classification/psgc/provinces and others

All 2024 populations in this document are based on POPCEN 2024 (reference date 1 July 2024, made official by presidential proclamation in July 2025; national total 112,729,484). Do not mix them with the 2020 census (109,035,343).



Verification record (2026-08-26)

The full verification record for the "four index files" that include this one (Index of Major Laws / Complete List of Administrative Divisions / Index of Persons and Organizations / Glossary, Japanese–English Comparison) is consolidated in the "Verification record (2026-08-26)" section at the end of the representative file 04_情報集積/主要法令インデックス.

Only the main results concerning this file are repeated here.

Category Content
Correction §3-17's claim that "PhilAtlas calls Lanao del Sur the largest province in the country" → PhilAtlas contains no ranking statement (the existence of the 15,055.51 figure was confirmed). The superlative has been withdrawn
Confirmed Sulu's 2024 population 1,146,097 (confirmed on citypopulation.de / PSA-derived; the 1,000,108 circulating in secondary outlets is a mistranscription of the 2020 figure)
Confirmed 82 provinces and a national population of 112,729,484, confirmed in two external outlets
Reconciled "33 + 5" and "34 + 4" for HUC/ICC agree on the point that there are 38 independent cities in total. The difference is only the classification of Naga City
Important addition Region IX 5,089,934 / BARMM 4,545,486 are not PSA published figures but values redistributed to the post-EO 91 division. The PSA-derived published figures are Region IX 3,943,837 / BARMM 5,691,583 (see the 注 in §2)
Cross-checks Internal consistency confirmed for all of: the sum of the 18 regions, each region = the sum of its provinces (17 series), the 17 NCR LGUs, and the four district groupings (§9-1)
Still unconfirmed All PSGC codes (the PSA originals cannot be retrieved automatically) / the new codes for the three NIR provinces and for Sulu / the area of Lanao del Sur (the fourfold gap between 15,055.51 and 3,872.89 is unresolved)

Second-round verification (2026-08-26, additional)

# Category Content Source
1 Correction §3-4 / §3-9's "Cavite = most populous province" and "Cebu = second among provinces" were contradicted by the figures within the same table → rewritten to distinguish Cebu as largest including HUCs and Cavite as largest excluding HUCs, with a mandatory statement of the comparison's denominator. (Added in the 2026-08-26 source-hygiene pass) Because PSA's own provincial totals exclude HUCs, the "most populous province" on the PSA basis is Cavite SunStar Cebu reporting PSA's "Highlights of the Region VII (Central Visayas) Population 2024" (published 2025-07-17) / citypopulation.de. 注The PSA original returned 403 and was not reached
2 Addition §5 / §6: promotion to HUC is not completed by a presidential proclamation alone. Naga — Proclamation 1267 (2026-05-26) — and Pagadian — a 2021 proclamation — are both unratified by plebiscite, so their current classifications remain ICC and component city. This is the substantive cause of the "HUC 33 vs 34" discrepancy. Naga City's ratifying plebiscite is on 2026-11-02 (together with the BSKE) PIA, "PBBM proclaims Naga City as highly-urbanized city" / the official Naga City site www2.naga.gov.ph / PNA, "Comelec OKs request to synchronize Naga plebiscite, BSKE" / Philstar (2026-05-31). 注Pagadian's proclamation number and date are primary-source-unreached (as of 2026-08-26)
3 Addition §3-17: the official title and approval date of RA 11550 (2021-05-27) were supplied. The plebiscite was on 2022-09-17 LawPhil ra_11550_2021
4 Addition §3-17: recorded that BARMM's regional area of 11,935.7 and the provincial sum of 16,837.78 differ by about 4,900 km² = unresolved Calculated within this document. 注The regional area of 11,935.7 is primary-source-unreached (as of 2026-08-26)
5 Addition §9-1: the 17 NCR LGUs' areas sum to 628.72 km², matching neither regional figure (636.00 / 619.54) Calculated within this document
6 Addition §6: both figures for Naga City's area — 77.40 (this table) and 84.48 — are now shown 注 Primary source not reached (as of 2026-08-26)
7 ✅ Corroborated Section 3 of EO 91 (2025-07-30): "The Province of Sulu is hereby declared a part of Region IX (Zamboanga Peninsula)." confirmed in the original text. Sulu's membership in Region IX is settled LawPhil eo_91_2025
8 注 Corroboration withdrawn 42,010 barangays / 149 cities / Pateros at 1.66 km² as the smallest municipality in the country were found in the 2026-08-26 source-hygiene pass to have no corroboration outside Wikipedia. The figures are retained but treated as primary-source-unreached. The 2024 populations of the NCR cities (Makati 309,770, Taguig 1,308,085, QC 3,084,270 and others) are maintained from citypopulation.de PSA's published "First Quarter 2026 PSGC Updates" (2026-04-13) and "Second Quarter 2026 PSGC Updates" (2026-07-13) = only the fact of publication is confirmed; the figures themselves are 注primary-source-unreached (as of 2026-08-26) / populations from citypopulation.de
9 ✅ Corroborated Tawi-Tawi 482,645 (2024). 注The 440,276 in secondary outlets is a mistranscription of the 2020 figure (the same pattern as Sulu) citypopulation.de
10 Correction Makati = 18.17 km², 23 barangays, 309,770 people (the population is maintained from citypopulation.de; the area and barangay count are 注primary-source-unreached); the Supreme Court dates are not "decision April 2022 / final April 2023" but "decision 2021-12-01 / final 2022-09-28 / second reconsideration denied 2023-06-26"; San Juan = 5.87 km², the smallest city in the country is 注primary-source-unreached The Supreme Court's official site sc.judiciary.gov.ph / Supreme Court E-Library G.R. No. 235316 (dates) / citypopulation.de (population). Areas and rankings are 注primary-source-unreached (as of 2026-08-26)
11 ✅ Corroborated RA 12000 (the NIR Act) approved 2024-06-11 / three constituent provinces (including Bacolod City) / no single regional center (Section 4 = functional dispersion) Original text, LawPhil ra_12000_2024

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日本語の詳細版: 分野「地理・地方」「フィリピン 行政区画の完全リスト(18地方・82州・NCR17市町・HUC/ICC)」(本サイト日本語版)。関連=「地方自治制度と地方選挙の仕組み」「主要都市プロファイル(NCR/セブ/ダバオ)」「BARMM自治政府の統治構造」「PSGCコードを使った住所データ整備の実務」。