Dibru-Saikhowa National Park is a national wildlife park in Tinsukia, Assam, India. Dibru - Saikhowa national park is located at about 12 km north of Tinsukia town of Assam covering an area of 350 sq km. It is also a biosphere reserve. The park bounded is by the Brahmaputra and Lohit rivers in the north and Dibru river in the south. It is situated in Dibrugarh and Tinsukia district of Assam. It mainly consists of moist mixed semi-evergreen forests, moist mixed deciduous forests, canebrakes and grasslands.
It is the largest salix swamp forest in north east India. Situated in the flood plains of the Brahmaputra and the Lohit, at an altitude of 118 m above sea level, Dibru-Saikhowa is a safe haven for many endangered species. Due to the auto stocking by the Brahmaputra and Dibru river, it is rich in fish diversity. Dibru Saikhowa has tropical monsoon climate with a hot and wet summer and cool and usually dry winter. The annual rainfall ranges from 2300 mm to 3800 mm. The main rainy months are June, July, August, September. The average coldest and warmest temperature of the area ranges from 7°C to 34°C where June, July and August are the hottest while December and January are the coolest months.
The area was declared as Dibru Reserved Forest in 1890. In 1920, additional area was added to the Dibru Reserve Forest. In 1929, Saikhowa Reserve Forest was declared. In 1933, more area was added to the Dibru RF. In 1986, an area of 650 sq km was preliminarily declared as a Wildlife Sanctuary out of which finally 340 sq km was declared as Wildlife Sanctuary in 1995. In 1997, Dibru-Saikhowa Biosphere Reserve was declared with and area of 765 km2 that included the 340 km2 of Sanctuary area as the core. In 1999, the 340 km2 of Sanctuary area was declared as National Park. Originally created to help conserve the habitat of the rare White-winged wood duck, the park is also home to other rare creatures such as water buffalo, wild horse, the tiger and Capped Langur. The park also has some Eco lodges.