Regions of Indonesia

Many regions are defined in law or regulations by the central government.

These geographical units are as follows: 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).

[3][4][5] Meanwhile, the region comprising the other 21 provinces in Sumatra, Java, and Kalimantan is known as Western Indonesia.

[6] 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.