Southwestern Tagalog Region[1]
Apo Island in Apo Reef
El Nido
Romblon Bay
From top, left to right: Apo Island; El Nido; Romblon Bay
Location in the Philippines
Location in the Philippines
Coordinates: 10°40′N 119°30′E / 10.67°N 119.5°E / 10.67; 119.5Coordinates: 10°40′N 119°30′E / 10.67°N 119.5°E / 10.67; 119.5
Country Philippines
Island groupLuzon
Regional centerCalapan (Oriental Mindoro)
Largest cityPuerto Princesa
 • Total29,620.90 km2 (11,436.69 sq mi)
Highest elevation2,586 m (8,484 ft)
 (2020 census) [2]
 • Total3,228,558
 • Density110/km2 (280/sq mi)
Time zoneUTC+8 (PST)
ISO 3166 codePH-41
Cong. districts7
GDP (2021)382 billion
$7 billion[3]
Growth rateIncrease (3.3%)[3]
HDIIncrease 0.673 (Medium)
HDI rank15th in Philippines (2019)

Mimaropa (usually capitalized in official government documents), formally known as the Southwestern Tagalog Region,[4] is an administrative region in the Philippines. It was also formerly but still colloquially designated as Region IV-B until 2016. It is one of two regions in the country having no land border with another region (the other being Eastern Visayas). The name is an acronym combination of its constituent provinces: Mindoro (divided into Occidental Mindoro and Oriental Mindoro), Marinduque, Romblon and Palawan.

The region was part of the now-defunct Southern Tagalog region until May 17, 2002.[5] On May 23, 2005, Palawan and the highly urbanized city of Puerto Princesa were moved to the region of Western Visayas by Executive Order No. 429.[6] However, on August 19, 2005, then-President Arroyo issued Administrative Order No. 129 to put in abeyance Executive Order No. 429 pending a review.[7] On July 17, 2016, Republic Act No. 10879 formally established the Southwestern Tagalog Region to be known as Mimaropa discontinuing the "Region IV-B" designation, however no boundary changes were involved.[4]

Calapan is Mimaropa's regional center. However, most regional government offices such as the Department of Public Works and Highways[8] and the Department of Budget and Management are in Quezon City, Metro Manila.


Mimaropa, together with Calabarzon, were officially created with the partitioning of Southern Tagalog (Region IV) into the two regions on May 17, 2002, with the issuance of Executive Order No. 103 by then-President Gloria Macapagal Arroyo; for the purpose of promoting efficiency in the government, accelerating social and economic development and improving public services in the provinces covered. Region IV-B was designated as Mimaropa, which stands for the island provinces belonging to the Southern Tagalog region—Mindoro (Oriental and Occidental), Marinduque, Romblon and Palawan. Region IV-A was designated as Calabarzon.[5]

On May 23, 2005, Executive Order 429 was issued, moving the province of Palawan to the region of Western Visayas,[6] designating Region IV-B as "Mimaro". However, Palawan residents criticized the move, citing a lack of consultation, with most residents in Puerto Princesa and nearly all municipalities preferring to stay with Region IV-B. Consequently, Administrative Order No. 129 was issued on August 19, 2005, to address this backlash. This order directed the abeyance of Executive Order 429 pending the approval of an implementation plan for the orderly transfer of Palawan from Mimaropa to Region VI.[7]

The 2010 Philippine Census of Population reported the region's name as "Mimaropa" and included Palawan as part of the region.[9] As of 2014, it is not clear whether the transfer of Palawan to Western Visayas is still considered pending by the Philippine government. As of 2014, the National Statistical Coordinating Board of the Philippines continued to list Palawan province as part of the Mimaropa region.[10][needs update]

On July 17, 2016, Republic Act No. 10879 formally established the Southwestern Tagalog Region to be known as the Mimaropa Region. This involved no boundary changes but was in effect merely a renaming and discontinuation of the "Region IV-B" designation.[4]


