# Regions of Indonesia

"none" is preferred when the title is sufficiently descriptive; see [[WP:SDNONE]]
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 (mid-2023) | Largest city | Highest point |
| ID-SM | 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 (12484 ft) |
| ID-JW | 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 (12067 ft) |
| ID-KA | Kalimantan | Central Kalimantan, East Kalimantan, North Kalimantan, South Kalimantan, and West Kalimantan | 17,259,000 | Samarinda | Mount Bukit Raya 2,278 m (7,474 ft) |
| ID-NU | Nusa Tenggara (Lesser Sunda Islands) | Bali, West Nusa Tenggara, and East Nusa Tenggara | 15,533,700 | Denpasar | Mount Rinjani 3,726 m (12,224 ft) |
| ID-SL | Sulawesi | Central Sulawesi, Gorontalo, North Sulawesi, South Sulawesi, Southeast Sulawesi, and West Sulawesi | 20,573,900 | Makassar | Latimojong 3,478 m (11,411 ft) |
| ID-ML | Maluku Islands | Maluku and North Maluku | 3,401,600 | Ambon | Mount Binaiya 3,027 m (9,931 ft) |
| ID-PP | 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 (16,024 ft) |

## 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 (excluding Western New Guinea). 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(s) |
| Main Development Region A (Wilayah Pembangunan Utama A) | Medan | Development Region I | Aceh and North Sumatra |
| Main Development Region A (Wilayah Pembangunan Utama A) | Medan | Development Region II | Riau, the Riau Islands, and West Sumatra |
| Main Development Region B (Wilayah Pembangunan Utama B) | Jakarta | Development Region III | The Bangka Belitung Islands, Bengkulu, Jambi, and South Sumatra |
| Main Development Region B (Wilayah Pembangunan Utama 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 (Wilayah Pembangunan Utama B) | Jakarta | Development Region V | West Kalimantan |
| Main Development Region C (Wilayah Pembangunan Utama C) | Surabaya | Development Region VI | East Java and Bali |
| Main Development Region C (Wilayah Pembangunan Utama C) | Surabaya | Development Region VII | Central Kalimantan, East Kalimantan, North Kalimantan, and South Kalimantan |
| Main Development Region D (Wilayah Pembangunan Utama D) | Makassar | Development Region VIII | East Nusa Tenggara, West Nusa Tenggara, South Sulawesi, Southeast Sulawesi, and West Sulawesi |
| Main Development Region D (Wilayah Pembangunan Utama D) | Makassar | Development Region IX | Central Sulawesi, Gorontalo, and North Sulawesi |
| Main Development Region D (Wilayah Pembangunan Utama D) | Makassar | Development Region X | Maluku, North Maluku, Central Papua, Highland Papua, Papua, South Papua, Southwest Papua, and West Papua |