Geographically, district is located at Western side of the state and Agro-climatically falls in Lower Brahmaputra Valley Zone. Total geographical area of the district is 4345sq. km (4, 34,500 ha) viz.  5.5 % of the total geographical area of the state. The district is surrounded by Darrang and Morigaon district on the East, Nalbari and Goalpara district on the West, Bhutan on the North and Meghalaya on the South. The mighty Brahmaputra passes through the district. The major rivulet in the north bank starting in the Bhutan is Puthimari drain at the Brahmaputra. The rivulets in the south bank viz., Boko, Kulsi, Singra, Bharalu and Digaru started at Meghalaya and drain water at the Brahmaputra River. It is well connected by airways, railways and roadways to different parts of the country. National highway 31, 37, 40 and 56 passes through the district. North East Frontier Railways have its divisional headquarter at Rangia. The state capital Dispur is situated in the district. The district headquarter Guwahati is the doorstep to the North Eastern States of India.