Kaptai () is an upazila of Rangamati District in Chittagong Division of Bangladesh. The name of the Kaptai was derived from the Tripuri word "Kaptetoima". It is said that in the past, the river was wild and full of tropical flora and fauna. Large quantities and several varieties of canes could be found along the river bank that flows from the south, upper ridge. The river reaches its estuary at the Kainsa Khyong (Karnafuli River).
Notable landmarks are the Karnaphuli Hydroelectric Power Station, the only hydroelectric power plant of Bangladesh. The Kaptai Dam, built for this purpose on the Karnaphuli River, created the Kaptai Lake, the largest man-made dam in Bangladesh.
Kaptai is located at . It has a total area 258.99 km<sup>2</sup>. Kaptai upazila is bordered by Kawkhali and Rangamati Sadar upazilas to the north, Belaichhari upazila to the east, Bandarban district to the south and Chittagong district to the west.
According to the 2022 Bangladeshi census, Kaptai Upazila had 13,118 households and a population of 55,410. 8.14% of the population were under 5 years of age. Kaptai had a literacy rate (age 7 and over) of 73.24%: 79.51% for males and 66.73% for females, and a sex ratio of 103.78 males for every 100 females. 33,985 (61.33%) lived in urban areas.
ð© Muslim majority ð¨ Buddhist majority
As of the 2022 Bangladeshi census, Kaptai upazila had a population of 55,410. The ethnic population was 24,543 (44.29%), of which Marma were 15,844, Tanchangya 6,881 and Chakma 1,246.
ð© Bengali majority ð¦ Marma majority ðª Tonchonga majority
UNO: Md. Mohi Uddin
Kaptai Upazila is divided into five union parishads: Chandraghona, Chitmorom, Kaptai, Raikhali, and Waggya. The union parishads are subdivided into 10 mauzas and 144 villages.