Hazaribagh Sadar subdivision is an administrative subdivision of the Hazaribagh district in the North Chotanagpur division in the state of Jharkhand, India.

During the period of Muslim rule, the thickly forested plateau area was ruled by big estates such as Ramgarh, Kunda, Kendi, Chai and Kharagdiha. With the East India Company acquiring the diwani of Bengal, Bihar and Odisha in 1765, it derived the right to collect revenue from the estates of Ramgarh, Kharagdiha, Kendi and Kunda. After the Kol uprising in 1831, the British changed the administrative structure of the area. The parganas of Ramgarh, Kharagdiha, Kendi and Kunda were made a part of the South West Frontier Agency and formed into a division named Hazaribagh with Hazaribagh as the administrative headquarter. In 1854 the designation of the South West Frontier Agency was changed to Chutia Nagpur and it began to be administered as a non-regulation province under the Lt. Governor of Bihar.

Hazaribagh district is divided in to two subdivisions – Hazaribagh Sadar and Barhi. There are 16 CD blocks and 15 revenue anchals with 1 statutory town, 16 census towns, 1308 villages and 257 are gram panchayats in the district.

Details of the subdivision are as follows:

Note: Data calculated on the basis of census data for CD blocks and may vary a little against unpublished official data.

According to the 2011 Census of India data, Hazaribagh Sadar subdivision, in Hazaribagh district, had a total population of 1,210.661. There were 623,236 (51%) males and 587,425 (49%) females. Scheduled castes numbered 205,973 (17.01%) and scheduled tribes numbered 105,076 (8.68%). Literacy rate was 70.91% (for the population below 6 years).

See also – List of Jharkhand districts ranked by literacy rate

Police stations in Hazaribagh Sadar subdivision are at: