Jamui is a district among 38 districts of Bihar state, India. The district was formed on 21 February 1991, when it was separated from Munger district. It is located at a longitude of 86° 13'E and the latitude is 24° 55'N.

Munger district is one of the thirty-eight districts of Bihar state in eastern India. The city of Munger is the administrative headquarters of this district. The district is a part of Munger Division. Its literacy rate of 73.3% is higher than the state literacy rate of 63.8%, but lower than national rate of 74.04%.