During
medieval times, the present district was under the control of the rulers of the
Chutiya Kingdom. The Chutiyas controlled the area from the early 13th century to the 16th century and during the 19th century, it became one of the last
territories to be brought under
British control after the punitive
Abor and Mishmi Expedition in the first decade of 20th century. The ruins of the hill fort
Bhismaknagar is from the Chutia period. In June 1980,
Dibang Valley district was split from Lohit (and has since been bifurcated again to create the new
Lower Dibang Valley district). On 16 February 2004,
Anjaw district was carved out from the northern part of Lohit district bordering
Tibet and
Myanmar, with its headquarters at
Hawai. Anjaw was carved out under the Arunachal Pradesh Re-organization of Districts
Amendment Bill.
Namsai was split from Lohit in 2013. ==Geography==