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Region IV-B
Southern Tagalog islands
Map of the Philippines showing the location of Region IV-B
Map of the Philippines showing the location of Region IV-B
Country Philippines
Island group Luzon
Regional center Calapan City, Oriental Mindoro
 • Total 29,621 km2 (11,437 sq mi)
Population (2010)[1]
 • Total 2,744,671
 • Density 93/km2 (240/sq mi)
Time zone PST (UTC+8)
ISO 3166 code PH-41
Provinces 5
Cities 2
Municipalities 71
Barangays 1458
Cong. districts 7
Languages Tagalog, Romblomanon, Bantoanon or Asi, Onhan, Cuyonon, English, others

Coordinates: 10°40′N 119°30′E / 10.667°N 119.500°E / 10.667; 119.500 MIMAROPA is an administrative region of the Philippines, designated as Region IV-B. It is one of two regions of the Philippines having no land border with another region, Eastern Visayas being the other. The name is an acronym combining the names of its provinces, which are: Mindoro(divided into Occidental Mindoro and Oriental Mindoro), Marinduque, Romblon and Palawan. The region is also more formally known as Southern Tagalog Islands.[2]

Calapan City is the regional center, however, most regional government offices like the Department of Public Works [3] are in Quezon City, Metro Manila.

On May 23, 2005, Palawan and the highly urbanized city of Puerto Princesa were moved to Western Visayas by Executive Order No. 429.[4] However, on August 19, 2005, President Arroyo issued Administrative Order No. 129 to hold the earlier EO 429 in abeyance pending a review.[5]


Executive Order No. 103, dated May 17, 2002, divided Region IV (Southern Tagalog) into Region IV-A (CALABARZON) and Region IV-B (MIMAROPA).[6]

President Gloria Macapagal-Arroyo issued Executive Order 103 (EO103) on May 17, 2002 which subdivided the Southern Tagalog provinces which were included in Region IV into two regions — Regions IV-A and IV-B — to promote efficiency in the government, accelerate social and economic development and improve public services. Region IV-A is now known as CALABARZON (which stands for the provinces of Cavite, LAguna,BAtangas, Rizal and QueZON). Region IV-B is known as MIMAROPA, standing for the island provinces belonging to the region — MIndoro (Oriental and Occidental), Marinduque, ROmblon and PAlawan. EO103 also transferred the province of Aurora to Region III in Central Luzon.

Executive Order 429 moved Palawan to Region VI on May 23, 2005.[4] After this, Region IV-B began to be called MIMARO instead of MIMAROPA. However, Palaweños criticized the move, citing a lack of consultation, with most residents in Puerto Princesa City 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.[5]

The 2010 Philippine Census of Population continued to report the Region IV name as 'Mimaropa' and continued to list the province of Palawan as part of that region.[7] As of 2012, it is not clear whether or not the transfer of Palawan to region VI is still considered pending by the Philippine government. As of 2012, the National Statistical Coordinating Board of the Philippines continues to list Palawan province as part of the MIMAROPA region.[8][dated info]


Population census of MIMAROPA
Year Pop. ±%
1990 1,774,074 —    
2000 2,299,229 +29.6%
2010 2,744,671 +19.4%
Source: National Statistics Office[1]


Tagalog is widely spoken in the region. In Marinduque, Tagalog is spoken with a unique blend of Bicolano and Visayan languages. Aside from Tagalog, there are other major languages being used by the people in different provinces and localities.

In the interior of Mindoro, various languages are spoken by Mangyans, and they include Iraya, Alangan, Tawbuid, Hanunoo, Tadyawan, Buhid, and Ratagnon. The latter is a Visayan language with fewer than three speakers. Romblon, being near the Visayas, has three main languages that belong to Visayan language family namely, Romblomanon, Asi, and Onhan. Palawan has its own set of native languages such as Cuyonon, Calamian Tagbanwa and Palawano that are spoken by significant numbers of people.


In 2007, MIMAROPA's economy surged by 9.4%, making it the fastest growing region in the country in that year.[9] It was aided by robust growth in the industrial sector which grew by 19.1% from -6.1% in 2006.[9]

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 palay, corn, 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 subsector, 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 subsectors were not able to compensate to the drop in the mining and quarrying subsector.

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 subsectors, which managed to post accelerated growths of 6.0%, 5.5%, 5.1%, 5.1% and 4.7%, respectively. The other subsector, however, had a decelerated growth due to the slowdown in the ownership of dwelling.

Political divisions[edit]

MIMAROPA is divided into five provinces. It consist of one highly urbanized city and one component city.


Political map of MIMAROPA
Province Capital Population
Ph seal Marinduque.png Marinduque Boac 227,828 952.58 Carmencita O. Reyes
Ph seal occidental mindoro.png Occidental Mindoro Mamburao 452,971 5,865.7 Mario Gene Mendiola
Provincial seal of Oriental Mindoro.png Oriental Mindoro Calapan City 785,602 4,238.4 Alfonso Umali, Jr.
Palawan, Philippines seal.png Palawan Puerto Princesa City 771,667 14,649.7 Jose C. Alvarez
Ph seal romblon.png Romblon Romblon 283,930 1,533.5 Eduardo C. Firmalo


City Province City Class Income Class Population
Ph seal puertoprincesa.png Puerto Princesa CityA Palawan
Highly Urbanized 1st Class 222,673 2,381.02 Lucilo R. Bayron
Calapan City Logo.png Calapan City Oriental Mindoro Component 3rd Class 124,173 250.06 Arnan C. Panaligan

A Figures for Puerto Princesa, which became a highly urbanized city in 2007 pursuant to Presidential Proclamation No. 1264,[11] do not accrue to Palawan province.


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


  1. ^ a b "Population and Annual Growth Rates for The Philippines and Its Regions, Provinces, and Highly Urbanized Cities". 2010 Census and Housing Population. National Statistics Office. Retrieved 9 August 2013. 
  2. ^ Philippines EIA
  3. ^ Welcome to www.DPWH.gov.ph
  4. ^ a b "Executive Order no. 429". National Statistical Coordination Board. Retrieved on 2010-03-22.
  5. ^ a b "Administrative Order no. 129". National Statistical Coordination Board. Retrieved on 2011-03-22.
  6. ^ "Executive Order No. 103". Retrieved 2009-05-18. 
  7. ^ "Population and Annual Growth Rates by Province, City, and Municipality : Region IVB - MIMAROPA: 1990, 2000, and 2010". 2010 Philippine Census of Population. census.gov.ph. 
  8. ^ "Region: REGION IV-B (MIMAROPA)". National Statistical Coordinating Board of the Philippines. Retrieved 2012-05-26. 
  9. ^ a b "NSCB - 2007 Gross Regional Domestic Product". National Statistical Coordination Board. 28 July 2008. Retrieved 2009-05-18. 
  10. ^ http://www.census.gov.ph/sites/default/files/attachments/hsd/pressrelease/Population%20and%20Annual%20Growth%20Rates%20for%20The%20Philippines%20and%20Its%20Regions%2C%20Provinces%2C%20and%20Highly%20Urbanized%20Cities%20Based%20on%201990%2C%202000%2C%20and%202010%20Censuses.pdf
  11. ^ "Puerto Princesa to hold plebiscite simultaneous with May 14 elections" (Press release). Philippine Information Agency. April 27, 2007.