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, Indonesia is divided into 7 geographical units, with each unit consisting of major islands or an island group. These geographical units are as follows:| Code | Geographical unit | Provinces |
| ID-JW | Java | Banten, SCR of Jakarta, West Java, Central Java, SR of Yogyakarta, East Java |
| ID-KA | Kalimantan | West Kalimantan, Central Kalimantan, North Kalimantan, East Kalimantan, South Kalimantan |
| ID-ML | Maluku Islands | North Maluku, Maluku |
| ID-NU | Lesser Sunda Islands | Bali, West Nusa Tenggara, East Nusa Tenggara |
| ID-PP | Western New Guinea | West Papua, Papua |
| ID-SL | Sulawesi | North Sulawesi, Gorontalo, Central Sulawesi, West Sulawesi, South Sulawesi, Southeast Sulawesi |
| ID-SM | Sumatra | Aceh, North Sumatra, West Sumatra, Riau, Riau Islands, Jambi, Bengkulu, South Sumatra, Bangka Belitung Islands, Lampung |
Eastern 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 East or 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 August 1950. Currently, Eastern Indonesia consists of 13 provinces: Bali, West Nusa Tenggara, East Nusa Tenggara, North Sulawesi, Gorontalo, Central Sulawesi, West Sulawesi, South Sulawesi, Southeast Sulawesi, Maluku, North Maluku, Papua, and West Papua.Development regions
According to the National Development Planning Agency, Indonesia is divided into 4 main development regions, with each being led by the major cities of Medan, Jakarta, Surabaya, and Makassar.| Main development region | Central city | Development regions | Provinces |
| Main Development Region A | Medan | Development Region I | Aceh, North Sumatra |
| Main Development Region A | Medan | Development Region II | West Sumatra, Riau, Riau Islands |
| Main Development Region B | Jakarta | Development Region III | Jambi, South Sumatra, Bengkulu, Bangka Belitung Islands |
| Main Development Region B | Jakarta | Development Region IV | Lampung, Banten, Special Capital Region of Jakarta, West Java, Central Java, Special Region of Yogyakarta |
| Main Development Region B | Jakarta | Development Region V | West Kalimantan |
| Main Development Region C | Surabaya | Development Region VI | East Java, Bali |
| Main Development Region C | Surabaya | Development Region VII | Central Kalimantan, North Kalimantan, East Kalimantan, South Kalimantan |
| Main Development Region D | Makassar | West Nusa Tenggara, East Nusa Tenggara, West Sulawesi, South Sulawesi, Southeast Sulawesi | |
| Main Development Region D | Makassar | Development Region IX | Central Sulawesi, Gorontalo, North Sulawesi |
| Main Development Region D | Makassar | Development Region X | Maluku, North Maluku, Papua, West Papua |