Patna district is one of the thirty-eight districts of Bihar state in eastern India. Patna, the capital of Bihar, is the district headquarters. The Patna district is a part of Patna division. The Patna district is divided into 6 Sub-divisions (Tehsils) i.e. Patna Sadar, Patna City, Barh, Masaurhi, Danapur and Paliganj. As of 2011, it is the most populous district of Bihar and fifteenth most populous district in India. The revenue district of Patna comes under the jurisdiction of a District Collector (District Magistrate). The office of the Patna DM is in Patna Collectorate.