Kaptai Upazila (Rangamati district) with an area of 259 sq km, is surrounded by Rangamati and Kawkhali (Rangamati) upazilas and Kaptai Lake on the north,Rajasthali upazila on the south, Belaichari and Rajasthali upazilas on the east, Rangunia upazila on the west. 

Main river is Karnafuli; Kaptai lake is notable.

Kaptai (Town) consists of two mouzas. The area of the town is 126.91 sq km. The town has a population of 37720; male 57%, female 43%. Literacy rate among the town people is 25.5%. The town has one dakbungalow.

Administration Kaptai thana was established in 1976 and was turned into an upazila in 1985. It consists of 4 union parishads, 9 mouzas and 144 villages.

Population 60185; male 57.97%, female 42.03%; Muslim 62.78%, Hindu 5.95%, Buddhist 30.48% and others 0.79%. 

Literacy and educational institutions Average literacy 22.8%; male 28.7% and female 13.6%. 

Educational institutions: college 1, high school 5, technical school 1, primary school 100.

Main occupations Agriculture 14.89%, agricultural labourer 5.82%, wage labourer 3.12%, commerce 7.62%, service 26.08%, forestry 2.4%, industry 26.24% and others 13.83%.

 Land use Forestry 188.06 sq km, cultivable and residential land 70.94 sq km.

Land control Absolute land ownership belongs to the state; but public enjoy the right on the basis of possession. 

Main crops Paddy, hilly potato, cotton, ginger, and vegetables. 

Main fruits Jackfruit, banana, pineapple, coconut, lemon. 

Manufactories Chandraghana Paper Mill, Rayon Industry, Kaptai Hydro-Electric Project. 

Main exports Banana, ginger, jackfruit, bamboo & cane product, electricity, cotton. 

Health centres Upazila health complex 1, kaptai project hospital, christian missionary hospital.