Umrangso is an industrial town and a town area committee in Dima Hasao district in the state of Assam, India. It is located at the border of Assam and Meghalaya states some 112 km from Haflong, the district headquarters of Dima Hasao district of Assam. The region has been deeply affected by factional violence involving several armed insurgent groups fighting among themselves and with the Indian Security Forces. Since 2011 there has been a decrease in violence following arrests of several high-ranking insurgent leaders and a cease-fire agreement with the Indian Government. A government of India enterprise, located in the Dima Hasao district (formerly known as North Cachar Hills district) near the Assam-Meghalaya border, the hot spring of Garampani is now lost in the dammed water of Kopili river after completion of Kopili Hydro Electric Project. The Kopili Hydro Electric Project was the maiden venture of NEEPCO when it came into existence in 1976.