Sonagazi Upazila (Feni district) with an area of 235.07 sq km, is surrounded by Feni Sadar upazila on the north, Companiganj (Noakhali) upazila on the south, Mirsharai upazila on the east, Companiganj and Daganbhiyan upazilas on the west. 

Main rivers are Feni and Little Feni. 

Sonagazi (Town) consists of two mouzas. The area of the town is 2.09 sq km. The town has a population of 4905; male 51.62% and female 48.38%; population density per sq km 2346. Literacy rate among the town people is 45.4%. The town has one dakbungalow. 

Administration Sonagazi thana was established in 1920 and was turned into an upazila in 1983. The upazila consists of 9 union parishads, 94 mouzas and 93 villages.

Historical events During the War of Liberation five Pakistani soldiers were killed by mine explosion planted by the freedom fighters near a culvert at village Satbaria. The agitated Pakistani soldiers plundered and set on fire villages like Box Ali, Sujapur and Das Gram; they also killed five villagers instantly.

Marks of the War of Liberation Memorial monument 8. Religious institutions Mosque 276 and temple 3. 

Population 215122; male 49.80%, female 50.20%; Muslim 91.33%, Hindu 8.57% and others 0.1%; ethnic nationals: 9 Tripura families. 

Literacy and educational institutions Average literacy 32.2%; male 40.1% and female 24.6%. 

Educational institutions: college 2, high school 17, junior high school 3, government primary school 76, non-government primary school 17, community school 6, kindergarten 8. 

Noted educational institutions: Mongolkandi High School (1925) and Nawabpur High School (1923). 

Locally published newspapers and periodical Upakul.

Cultural organisations Public library 2, club 30, women's organisation 14 and playground 20. 

Main occupations Agriculture 39.74%, fishing 1.05%, transport 2.44%, agricultural labourer 14.66%, wage labourer 2.77%, commerce 9.6%, service 16.91%, industry 1.56%, construction 1.06% and others 10.21%.

Land use Total cultivable land 46836.61 hectares; fallow land 2598.94 hectares; single crop 56%, double crop 30% and treble crop land 14%. Cultivable land under irrigation 12%.

Land control Among the peasants, 12% are landless, 58% small, 12% intermediate and 18% rich; cultivable land per head 0.54%. 

Value of land The market value of the land of the first grade is approximately Tk 25000 per 0.01 hectare.

Main crops Paddy, wheat, potato, brinjal, lentil, mustard. Extinct or nearly extinct crop Jute, sesame, linseed and arhar (one kind of pulse). 

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

Fisheries, dairies and poultries Dairy 21, fishery 7, poultry 10 and artificial breeding centre 1. 

Communication facilities Roads: pucca 52 km, semi pucca 20 km and mud road 710 km; waterways 22 nautical mile.

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

Manufactories Welding 10. Cottage industries Goldsmith 11, blacksmith 15, potteries 35, wood work 60, tailoring 45, bidi 3, hand loom 7, bamboo work 110.

Hats, bazars and fairs Hats and bazars are 27, most noted of which are Sonagazi, Baktar Munshi, Motiganj and Amir Uddin Munshi Hat; fair 2 (Sonagazi Mela and Dasher Hat Mela).

Main exports Banana, papaya brinjal and fish. 

NGO activities Operationally important NGOs are Brac, ASA, PROSHIKA, Grameen Bank, Shanirvar Bangladesh, Sheba Organisation. 

Health centres Upazila health complex 1, family planning centre 8 and satellite clinic 5.