Darrang (Assamese: ) is an administrative district in the state of Assam in India. The district headquarters are located at Mangaldai. The district occupies an area of 3481 km². In 1983 Sonitpur district was formed from part of Darrang.
This was repeated on 14 June 2004 with the creation of Udalguri district. Darrang district occupies an area of 3,481 square kilometres (1,344 sq mi), comparatively equivalent to Bahamas's North Andros Island. The main place of attraction in Darrang is Bhairabkund. Bhairabkund is a famous picnic spot in Assam. Geographically it shares the border with Bhutan and Arunachal Pradesh. Bhairabkund is a must see place in Assam. The other important towns in Darrang are Udalguri, Tangla, Sipajhar, Rowta, Kharupetia, Kalaigaon. There are four Assam Legislative Assembly constituencies in this district: Kalaigaon, Sipajhar, Mangaldoi, and Dalgaon. Mangaldoi is designated for scheduled castes. All four are in the Mangaldoi Lok Sabha constituency.