The table also includes the locations of the district administrative centres, the number of administrative villages in each district (a total of 116 rural desa and 9 urban kelurahan), and its postal codes.

It occupies the valleys and foothills of the southern and eastern slopes of the Müller Mountains, and rises to 1730 m at Mount Lesung on its northern border.

Most of the riverine area lies at an altitude of 100 to 200 m above sea level while the foothills are mostly at an altitude of 400–500 m. The Betikap and Sepathawung valleys, in the northwest part of the regency have been declared protected areas for orangutans.

Aside from the predominant subsistence fishing and farming, the biggest contributors to the economy are forestry and mining.

Timber, including high value trees such as Ulin (Eusideroxylon zwageri) and Meranti (genus Shorea), has been commercially extracted since the 1920s, while the mining sector, such as gold and tin mining, has developed since World War II.