Kaimur district is one of the thirty-eight districts of Bihar state, India. The district headquarters are located at Bhabua. Before 1991, it was part of Rohtas District, Bihar.

The district occupies an area of 3363 km² and has a population of 1,626,384 (as of 2011) with the rank of 307th in the country. The district has a Literacy rate of 69.34% (392nd in the country). Kaimur district is a part of Patna division. It is the westernmost district of Bihar, western point of Bihar called Chand is situated on the Bhabua-Chandauli road. The district has 18 Colleges, 58 High Schools, 146 Middle Schools and 763 Primary Schools. The district has a total no. of 1699 villages. The district also has 120 Post Offices and 151 Panchayats.