List of districts of Bihar

Bihar, a state of India, has currently thirty-eight administrative districts.

A district of an Indian state is an administrative geographical unit, headed by a district magistrate or a deputy commissioner, an officer belonging to the Indian Administrative Service. The district magistrate or the deputy commissioner is assisted by a number of officials belonging to different wings of the administrative services of the state.

A superintendent of Police, an officer belonging to Indian Police Service is entrusted with the responsibility of maintaining law and order and related issues.

3 to 5 districts comprise to form a division(प्रमंडल). Each district is divided into Sub-division(अनुमंडल), which are further sub-divided into C.D. Block(प्रखण्ड)

...
Wikipedia