The Chutia army under the generals Kasitora, Alangi Chetia and Borpatra fought against the Ahoms at Dibrumukh,[3] but were defeated.

[4] Since the defeat of the royalists troops at Amaratali of Dibru in 1787 A.D. in the reign of Gaurinath Singha, during the Moamoria rebellion this region came under the Moamarias who also formed there a dominant religious community.

[5] Dibrugarh district occupies an area of 3,381 square kilometres (1,305 sq mi),[6] comparatively equivalent to Russia's Vaygach Island.

The area stretches from the north bank of the Brahmaputra, which flows for a length of 95 km through the northern margin of the district, to the Patkai foothills on the south.

There is a large tract of Tropical Rainforest in its eastern and southern regions, which is a part of the Dehing Patkai wildlife sanctuary.

[8] In 2020 Dibrugarh district became home to Dehing Patkai National Park, which has an area of 231.65 km2 (89.4 sq mi).

BVFCL (Brahmaputra Valley Fertilizer Corporation Ltd.), APL (Assam Petrochemicals Ltd.) and NTPS (Namrup Thermal Power Station).

There are seven Assam Legislative Assembly constituencies in this district: Moran, Dibrugarh, Lahowal, Duliajan, Tingkhong, Naharkatia, and Chabua.

According to the 2011 census Dibrugarh district has a population of 1,326,335,[1] roughly equal to the nation of Mauritius[13] or the US state of Maine.

According to the 2011 census, 76.01% of the district speaks Assamese, 5.93% Bengali, 5.80% Hindi, 4.83% Sadri, 1.72% Nepali, 1.13% Bhojpuri and 1.00% Odia as their first language.

The Assam Medical College was established by a personal grant from Dr. John Berry White after he retired as the civil surgeon of Lakhimpur district.