Chittagong Division, officially known as Chattogram Division, is geographically the largest of the eight administrative divisions of Bangladesh. It covers the south-easternmost areas of the country, with a total area of 34,529.97 km² (13,332.10 sq mi) and a population at the 2022 census of 33,202,326. The administrative division includes mainland Chittagong District, neighbouring districts and the Chittagong Hill Tracts.

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Chittagong Division চট্টগ্রাম বিভাগ
Division
Chattogram Division
Chittagong Division in Bangladesh Districts of Chittagong Division
Coordinates: 22°55′N 91°30′E
Country	Bangladesh
Established	1829
Capital and largest city	Chittagong
Government
• Divisional Commissioner	Md. Tofayel Islam[1]
• Parliamentary constituency	Jatiya Sangsad (58 seats)
Area
• Total	34,529.97 km2 (13,332.10 sq mi)
Population  (2022)[2]
• Total	33,202,326
• Density	960/km2 (2,500/sq mi)
Time zone	UTC+6 (BST)
ISO 3166 code	BD-B
Notable sport teams	Chattogram Challengers, Chittagong Division, Chittagong Abahani
Website	www.chittagongdiv.gov.bd

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Chittagong Division is home to Cox's Bazar, the longest natural sea beach in the world;^[3][4] as well as St. Martin's Island, Bangladesh's sole coral reef.

The Chittagong Division was established in 1829 to serve as an administrative headquarters for five of Bengal's easternmost districts, with the Chittagong District serving as its headquarters.^[5] In East Pakistan, the division's Tippera district was renamed as Comilla District in 1960.^{[citation needed]}

In 1984, fifteen districts were created by separating and reducing the original five districts of Chittagong, Comilla, Hill Tracts, Noakhali and Sylhet:^{[citation needed]}

• The Chittagong District was divided into two districts; Chittagong and Cox's Bazar District
• The Comilla District was split into three districts; Comilla, Brahmanbaria and Chandpur
• The Hill Tracts District was split into three districts; Bandarban, Khagrachhari and Rangamati
• The Noakhali District was divided into three districts; Noakhali, Lakshmipur and Feni
• The Sylhet District was split into four districts; Sylhet, Habiganj, Moulvibazar and Sunamganj.

Sylhet, Habiganj, Moulvibazar and Sunamganj district ceded from the Chittagong Division to join a newly-established Sylhet Division in 1995.^{[citation needed]}

Chittagong Division is presently subdivided into eleven districts (zilas) and thence into 100 sub-districts (upazilas).^[6] The first six districts listed below comprise the north-western portion (37.6%) of the division, while the remaining five comprise the south-eastern portion (62.4%), the two portions being separated by the lower (or Bangladeshi) stretch of the Feni River; the upland districts of Khagrachhari, Rangamati and Bandarban together comprise that area previously known as the Chittagong Hill Tracts.

According to the 2022 Census of Bangladesh, Chittagong Division had 7,528,333 households and a population of 33,202,326, 33.7% of whom lived in urban areas. The population density was 979 people per km². 90.11% were Muslims, 6.61% Hindus, 2.92% Buddhists, 0.22% Christians and 0.14% others.^[2]

• Divisions of Bangladesh