Regions of Indonesia

This is a list of some of the regions of Indonesia. Many regions are defined in law or regulations by the central government. At different times of Indonesia's history, the nation has been designated as having regions that do not necessarily correlate to the current administrative or physical geography of the territory of the nation.

Geographical units

According to ISO 3166-2:ID, Indonesia is divided into seven geographical units, with each unit consisting of major islands or an island group. These geographical units are as follows:

Code	Geographical unit	Provinces	Population	Largest city	Highest point
	Sumatra	Aceh, the Bangka Belitung Islands, Bengkulu, Jambi, Lampung, North Sumatra, Riau, the Riau Islands, South Sumatra, and West Sumatra	60,756,400	Medan	Mount Kerinci 3,805 m
	Java	Banten, Central Java, East Java, the Special Capital Region of Jakarta, the Special Region of Yogyakarta, and West Java	155,645,500	Jakarta	Mount Semeru 3,678 m
	Kalimantan	Central Kalimantan, East Kalimantan, North Kalimantan, South Kalimantan, and West Kalimantan	17,259,000	Samarinda	Mount Bukit Raya 2,278 m
	Nusa Tenggara (Lesser Sunda Islands)	Bali, West Nusa Tenggara, and East Nusa Tenggara	15,533,700	Denpasar	Mount Rinjani 3,726 m
	Sulawesi	Central Sulawesi, Gorontalo, North Sulawesi, South Sulawesi, Southeast Sulawesi, and West Sulawesi	20,573,900	Makassar	Latimojong 3,478 m
	Maluku Islands	Maluku and North Maluku	3,401,600	Ambon	Mount Binaiya 3,027 m
	Papua (Western New Guinea)	Central Papua, Highland Papua, Papua, South Papua, Southwest Papua, and West Papua	5,670,000	Jayapura	Puncak Jaya 4,884 m

Eastern Indonesia and Western Indonesia

During the last stages of the Dutch colonial era, the area east of Java and Kalimantan was known as the Great East and later known as Eastern Indonesia. On 24 December 1946, the State of East Indonesia was formed covering the same area. It was a component of the United States of Indonesia, and was dissolved into the unitary Republic of Indonesia in 17 August 1950. Currently, Eastern Indonesia consists of 17 provinces: Bali, East Nusa Tenggara, West Nusa Tenggara, Central Sulawesi, Gorontalo, North Sulawesi, South Sulawesi, Southeast Sulawesi, West Sulawesi, Maluku, North Maluku, Central Papua, Highland Papua, Papua, South Papua, Southwest Papua, and West Papua. Meanwhile, the region comprising the other 21 provinces in Sumatra, Java, and Kalimantan is known as Western Indonesia.

Development regions

According to the National Development Planning Agency, Indonesia is divided into four main development regions, with each being led by the major cities of Medan, Jakarta, Surabaya, and Makassar.

Main development region	Central city	Development region	Province
Main Development Region A	Medan	Development Region I	Aceh and North Sumatra
Main Development Region A	Medan	Development Region II	Riau, the Riau Islands, and West Sumatra
Main Development Region B	Jakarta	Development Region III	The Bangka Belitung Islands, Bengkulu, Jambi, and South Sumatra
Main Development Region B	Jakarta	Development Region IV	Lampung, Banten, Central Java, the Special Capital Region of Jakarta, the Special Region of Yogyakarta, and West Java
Main Development Region B	Jakarta	Development Region V	West Kalimantan
Main Development Region C	Surabaya	Development Region VI	East Java and Bali
Main Development Region C	Surabaya	Development Region VII	Central Kalimantan, East Kalimantan, North Kalimantan, and South Kalimantan
Main Development Region D	Makassar		East Nusa Tenggara, West Nusa Tenggara, South Sulawesi, Southeast Sulawesi, and West Sulawesi
Main Development Region D	Makassar	Development Region IX	Central Sulawesi, Gorontalo, and North Sulawesi
Main Development Region D	Makassar	Development Region X	Maluku, North Maluku, Central Papua, Highland Papua, Papua, South Papua, Southwest Papua, and West Papua