According to the 2011 Bangladesh census, Trishal had a population of 419,308. Males constituted 49.76% of the population and females 50.24%. Muslims formed 97.23% of the population, Hindus 2.70%, Christians 0.02% and others 0.05%. Trishal had a literacy rate of 40.02% for the population 7 years and above. At the 2001 Bangladesh Population Census,Total Population 372,498; male 190,428, female 182,070; Muslim 361,731, Hindu 10,340, Buddhist 16, Christian 15 and others 396. At the 1991 Bangladesh Population census, Trishal had a population of 336,797, of whom 158,390 were aged 18 or older. Male 171,664 Female 165,133. Males constituted 50.97% of the population, and females 49.03%. Trishal had an average literacy rate of 25.2%, against the national average of 32.4%. In 2001 Trisal has population of 372,498. Male 190,428 and Female 182,070. Household 79,941 and Literacy rate 40.2%.
Administration
Trishal has Municipality 01, Ward 09, Mahallah 12, Unions 12, Mauzas 91, and Villages 159.
Unions and villages
The following 12 Unions' list is given below:
Trishal Union- Area 2827 hectares, Name of Village : Aultia Golaghita, Bagan, Chikna Monohar, Konabari, Naodhar, Panch Para, Satra Para, Salimpur, Trishal
Amirabari Union- Area 2068 hectares, Name of Village : Amirabari, Baragaon, Baragaon, Gopalpur, Guziam, Narayanpur and Amira bari
Bailar Union- Area 2548 hectares, Name of Village : Bailar, Dewaniabari, Dulalbari, Hadderbhita, Kanhar, Kazir Simla, Pardhanikhola, Rudragram
Baliparar Union- Area 3113 hectares, Name of Village : Amian Dangari, Bahadurpur, Bali Para, Beara, Char Madakhali, Char Madakhali Purbai, Dhala, Ichhamati, Kalsiddha, Kazigram, Patuli
Dhanikhola Union- Area 3140 hectares, Name of Village : Dhanikhola,Sonakhali, Pajlarchar, Madhya Bhatipara, Uzan bhatipara, Charkumaria, Dakkhin Bhatipara, Samania Para, Bhawaliapara, Goysapara, jhiarpar, Palashtoli, Chopagaria,Moisertaki, Katakhali,
Harirampur Union- Area 2380 hectares, Name of Village : Nighor kanda, Chauladi, Golabhita, Harirampur, Magurjora, Rayer gram & South Kanda.
Kanihari Union- Area 3120 hectares, Name of Village :Baraigaon, Bahalikanda, Polashtoly, Baghadaria, Baghadaria Dak, Balidia, Barma, Bearta, Chandbari, Deopara, Gobindapur, Garpara, Jilki, Kanihari, Kushtia, Kushtia, Mandatia, Raghab Bari, Sultanpur, Thapanhala, Tirkhi,
Kanthal Union- Area 2364 hectares, Name of Village : Baniadhala, Banpathalia, Dhala Amian, Jasiddhar, Kanthal, Muhuriabari, Nalchira, Rajabari, Bangram, Singrail
Mathbari Union- Area 3766 hectares, Name of Village : Alahari, Badamia, Kuragacha, Khagati Para, Horiyagoni, Mathabari
Mukshapur Union- Area 2836 hectares, Name of Village : Kaitarbari, Konabakhai, Lalpur, Mukshapur, Nijbakhai, Phuti, Shankibhanga, Sapkhali,senerchak, jamtoli
Rampura Union- Area 2827 hectares, Name of Village : Darila, Kakchar, Rampura
Sakhua Union- Area 1752 hectares, Name of Village : Akhrail, Babupura, Bishnupur, Gandakhola, Nagarchhara, Naopara, Sakhua