The Dhemaji district came into being on 14th August / 1st October 1989. It comprises of erstwhile Dhemaji and Jonai sub-division and parts of Machkhowa mouza and Bordoloni. Forted by arch shaped Arunachal hills on the North and the East, the district emerges from the foot hills and streches to the Brahmaputra river with Subansiri one side and the river Siang on the other. Geographically situated between the 940 12' 18'' E and 95041' 32'' E longitudes and 270 05' 27'' N and 270 57' 16'' N latitudes, the district covers an area of 3237 Sq. Km and is a basically plain area lying at an altitude of 104 m above the Mean Sea Level.