Tangail is a district (zila) in the central region of Bangladesh. In 1969, Tangail district was created by Tangail Mohokuma from its 237 square kilometers of land and 3177 square kilometers of land acquired from Mymensingh district. It is the largest district of Dhaka division by area and second largest by population. The population of Tangail zila is about 4 million and its area is 3,414.28 square kilometres (1,318.26 sq mi). The main city of the district is Tangail. It is surrounded by Jamalpur District on the north, the Dhaka and Manikganj Districts on the south, Mymensingh and Gazipur on the east, and Sirajganj on the west.

Tangail is a city of Tangail District in central Bangladesh. A significant city in Bangladesh, Tangail lies on the bank of the Louhajang River, 83 kilometres (52 mi) northwest of Dhaka, the nation's capital. It is the 25th most populous city in Bangladesh.