South Tangerang (Indonesian: Tangerang Selatan) abbreviated as Tangsel, is a city in the province of Banten, Indonesia. Located 30 km (19 mi) on the southwestern border of Jakarta, the city forms part of the Greater Jakarta metropolitan area. It was administratively separated from Tangerang Regency on 26 November 2008. According to the 2020 Census, the city population was 1,354,350 inhabitants, while the official estimate as at mid 2024 was 1,429,629 - comprising 712,409 males and 717,120 females. The total area is 164.86 km (63.65 sq mi). It is the second-largest city in Banten (after Tangerang immediately to its north) in terms of population, and has grown rapidly, not only as Jakarta's satellite city, but also the development of business districts and commerce due to presence of large-scale planned town by private developers.
South Tangerang is home to some planned towns built by private developers, the notable ones are Alam Sutera (in North Serpong), BSD City (in Serpong and Setu), and Bintaro Jaya (in Pondok Aren and Ciputat), complete with facilities such as business centers, hospitals, shopping malls, and international schools such as British School Jakarta, Global Jaya School, German School Jakarta (Deutsche Schule Jakarta), and a Monash University campus in BSD, among other prominent private universities. Currently, the average land price in South Tangerang is the most expensive among Jakarta's satellite cities.