Mymensingh is an old town which was earlier known as Nasirabad. Mymensingh was pronunced of the original name Momenshahi, which refer to a ruler called Momen Shah. At the beginning of Mymensingh district Begunbari was chosen as the headquarters of the district. But the district headquarters was relocated to Mymensingh when Begunbari devastated by flush flood. During the British Raj the town was mostly populated by Hindus. From early 20th Century Muslims moved into town.Fakir and Sannyasi revolt (1772-1790), famine (1788) and Swadeshi Movement (1905) are important events.Mymensingh town stands on the bank of Old Brahmaputra River because the 1897 great Assam Bengal earthquake changed the main flow from Brahmaputra to the Jamuna River.Mymensingh is one of the 16 old districts of Bangladesh which was constituted by the British East India Company on 1 May 1787.Visit by Edward VII in 1903,Rabindranath Tagore in 1926,Sir Samuel Baker (1899); Grand Duke Boris of Russia along with General Sir George White (1902) and Mahatma Gandhi (1926) are remarkable history of this district.Mymensing has a great history of the nine month long liberation war of Bangladesh. The killing of Biharis (in Mymensingh) is a dark spot in Bangladesh’d history. But the number mentioned 30,000 is not right. Around 450 Biharis were slaughtered on those fateful nights. in Sanki pAra Behari coloni. Mymesingh became free as the Pakistani occupation forces deserted Mymensing on 10 December and Mukti Bahini took over on 11 December, just 5 days before the victory of Dhaka on 16 December.

Maimansingh, a district of British India, is in the Dhaka division of Eastern Bengal and Assam. It occupies a portion of the alluvial valley of the Brahmaputra east of the main channel (called the Jamuna) and north of Dacca. The administrative headquarters are at Nasirabad, usually called Mymensingh town. Area, 6332 sq mi Pop. (1901) 3,915,068, showing an increase of 12.8% in the decade. The district is for the most part level and open, covered with well-cultivated fields, and intersected by numerous rivers.

In 1855, due to change in river course part or Serajganj thana was transferred from Mymensingh to Pabna and in 1866, the whole of it was transferred to Pabna. In 1866, thana Dewangajn was transferred to Mymensingh form Bogra and thana Atia from Dhaka. In 1867 for the administrative convenience boundaries of five subdivisions (including Tangail) and thanaswere notified. In 1874 on the basis of survey, the district boundaries were notified. In 1874 the Jamuna (or Daokoba) River was declared the western boundary between Mymensingh and Bogra and as such, 165 villages were transferred to Bogra. In 1875, the Brahmaputra was Made the boundary between Mymensingh and Rangpur and the portion of patiladaha, east of the river, was transferred to this district form Rangpur. In 1877, the Jamuna was declared the boundary between Pabna and Mymensingh, in the west. On the first of December, 1969, Tangail subdivision was separated from Mymensingh and a new District of Tangail was formed.