Population census of Mimaropa
YearPop.±% p.a.
1903 179,800—    
1918 262,462+2.55%
1939 406,377+2.10%
1948 468,619+1.60%
1960 722,227+3.67%
1970 1,020,222+3.51%
1975 1,219,609+3.64%
1980 1,408,040+2.91%
1990 1,774,074+2.34%
1995 2,033,271+2.59%
2000 2,299,229+2.67%
2007 2,559,791+1.49%
2010 2,744,671+2.57%
2015 2,963,360+1.47%
2020 3,228,558+1.70%
Source: Philippine Statistics Authority [2][11]


A view of Calapan as seen in December 2009
A view of Calapan as seen in December 2009

The native languages of Mimaropa are:


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In 2007, Mimaropa's economy surged by 9.4%, making it the fastest growing region in the country in that year.[18] It was aided by robust growth in the industrial sector which grew by 19.1% from -6.1% in 2006.[18] Mimaropa experienced a big slowdown in 2006, posting a decelerated growth of 2.3% from a 6.4% increase in 2005. This resulted mainly from the slump in the industry sector, which shrunk by 5.4% in 2006 from its 10.8% increase in 2005.

The agriculture, forestry, and fishing sector, which contributed 42.1% to the total regional economy, grew by 9.1% in 2006, accelerating from 3.2% the previous year. The higher production of rice, maize, other crops, livestock and fishery resulted in the accelerated growth in the total agriculture and fishery sector.

The industry sector, which contributed 38.3% to the region's total economy, was the second largest contributor next to agriculture. Its decline of 5.4% was largely attributed to the decrease in the mining and quarrying sub-sector, which went down by 15.4% due to the reduced production of natural gas in Palawan. Mining and quarrying contributed 16.6% to the total regional economy. The positive growth in the electricity and water, construction and manufacturing sub-sectors were not able to compensate to the drop in the mining and quarrying sub-sector.

The service sector, on the other hand, posted an accelerated growth of 5.1%, which was attributed to the increase in the TCS, finance, private services, government services and trade sub-sectors, which managed to post accelerated growths of 6.0%, 5.5%, 5.1%, 5.1% and 4.7%, respectively. The other sub-sector, however, had a decelerated growth due to the slowdown in the ownership of dwelling.


There are many scenic spots in Mimaropa. Some of them are the Bathala Cave, Balanacan Bay, and Tres Reyes Islands in the province of Marinduque; White Island in Mindoro; Fort San Andres, Mount Guiting-Guiting, and Bonbon Beach in Romblon; and the Puerto Princesa Subterranean River National Park and El Nido Marine Reserve Park in Palawan.

Administrative divisions


Political map of Mimaropa
Political map of Mimaropa

Mimaropa comprises 5 provinces, 1 highly urbanized city (Puerto Princesa), 1 component city (Calapan), 71 municipalities and 1,458 barangays.

Province or HUC Capital Population (2020)[19] Area Density Cities Muni. Barangay
km2 sq mi /km2 /sq mi
Marinduque Boac 7.4% 239,207 952.58 367.79 250 650 0 6 218
Occidental Mindoro Mamburao 16.3% 525,354 5,865.70 2,264.76 90 230 0 11 162
Oriental Mindoro Calapan 28.1% 908,339 4,238.40 1,636.46 210 540 1 14 426
Palawan Puerto Princesa 29.1% 939,594 14,649.70 5,656.28 64 170 0 23 367
Romblon Romblon 9.6% 308,985 1,533.50 592.09 200 520 0 17 219
Puerto Princesa 9.5% 307,079 2,381.02 919.32 130 340 66
Total 3,228,558 29,620.90 11,436.69 110 280 2 71 1,458

 †  Puerto Princesa is a highly-urbanized city pursuant to Presidential Proclamation No. 1264;[20] figures are excluded from Palawan.

