Sullah Upazila (Sunamganj district) with an area of 260.74 sq km, is surrounded by Derai upazila on the north, Itna and Azmiriganj upazilas on the south, Baniachang and Ajmiriganj upazilas on the east, Khaliajuri and Itna upazilas on the west. 

Main rivers are Kalni Kushiyara, Surma, Piayin, Satua; main depressions are Chhaiyar, Chakai, Varoa, Chaptar, Veramohana and Haoa haors.

Sullah (Town) located at Gungiargaon. The town consists of 2 mouzas. The area of the town is 3.79 sq km. It has a population of 2569; male 55.16%, female 44.84%; density of population is 678 per sq km. Literacy rate among the town people is 47.4%. There is a rest house in the town.

Administration Sullah thana was established in 1919 and was turned into an upazila in 1983. It consists of 4 union parishads, 68 mouzas, 114 villages.

Religious institutions Mosque 33, temple 10, place of pilgrimage 1, mazar 1 noted of which are Gungiargaon Sullah Jame Mosque, Srihail Sab Bari Jame Mosque, Sree Sree Ramkrisnan Gosai Aakhra, Sumeshwari Temple at Bahra.

Population 89941; male 51.08%, female 48.92%. Muslim 48.03%, Hindu 51.09%, Buddhist 0.26%, Christian 0.08%, and others 0.62%. 

Literacy and educational institutions Average literacy 21.8%; male 26.8%, female 16.5%. 

Educational institutions: college (private) 1, high school 4, girl's high school 1, junior high school 4, primary school (government) 48, primary school (private) 50, maktab 20, madrasa 6, satellite school 10, community school 6; Bahra Primary School (1831) is the oldest educational institution.

Newspapers and periodicals Arunadaiy and Haorer Dheow (extinct).Cultural organisations Club 12, library 1, literary society 1, music school 2.

Main occupations Agriculture 59.35%, fishing 3.93%, agricultural labourer 20.40%, commerce 3.47%, wage labourer 3.10%, service 1.34%, others 8.41%. 

Land use Arable land 19524.08 hectares, barren land 1727.64 hectares; cultivable land under irrigation about 23.46%. 

Land control Among the peasants, 53% are landless, 28.46% small, 13.20% intermediate and 5.34% rich; cultivable land per head 0.22 hectare. 

Value of land Market value of first grade arable land about Tk 1500 per 0.01 hectare. 

Main crops Rice, groundnut, potato, onion, chilli. Extinct and nearly extinct crops Til (sesame), tisi (linseed), mustard seed and aman rice. 

Main fruits Coconut, mango, jackfruit, banana and papaya. Fisheries, poultries Fishery 9, poultry 31. 

Communication facilities Roads: pucca 1.2 km and mud road 210.26 km. Traditional transport Palanquin (extinct), horse carriage and bullock cart (nearly extinct), country boat. 

Cottage industries Bamboo work 82, goldsmith 8, blacksmith 11, potteries 2, wood work 77, tailoring 6, welding 4, bakery 1. 

Hats, bazars and fairs Hats and bazars are 3, mela (fair) 1 (Sumeshwari Barani Mela). Main exports Fish. 

NGO activities Brac, HEED Bangladesh, Surma Gana Unnayan Sangstha, Palli Pragati Sangstha. 

Health centres Upazila health centre 1, union health and family welfare centre 1, satellite clinic 1; TB clinic (operated by BRAC) and leprosy treatment centre (operated by HEED Bangladesh).