Habiganj Sadar Upazila (Habiganj district) with an area of 253.74 sq km, is surrounded by Baiachang and Nabiganj upazilas on the north, Chunarughat and Madhabpur upazilas on the south, Bahubal upazila on the east, Lakhi upazila on the west. 

Main rivers are Barak, Khowai,and Sutung. 

Habiganj (Town) consists of 9 wards and 64 mahallas. It has an area of 20.60 sq km. The town has a population of 54178; male 52.59%, female 47.41%. Literacy rate among the town people is 59.9%. 

Habiganj Town Committee was established in 1881 and it was turned into a municipality in 1913. During the British period an embankment was constructed along the Khoai to protect the town. The main business centre of the town is Chowdhury Bazar. The town has one dakbungalow. 

Administration Habiganj thana, now an upazila, was established in 1890. It consists of 2 municipalities, 18 wards, 93 mahallas, 10 unions, 202 mouzas, 259 villages. 

Population 225469; male 51.75%, female 48.25%; Muslim 88.08%, Hindu 11.59%, Buddhist 0.04%, Christian 0.03% and others 0.26%; ethnic nationals include Khasia and Manipuri. 

Religious institutions Mosque 213, temple 17, church 2, tomb 27. 

Literacy and educational institutions Average literacy 30.6%; male 36.9% and female 23.7%. 

Educational institutions: government college 2, non-government college 1, government high school 2, non-government high school 18, government primary school 93, non-government primary school 53, madrasa 8. 

Noted educational institutions: Laskarpur Primary School (1818) Mirjapur Government Primary School (1885), Fakirabad Government High School (1890), Habiganj Government Primary School (1883), Shaestaganj High School (1918), Nizampur Dakhil Madrasa (1935). 

Cultural organisations Club 65, public library 2, library 5, theatre group 5, theatre stage 1, literary society 3, women's society 5, cinema hall 3, playground 7.

Locally published newspapers and periodicals Daily Pravakar, weekly Swadhikar, Swadeshbarta, Drishtikon, Khoai, Hobiganj Samachar, Janatar Dalil, Parikrama, fortnightly Prayas and Mritika. 

Main occupations Agriculture 36.02%, agricultural labourer 16.84%, wage labourer 4.61%, commerce 14.74%, service 7.07%, transport 3.91%, fishing 2.08%, construction 1.45% and others 13.28%. 

Land use Total cultivable land 17877 hectares; khas land 1796.84 hectares; fallow land 1660 hectares; single crop 32%, double crop 40% and treble crop land 28%; cultivable land under irrigation 35%. 

Main crops Paddy, wheat, potato, jute, ground nut, pumpkin and chilli. Extinct or nearly extinct crops Linseed, kaun. 

Main fruits Mango, jackfruit, banana, litchi and black berry. 

Fisheries, dairies, poultries Dairy 33, poultry 101 and fishery 590. 

Communication facilities Roads: pucca 74 km, semi pucca 43 km and mud road 96 km; railways 27 km. 

Traditional transport Palanquin and bullock cart. These means of transport are either extinct or nearly extinct. 

Manufactories Flour mill 3, rice mill 8, chira mill 2, ice factory 2, biscuit factory 4. 

Cottage industries Weaving 60, bamboo work 325, goldsmith 85, blacksmith 73, potteries 105, tailoring 360 and welding 58.

Mineral resources Jalalabad Gas Field. 

Main hats, bazars and fairs Hats and bazars are 26, fair 5, most noted of which are Habiganj Puran Bazar, Aliganj, Katiadi, Daudnagar Bazar and Kalibari Mela. Main exports Paddy, tea, forest and bamboo goods. 

NGO activities Operationally important NGOs are BRAC, Vision, ASA 

Health centres Upazila health complex 1, family planning centre 7, satellite clinic 2 and maternity 3.