Mandalawangi is a village and an administrative district (kecamatan) located in the northeast corner of Pandeglang Regency in Banten Province on Java, Indonesia. It covers an area of 80.19 km<sup>2</sup> and had a population of 46,805 at the 2010 Census and 55,287 at the 2020 Census; the official estimate as at mid 2023 was 57,028. The administrative centre is in Cikoneng village.
Mandalawangi District is sub-divided into fifteen rural villages (desa), all sharing the postcode 42261. These are listed below with their areas and their officially-estimated populations as at mid 2022.
Notes: (a) comprising 30,398 males and 28,894 females.