Governors and vice governors

Province Image Governor Political Party Vice Governor
Gov Velasco.png
Presbitero J. Velasco, Jr. PDP–Laban Adeline Angeles
Ph seal occidental mindoro.png
Gov Gadiano.png
Eduardo Gadiano PDDS Anecita Diana Apigo-Tayag
Ph seal Oriental Mindoro.png
Gov Dolor.png
Humerlito Dolor PDP–Laban Ejay Falcon
Ph seal palawan.png
Gov Socrates.png
Victorino Dennis M. Socrates PPPL Leoncio Nacasi Ola
Ph seal romblon.png
Gov Riano.png
Jose Riano PDP–Laban Armando Gutierrez


  1. ^ "Philippine Statistics Authority | Republic of the Philippines". Archived from the original on December 28, 2017. Retrieved March 6, 2017.
  2. ^ a b Census of Population (2015). "Region IV-B (Mimaropa)". Total Population by Province, City, Municipality and Barangay. PSA. Retrieved June 20, 2016.
  3. ^ a b "Gross Regional Domestic Product". Philippine Statistics Authority. Retrieved May 20, 2021.
  4. ^ a b c "An Act establishing the Southwestern Tagalog Region, to be known as the MIMAROPA Region". July 17, 2016. Retrieved January 4, 2017.
  5. ^ a b "Executive Order No. 103: Dividing Region IV into CALABARZON Region and MIMAROPA Region, Transferring the Province of Aurora to Region III and for Other Purposes". Philippine Statistics Authority - National Statistical Coordination Board. Archived from the original on May 18, 2016. Retrieved November 1, 2014.
  6. ^ a b "Executive Order No. 429: Providing for the Reorganization of Administrative Region VI to Include the Province of Palawan and Puerto Princesa City". Philippine Statistics Authority - National Statistical Coordination Board. Archived from the original on May 31, 2016. Retrieved November 1, 2014.
  7. ^ a b "Administrative Order no. 129" Archived February 19, 2006, at the Wayback Machine. National Statistical Coordination Board. Retrieved on March 22, 2011.
  8. ^ "Region IV-B Directory: Regional Office Directory". Department of Public Works and Highways. Archived from the original on August 2, 2012. Retrieved November 2, 2014.
  9. ^ "Population and Annual Growth Rates by Province, City, and Municipality : Region IVB - MIMAROPA: 1990, 2000, and 2010". 2010 Philippine Census of Population. Archived from the original on July 7, 2012.
  10. ^ "Region: REGION IV-B (MIMAROPA)". National Statistical Coordinating Board of the Philippines. Archived from the original on August 2, 2014. Retrieved May 26, 2012.
  11. ^ "Population and Annual Growth Rates for The Philippines and Its Regions, Provinces, and Highly Urbanized Cities" (PDF). 2010 Census and Housing Population. Philippine Statistics Authority. Archived from the original (PDF) on September 28, 2013. Retrieved August 9, 2013.
  12. ^ "Poverty incidence (PI):". Philippine Statistics Authority. Retrieved December 28, 2020.
  13. ^; publication date: 8 February 2011; publisher: Philippine Statistics Authority.
  14. ^; publication date: 27 August 2016; publisher: Philippine Statistics Authority.
  15. ^; publication date: 27 August 2016; publisher: Philippine Statistics Authority.
  16. ^; publication date: 27 August 2016; publisher: Philippine Statistics Authority.
  17. ^; publication date: 4 June 2020; publisher: Philippine Statistics Authority.
  18. ^ a b "NSCB - 2007 Gross Regional Domestic Product". National Statistical Coordination Board. July 28, 2008. Archived from the original on April 20, 2009. Retrieved May 18, 2009.
  19. ^ Census of Population (2020). "MIMAROPA". Total Population by Province, City, Municipality and Barangay. PSA. Retrieved July 8, 2021.
  20. ^ "Puerto Princesa to hold plebiscite simultaneous with May 14 elections". Philippine Information Agency (Press release). April 27, 2007.