Drs. Syahruddin, M.Si (2013–present) Drs. Tengku Alisyahbana, M.Si(2011–2013) Drs. Abdul Wahab (2008–2011) Drs. Gusti M. Imansyah (2002–2008) Yunus B. A. (2000–2002) Drs. Sukarman Agani (1997–2000) Gusti Suharman (1994–1997) Drs. Abdul Muis (????–1994) M. Achyar, BA - (1977-1985) Hasbullah - Amsar - Geography Kumai has total area about 2.921,00 km2. On the north side, the Kumi is adjacent to the Arut Utara district. Seruyan regency is to the East, Java Sea to the South, and Arut Selatan to the West. Topographics The northern region of the Kumai District consists mostly of fertile plains. The center and southern regions are wetter, and are made up of bogs, lakes, and other various bodies of water. Climate There are two seasons in Kumai, namely the dry and rainy seasons. The temperature averages about 20 to 30 degrees Celsius, and the mount inclination is about 0 to 100 m and 0 to 80%. Demographics Kumai District is the largest district in the West Kotawaringin regency, and is divided into three sub-districts: Kumai, Pangkalan Lada, and Pangkalan Banteng. Each district is about 4.456 km2. There are 39,086 people living in Kumai. Kumai has 155 RTs (neighborhood administrative units), and 23 RWs (residence administrative units). The capital of Kumai District is Kumai. It is divided into three sub-districts and eighteen administrative villages (rural desa and urban kelurahan). The sub districts are Kumai Hulu, Kumai Hilir and Candi. The regions are Cabang, Teluk Pulai, Sekonyer, Batu Belaman, Pangkalan Satu, Kubu, Sei, Bakau, Bedaun, Teluk Bogam, Keraya, Sebuai, Kapitan, and Bumiharjo. The capital of the Pangkalan Lada district is Pandu Senjaya. The district was initially proposed as a center for Kumai, covering seven counties (Makarti Jaya, Pangkalan Lada, Pandu Senjaya, Lada Mandala Jaya, Sumber Agung, Sungai Rangit Jaya and Purba Sari). Karang Mulya is the capital of Pangkalan Banteng District (ex Natai Kerbau SP 4). It is the easternmost district and covers eight counties (Desa Mulya Jadi, Pangkalan Banteng, Karang Mulya, Marga Mulya, Arga Mulya, Amin Jaya, Sido Mulya and Kebun Agung). Ethnic backgrounds The majority of the people are Malay and Banjarese. The others are Madurese, Javanese, Bugis, Sundanese, Dayak, Chinese, java and some foreign citizens (volunteers, researchers and tourists). Religion The majority of the people are Muslim (85%). Others are Hindu, Buddhist, and Christian (Protestant and Catholic). There are 33 Muslim mosques in the Kumai District, 83 small mosques, three churches and one other house of worship.