Chandanaish () is an upazila of Chattogram District in Chattogram Division, Bangladesh.
Chandanaish is one of the first inhabitant of the early settlers of Chittagong. Muslim traders and preachers from the then Islamic worlds had been settling in Chandanaish due to the close proximity of Chandanaish from the river Karnaphuli. However, the Muslim settlement was permanently established when the medieval Islamic invasion occurred in Chittagong.
Chandanaish was previously part of Patiya upazila. In 1976, Chandanaish was separated from Patiya and established as Chandanaish thana and in 1983 it became an upazila.
Chandanaish is located at . It has 44,438 households and a total area of 201.99 km<sup>2</sup>. Its west side is plainland and its east side is surrounded with the tertiary hill tracts. Here cultivable land is very fertile. Sangu is the main river but there are also small rivers and canals like Borumoti (Borguni Khal locally called), Chandkhali river etc. There are a lot of Beels such as Moga Beel, Arah Beel, Ronger Beel.
According to the 2022 Bangladeshi census, Chandanaish Upazila had 56,197 households and a population of 252,242. 10.53% of the population were under 5 years of age. Chandanaish had a literacy rate (age 7 and over) of 79.69%: 80.83% for males and 78.68% for females, and a sex ratio of 90.54 males for every 100 females. 81,713 (32.39%) lived in urban areas.
As of the 2011 Census of Bangladesh, Chandanaish upazila had 44,438 households and a population of 233,017. 55,629 (23.87%) were under 10 years of age. Chandanaish had an average literacy rate of 53.61%, compared to the national average of 51.8%, and a sex ratio of 985 females per 1000 males. 35,248 (15.13%) of the population lived in urban areas. Ethnic population was 968 (0.42%) of the population.
According to the 1991 Bangladesh census, Chandanaish had a population of 172,843. Males constituted 51.27% of the population, and females 48.73%. The population aged 18 or over was 81,653. Chandanaish had an average literacy rate of 33.9% (7+ years), compared to the national average of 32.4%.
Chandanaish Upazila is divided into Chandanaish Municipality, Dohazari Municipality, and nine union parishads: Bailtali, Barama, Barkal, Dhopachhari, Dohazari, Hashimpur, Joara, Kanchanabad, and Satbaria. The union parishads are subdivided into 44 mauzas and 46 villages.
Chandanaish Municipality is subdivided into 9 wards and 12 mahallas.
MP: Vacant
Upazila Chairman: Vacant Vice Chairman: Vacant
Female V. Chairman: Vacant
Chandnaish upazila has 2 hospitals, 2 upazila health complexes, 5 union health centers, 10 family planning centers and 10 community clinics.
The main communication road in Chandanish Upazila is Chittagong-Cox's Bazar highway. This upazila can be contacted over Barkal Bridge of Chittagong-Anwara District. Can be contacted by various types of vehicles. In addition, this upazila has of paved roads, of semi-pacara roads, of unpaved roads. This upazila also has rail communication system. There is also a communication system with other upazilas through Sangu river.
Universities
Medical colleges
Colleges
High schools
Madrasahs
Others