Companiganj Upazila (Sylhet district) with an area of 278.55 sq km, is surrounded by Meghalaya (state of India) on the north,Sylhet Sadar, Gowainghat and Chhatak upazilas on the south, Gowainghat upazila on the east, Chhatak upazila on the west. 

Main rivers are Surma,Piyain. Notable haors: Baoa, Pokohair. Notable beels: Panichapara, Nagar, Rauti and Kalenga.

Companiganj (Town) consists only of one mouza. It has an area of 9.21 sq km. It has a population of 6365; male 54.12%, female 45.88%; density of population is 691 per sq km. Literacy rate among the town people is 15.2%. 

Administration A police outpost was established at Companiganj in 1976 which was upgraded to an upazila in 1983. The upazila consists of three union parishads, 74 mouzas and 131 villages. 

Religious institutions Mosque 130, temple 4, tomb 3. Population 85169; male 51.86%, female 48.14%; Muslim 91.16%, Hindu 8.73% and ethnic people 0.1% (Monipuri). 

Literacy and educational institutions Average literacy 43.05%; male 50.6%, female 35.5%. 

Educational institutions: college 1, secondary school 7, junior high school 3, primary school (government) 32, primary school (non-government) 27, community school 10, satellite school 6, madrasa 11. Vatrai High School (1957), Parua Noagaon Dakhil Madrasa (1965) are notable educational institutions. 

Cultural organisations Rural club 14, playground 5, women's organisation 12.

Main occupations Agriculture 45.87%, agricultural labourer 16.54%, wage labourer 9.58%, fishing 4.32%, commerce 7.01%, service 1.72%, others 14.96%.

Land use Arable land 29676.40 hectares, Khas land 999.84 hectares. 

Land control Among the peasants 51% are landless, 16% marginal, 25% intermediate and 8% rich.

Value of land Market value of the first grade agricultural land is about Tk. 2500 per 0.01 hectare.

Main crops Paddy, mustard, cassialeaf, betelleaf and betelnut.Extinct and nearly extinct crops Tobacco, ganja (hemp) are entirely extinct.

Main fruits Orange, jackfruit, mango, lemon, pineapple, satkora.Fisheries, dairies, poultries Fishery 15, dairy 20, poultry 35.

Communication facilities Roads: pucca 41.15 km and mud road 160 km.

Traditional transport palanquin and bullock cart. These means of transport are extinct of nearly extinct.

Cottage industries Weaving 20, goldsmith 40, blacksmith 30, potteries 80, welding 3.

Hats, bazars and fairs Hats and bazars are 14, fair 3; Companiganj Bazar, Islamganj Bazar, Tuker Bazar, Parua Bazar are notable.

Main exports Orange, fish, stone (boulder and pebble), limestone.

NGO activities CARE, Brac, Grameen Bank, and Simantik.

Health centres Upazila health complex 1, satellite clinic 1, family planning centre 3.