Tangail (Bengali: টাঙ্গাইল জেলা) is a district (zila) in the central region of Bangladesh. It is the largest district of Dhaka division by area and second largest by population (after Dhaka district). The population of Tangail zilla is about 3.6 million and its area is 3,414.28 km². 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, the Mymensingh and Gazipur on the east, and the Sirajganj on the west. The main rivers that cross the Tangail district are the Jamuna, Dhaleshwari, Jhenai, Bangshi, Louhajang, Langulia, Elongjani, Jugni, Pungli, Fotikjani and the Turag.