The word "Chirang" has been derived from garo word -"chi" means water and "rang" means wealth. Chirang district is one of the four districts of bodoland territorial area district (btad) under the govt. Of assam, created vide notification no. Gag (b). 137/ 2002/ pt/ 117 dtd. 30/10/2003 within assam under clause 6 of article 332 by the 90th amendment act, 2003 of the constitution of india under the provision of the sixth schedule. The district has been functioning with effect from 04th june, 2004. It was carved out of the districts of kokrajhar, bongaigaon and barpeta. Kajalgaon is the district headquarter.