Kolasib is a district as well as a district headquarters of Kolasib district in Mizoram, India.
The district is bounded on the north and northwest by Hailakandi district of Assam state, on the west by Mamit district, on the south and east by Aizawl district and on the northeast by Cachar district of Assam state. The district occupies an area of 1382.51 km². Kolasib town is the administrative headquarters of the district.
Kolasib district has one completed Dam, Serlui B Dam and two under construction Bairabi Dam and Tuirial Dam Construction recommenced in September 2011.
The District has two R.D. Blocks, Bilkhawthlir and Thingdawl. The District has three assembly constituencies, Tuirial, Kolasib and Serlui
Kolasib is agriculture-dominated economy with a few service sector jobs as it is a district capital. A large number of people cultivate beetle nut, oil palms, rice, wheat and fish which is both consumed and exported to other districts of Mizoram.
The Major Newspapers in Kolasib are:
Major Television Cable Network in Kolasib are: