Water bodies Main rivers: dharla, pasur, arpangachhia, Taldhup, Malancha, kobadak, ball; Koyra canal is notable.
History
Koyra's history most likely dates as far back as the office of Khan Jahan Ali in the 15th century at least. This is evident from the ancient mosques found in Koyra such as Masjidkur.
During the Bangladesh Liberation War of 1971, a sub-sector of Sector 9 was founded in Koyra's Amati Union known as Bachharbari-Manoranjan Camp, and so most of the Mukti Bahini's and Mujib Bahini's operations were launched from here. The Bengali freedom fighters built five camps in Koyra; World Poet Camp led by Abd al-Latif, Najmul Camp led by KM Mujibur Rahman, Nazrul Camp led by Abd al-Hakim, Narayan Camp led by Keramat Ali, Shaykh Abd al-Jalil and Shamsur Rahman in Jhileghata and the Suhrawardy Camp led by Rezaul Karim in Bamiya, Bagali Union. In Jaygirmahal, Dr Rafiqul Islam ran a secret medical centre to provide treatment to wounded freedom fighters. A mass grave was found in Launch Ghat, Marighata.
On 19 November 1979, Korya was established as a thana.[4] It was upgraded to an upazila (sub-district) on 7 November 1983.[3]
The Upazila suffered heavy damage following the Cyclone Sidr in 2007 and Cyclone Aila two years after that.
As of the 2011 Census of Bangladesh, Koyra upazila had 45,750 households and a population of 193,931. 41,026 (21.15%) were under 10 years of age. Koyra had an average literacy rate of 50.36%, compared to the national average of 51.8%, and a sex ratio of 1033 females per 1000 males. 11,594 (5.98%) of the population lived in urban areas.[6] Ethnic population was 1,243 (0.64%).[7]
^"Bangladesh Postal Code". Dhaka: Bangladesh Postal Department under the Department of Posts and Telecommunications of the Ministry of Posts, Telecommunications and Information Technology of the People's Republic of Bangladesh. 21 October 2024.