Thousand Islands (Kepulauan Seribu/ pulau seribu) is the only regency of Jakarta, Indonesia. A string of 105 islands stretching 45 kilometres north into the Java Sea, with the closest lying in Jakarta Bay only a few kilometres off mainland Jakarta. With total land area of 8.7 km² the population is about 20,000. Pulau Pramuka is the regency seat[citation needed] of the Thousand Islands although the most populated island is Panggang. The area is a marine national park although development is allowed on 37 of the islands. Kepulauan Seribu formally a subdistrict of North Jakarta, the regency is divided into 2 subdistricts: North Thousand Islands (Kepulauan Seribu Utara)and South Thousand Islands (Kepulauan Seribu Selatan).