Rangkasbitung (Sundanese: ᮛᮀᮊᮞ᮪ᮘᮤᮒᮥᮀ) (colloquially called Rangkas) is a town which is the administrative centre of Lebak Regency, in Banten Province of Java, Indonesia. It had a population of 134,945 at the 2020 Census, while the official estimate as at mid 2021 was 137,041.It is the site of the Multatuli Museum, a history museum which opened in 2018.