The district is named after its headquarters, Lunglei. Lunglei, sometimes spelled Lungleh, in Mizo means a bridge of rock. It derived its name from a bridge like rock found in the riverine area around the Nghaish, a small tributary of the river Tlawng.
The district has 3 Subdivision Hnahthial, Lunglei and Tlabung. The district has 7 assembly constituencies. These are South Tuipui, Lunglei North, Lunglei East, Lunglei West, Lunglei South, Thorang and West Tuipui.