Western Indonesia

Western Indonesia
Indonesia Barat
Region
Country Indonesia
ProvincesAceh
North Sumatra
West Sumatra
Riau
Jambi
South Sumatra
Bengkulu
Lampung
Bangka Belitung Islands
Riau Islands
Jakarta
West Java
Central Java
Special Region of Yogyakarta
East Java
Banten
West Kalimantan
Central Kalimantan
South Kalimantan
East Kalimantan
North Kalimantan
Largest cityJakarta
Other major citiesSurabaya
Bandung
Medan
Semarang
Palembang
Batam
Balikpapan
Samarinda
Pekanbaru
Area
 • Total
854,164 sq mi (2,212,274 km2)
 • Land236.400 sq mi (612.274 km2)
 • Water620,000 sq mi (1,600,000 km2)
Population
 (2022)
 • Total
230.563.678
 • Density0.975308/sq mi (0.376568/km2)
Time zonesUTC+07:00 (Western Indonesia Time)
UTC+08:00 (Central Indonesia Time)
Official languageIndonesian
Regional languagesJavanese
Sundanese
Malay
Batak
Minangkabau
Dayak
Banjarese
Acehnese

Western Indonesia (Indonesian: Indonesia Barat; pronounced [ɪndoˌnes(i)ja ˈbarat̪̚]) is one of the two main geographical regions of Indonesia, the other being Eastern Indonesia. It consists of 21 provinces in Java, Kalimantan, and Sumatra. Western Indonesia Time (Indonesian: Waktu Indonesia Barat, WIB; pronounced [ˌwak̚t̪u ɪndoˌnes(i)ja ˈbarat̪̚]) is seven hours ahead (UTC+07:00) of the Coordinated Universal Time (UTC), used in the islands of Sumatra, Java, and the western half of Kalimantan.

Western Indonesia has a land border with East Malaysia to the North and Peninsular Malaysia to the West.