The Surabaya metropolitan area or Greater Surabaya, known locally as Gerbangkertosusila (, from Gresik-Bangkalan-Mojokerto-Surabaya-Sidoarjo-Lamongan), is a metropolitan area in East Java, Indonesia. It is the country's second-largest metropolitan area, after the Jakarta metropolitan area. Gerbangkertosusila had also been used in presidential decrees to refer to a larger region which includes Jombang, Bojonegoro, and Tuban Regencies.
Definition Grebangkertosusila is an official acronym of "Gresik Bangkalan Mojokerto Surabaya Sidoarjo Lamongan", a main metropolitan or planning area in East Java consisting of the seven cities and regencies with those names (Mojokerto is both a city and a separate regency). It has an area of 6,310.06 km2, and at the 2020 Census had a population of 9,924,509,Badan Pusat Statistik, Jakarta, 2021. rising to 10,081,343 according to the official estimates as at mid 2025.Badan Pusat Statistik, Jakarta, 2026.
The national government regards the Surabaya Metropolitan Area as including only Surabaya, Sidoarjo Regency, and Gresik Regency, known as "Zona Surabaya Raya". Gresik Regency includes Bawean Island, covering some 196 km2 and lying north of Java; however Bawean Island is excluded from the Metropolitan Area.
Demographics
Surabaya traditionally constituted Indonesia's second-largest metropolitan area, after Jakarta, but fast growing Bandung Metropolitan Area (in West Java) is since 2005 more populous. However, the extended metropolitan area of Surabaya is second in Indonesia only to Jabodetabek. The areas and populations at the 2010 Census,Biro Pusat Statistik, Jakarta, 2011. the 2020 CensusBadan Pusat Statistik, Jakarta, 2021. and according to the official estimates for mid 2025,Badan Pusat Statistik, Jakarta, 2026. are shown below for the component parts of the metropolitan area.
AdministrativeRegionArea(km2)mid 2025Pop'n2010CensusPop'n2020CensusPop'nmid 2025estimateOfficial estimates as at mid 2025 by Badan Pusat Statistik.Density(per km2)mid 2025 Surabaya City334.502,765,4872,874,3143,003,8608,980 Gresik Regency(a)1,264.011,177,0421,311,2151,343,4651,063 Sidoarjo Regency719.341,941,4972,082,8002,041,2602,838 Zona Surabaya Raya2,317.855,884,0266,268,3296,388,5852,756 Bangkalan Regency1,301.03906,7611,060,3771,112,956855 Mojokerto Regency969.361,025,4431,119,2091,162,8961,200 Mojokerto City20.21120,196132,424142,2727,040 Lamongan Regency1,812.801,179,0591,344,1701,370,318756 Gerbangkertosusila 6,421.25 9,115,485 9,924,509 10,177,027 1,585
Note: (a) The island of Bawean, while part of Gresik Regency, is not technically part of the Metropolitan area; nevertheless for convenience the figures given here include Bawean.
Reference: Statistics IndonesiaStatistics Indonesia Jawa Timur Hasil Sensus 2010, 12 Agustus 2011
Transportation
Surabaya metropolitan area has air connection via Juanda International Airport.
Surabaya metropolitan area has five commuter rail services with the network similar with KRL Commuterline in Jakarta metropolitan area. The services connects Surabaya city center to the neighboring cities and regency in the area.
The Suroboyo Bus city bus is serving Surabaya, using plastic waste as a form of payment. Ever since May 2022, however, direct payment using plastic bottles on the bus has been terminated and plastic waste has to be exchanged in designated points beforehand.
See also List of metropolitan areas by population Jakarta metropolitan area Semarang metropolitan area Bandung metropolitan area
Notes
References
Mera, Koichi and Renaud, Bertrand (2001). Asia's Financial Crisis and the Role of Real Estate. M.E. Sharpe.