MIMAROPA

Southwestern Tagalog Region Mimaropa
Region
From top, left to right: Apo Island; El Nido; Puerto Galera
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 group	Luzon
Regional center	Calapan (Oriental Mindoro)
Area
• Total	29,620.90 km2 (11,436.69 sq mi)
Population (2015 census)
• Total	2,963,360
• Density	100/km2 (260/sq mi)
Time zone	PST (UTC+8)
ISO 3166 code	PH-41
Provinces	5 Marinduque Occidental Mindoro Oriental Mindoro Palawan Romblon
Cities	2 Calapan Puerto Princesa
Municipalities	71
Barangays	1,458
Cong. districts	7
Languages	Tagalog Romblomanon Bantoanon or Asi Onhan Cuyonon Hiligaynon English others

The Southwestern Tagalog Region, designated as MIMAROPA Region, is an administrative region in the Philippines. It was also formerly designated as Region IV-B until 2016. It is one of five regions in the country having no land border with another region (the others being Western Visayas, Negros Island Region, Central Visayas, and 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 17 May 2002. On 23 May 2005, Palawan and the highly urbanized city of Puerto Princesa were moved to the region of Western Visayas by Executive Order No. 429. However, on 19 August 2005, then-President Arroyo issued Administrative Order No. 129 to put in abeyance Executive Order No. 429 pending a review. On 17 July 2016, Republic Act No. 10879 formally established the Southwestern Tagalog Region to be known as the MIMAROPA Region discontinuing the "Region IV-B" designation.

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