Cilacap Regency (Javanese: ꦏꦨꦸꦥꦠꦺꦤ꧀ꦕꦶꦭꦕꦥ꧀, also spelt: Chilachap, old spelling: Tjilatjap, Sundanese: ᮊᮘᮥᮕᮒᮦᮔ᮪ ᮎᮤᮜᮎᮕ᮪) is a regency (Indonesian: kabupaten) in the southwestern part of Central Java province in Indonesia. Its capital is the town of Cilacap, which had 263,098 inhabitants in mid 2024, spread over three administrative districts.
Cilacap Regency covers an area of 2,249.28 km (including the 115-km Nusakambangan Island off the south coast), and it had a population of 1,642,107 at the 2010 Census and 1,944,857 at the 2020 Census; the official estimate as at mid-2024 was 2,007,829 (comprising 1,020,920 males and 1,006,459 females). The languages used in Cilacap are Javanese and Sundanese, although most people can speak Indonesian; the dialect of Javanese used is Banyumasan.
