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:
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 (excluding Western New Guinea). 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.