Trishal Upazila (Mymensingh district) with an area of 338.98 sq km, is surrounded by Mymensingh Sadar upazila on the north, Bhaluka and Gaffargaon upazilas on the south, Ishwarganj, Nandail and Gaffargaon upazilas on the east, Fulbaria upazila on the west. 

Main rivers are Old Bhramaputra, Khiru, Sutia, Meduari, Nageshwari, Pagria and Barera; notable depressions: Beel Galhar, Shukni, Singaduli, Durbachora and Kumuria. 

Trishal (Town) consists 9 wards and 11 mahallas. The area of the town is 25.39 sq km. It has a population of 24306; male 52.41%, female 47.59%; density of population is 957 per sq km. The literacy rate among the town people is 33.5%. It has a dakbungalow. 

Administration Trishal thana was established in 1909 and was turned into an upazila in 1983. The upazila consists of 12 union parishads, 91 mouzas, 160 villages. 

Historical events During the War of Liberation 11 freedom fighters were killed in a battle with the Pak army at Rayergram. In another battle at Katakhali Bazar about fifty members of the Pakistan army were killed. Freedom fighter Abdur Rahman was killed in a battle at Bhangnamari Char. 

Archaeological relics and heritage Single-domed Jami mosque at Darirampur (Mughal period), archaeological relics such as well and boundary wall of the Rajbari and a bridge at village Sankibhanga.

Population 336797; male 52.36%, female 47.64%; Muslim 96.58%, Hindu 3.12%, Christian 0.15% and ethnic nationals 0.15%. 

Religious institutions Mosque 421, temple 35, place of pilgrimage 2 and tomb 3. 

Literacy and educational institutions Average literacy 25.2%; male 29.7% and female 20.4%. 

Educational institutions: university 1, college 3, technical college 1, high school 31, junior high school 6, vocational school 1, madrasa 170, government primary school 120, non-government primary school 42, community school 10, satellite school 10, kindergarten 5. 

Noted educational institutions are Nazrul College (1967), Trishal Mohila College (1990), Trishal Abbasia Senior Madrasa (1931), Darirampur High School 1913 (Nazrul Academy). 

Locally published newspapers and periodicals Daily Bishsher Mukhapatra, monthly Banglar Mukhapatra and weekly Trishal Barta. 

Cultural organisations Club 90, library 10, playground 21, cinema hall 4 and women's organisation 1. 

Main occupations Agriculture 52.69%, forestry and fishing 1.12%, agricultural labourer 20.06%, wage labourer 2.78%, commerce 9.99%, service 3.54%, others 9.87%. 

Land use Total cultivable land 23576.49 hectares, fallow land 978.35 hectares; single crop 8.6%, double crop 86% and treble crop land 17.5%; land under irrigation 52.8%.

Value of land The market value of the land of the first grade is Tk 6000 per 0.01 hectare. 

Main crops Paddy, jute, wheat, vegetables. Extinct or nearly extinct crops Indigo, linseed, sesame, carpus and sugarcane. 

Main fruits Jackfruit, mango, banana, lemon, coconut, jam, papaya, olive. 

Fisheries, dairies, poultries Fishery 7, live stock 12, dairy 5, poultry 89 and hatchery 1. 

Communication facilities Roads: pucca 22.92 km and mud road 644; railway 16.25 km; waterways 16 nautical mile 

Traditional transport Palanquin (extinct), bullock cart and horse carriage (nearly extinct), boat. 

Manufactories Rice mill 37, ice factory 29, saw mill 25, biscuit factory 5 and bidi factory 1. 

Cottage industries Weaving 78, goldsmith 65, wood work 205, welding 30, bamboo work 290, potteries 58, ghani 666, lathe machine 8 and bidi 3. 

Hats, bazars and fairs Hats and bazars are 27, most noted of which are Trishal, Balipara, Dhala, Kalirbazar, Porabari, Kashiganj, Dhanikhola, Chakrampur, Bagarbazar and Katakhali. 

Main exports Rice, banana, sugarcane molasses, cottage materials. 

NGO activities Operationally important NGOs are BRAC. ASA, GRAMEEN BANK, ITCL, Delta Nayan Foundation, Palli Unnayan Academy, Shoshi Foundation. 

Health centres Upazila health complex 1, satellite clinic 4, family planning centre 2.