Sonitpur is an administrative district in the state of Assam in India. It stands among the largest districts of Assam. In terms of area Sonitpur is the second largest district of Assam after Karbi Anglong district. It is spread over an area of 5324 km2 on the northern banks of Brahmaputra, the lifeline of Assam. The population of Sonitpur district is 19, 24,110 as per 2011 Census. It is the third most populous district of Assam (out of 27), after Nagaon and Dhubri. The demography of Sonitpur district is not entirely homogenous as several linguistic, religious and ethnic communities and groups live in Sonitpur district. It is also home to several natural beauty and wildlife hotspots with number of such wildlife sanctuaries, national parks are situated in and around Sonitpur. The district headquarters are located at Tezpur. Distance from State Capital (Dispur) is 198 km (via Nagaon) and 181 km (via Mangaldoi). Sonitpur District falls in the Sub-Tropical climatic region, and enjoys Monsoon type of climate. Summers are hot and humid; with an average temperature of 29 °C. Summer rain is heavy which is both a boon and a bane for the people. A boon, for it provides natural irrigation to the fields; and a bane, as it causes the rivers to overflow their banks and cause floods. Winters extend from the month of October to February, and are cold and generally dry, with an average temperature of 16 °C. It gets quite chilling in late December and early January, on account of snowfall in the upper reaches of Arunachal Pradesh. Flora and fauna: In 1998 Sonitpur district became home to Nameri National Park, which has an area of 200 km2 (77.2 sq mi). It is also home to Orang National Park, which it shares with Darrang district. Orang was established in 1999 and has an area of 79 km2 (30.5 sq mi). Sonitpur is home to two wildlife sanctuaries: Burachapori Wildlife Sanctuary and Sonai Rupai Wildlife Sanctuary. It is also home to Behali, Naduar, Charduar RF.