Serang (Kabupaten Serang) is a regency of Banten province, Indonesia. The administrative center of the regency and the capital of the province is the independent municipality of Serang (Kota Serang) which split off the regency. Serang is about 10 km from Old Banten, the eponymous former sultanate's capital. Merak, a major port and ferry terminal, is located just west of the regency. Serang Regency and its capital have experience a heavy influx of residents as Jakarta continues its outward growth; some planning agencies consider it to be part of the metropolitan area. It shares its eastern border with Tangerang Regency of Jabodetabek. Including Cilegon and Serang cities which the regency surrounds, the 2010 census population rises to 2,355,162 covering 1,909.59 km2 for a density of 1,233 per square kilometer.
Serang Regency (magenta) in Banten Province (yellow) of Java Island, facing Sunda Strait and Sumatra.