Manbhum District was one of the districts of the East India during the British Raj.^[3] After India's independence, the district became a part of Bihar State. Upon the reorganization of the Indian states in the mid-1950s, the Manbhum district was partitioned based on language. The Bengal-speaking areas were included in West Bengal, while the rest were kept with Bihar (present-day Jharkhand).

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Manbhum
1833–1947
District map of Bengal administration
Capital	Manbazar Purulia[1]
Area
• 1833	20,449 km2 (7,895 sq mi)
• 1901	10,741 km2 (4,147 sq mi)
Population
• 1901	1,301,364[2]
• 1931	1,810,890
History
• Formation	1833
• Accession to the Union of India as a district of Bihar	1947
• Bifurcation	1956
Today part of	West Bengal (Purulia) Jharkhand (Dhanbad, Bokaro, Ranchi, Saraikela Kharsawan, East Singhbhum)

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Manbhum gets its name from the 16th century military general Man Singh I who is known for his conquests Of Bihar, Odisha and parts of Bengal. He later also served as the governor (Subahdar) of this region during the reign of King Akbar.^[4]

In other versions, the district name derived from Manbazar or Manbhum khas parganas. The headquarters of Jangal mahal region from around 1833 to 1838, when the district was formed.^[5]

In 1833, the East India Company formed the Manbhum district with its headquarters in Manbazar, covering an area of 7,896 square miles, by dividing the Jungle-Mahal region to enhance administrative efficiency. In 1838, the headquarters shifted to Purulia, and over the following years, the district underwent several divisions. These divisions occurred in 1845, 1846, 1871, and finally, in 1879, reducing its size to 4,112 square miles. In 1901, the district area was 4,147 square miles, inhabited by a population of 1,301,364.^[2] In 1912, Manbhum became a part of the Bihar and Orissa Province.

On 1 April 1936, the Bihar and Orissa Province was partitioned into two separate provinces Bihar and Orissa based on language, though Manbhum continued to remain a part of Bihar. Post-independence, linguistic tensions emerged in the district due to imposition of Hindi language over the native Bengali-speaking majority. This led to the establishment of the "State Reorganization Commission" on December 23, 1953. The commission recommended the creation of a new district named "Purulia," primarily for Bengali speakers, by carving it out of the former Manbhum district in Bihar. The proposed Purulia district included 19 police stations from Manbhum, while 10 police stations from the Dhanbad sub-division and 2 police stations from the Purulia sub-division of Manbhum remained in Bihar.

Subsequently, three police stations of West Bengal —Ichagarh, Chandil, and Patamda—were transferred to Bihar upon a special request from TISCO, Jamshedpur. The "Bengal-Bihar Border Demarcation" Bill was passed in Parliament on August 17, 1956, and in Rajya Sabha on August 28, 1956, ultimately receiving the signature of the President of India on September 1, 1956. Consequently, on November 1, 1956, Purulia officially became a part of West Bengal, comprising 16 police stations, covering an area of 2,007 square miles (5,200 km²), and hosting a population of 1,169,097. However, other areas, including Ichagarh, Chandil, and Patamda, continued to remain under the jurisdiction of Bihar, with the former two became part of Saraikela, while Patamda (an area used to under the Barabhum police station) became part of Dhalbhum (presently East Singhbhum district). Furthermore, on November 15, 2000, South Bihar was bifurcated to form a separate state called Jharkhand due to demographic disparities between North Bihar and South Bihar. Today, these areas form parts of the Dhanbad, Bokaro, Ranchi, Saraikela Kharsawan and East Singhbhum districts in Jharkhand.

As of the 1931 census, the Manbhum district recorded a total population of 1,810,890, with 940,009 males and 870,881 females. In terms of linguistic diversity, Bengali constituted the majority with 1,222,689 individuals, followed by Hindustani speakers at 321,690 (including Kurmali)^[6] and the Santhali at 242,091. Other noteworthy linguistic groups encompassed Koda (4,623), Bhumij (2,918), Gujarati (1,912), Kharia (1,995), Marwadi (1,774), Odia (1,563), Karmali (1,568), Telegu (1,332), Kurukh (946), Naipal (662), Punjabi (661), Mundari (789), Tamil (525), Mahali (312), and Ho (57).^[7]

In terms of social demographics, the Kuṛmi comprised the largest percentage at 17.84%, followed by Santal at 15.59%. Other significant caste groups include Bauri (6.7%), Bhumij (5.74%), Brahman (4.58%), Kumhar (3.15%), Jolha (3.12%), Teli (2.68%), Goala, Ahir and Yadav (2.26%), Rajwar (2.15%), Kamar (1.95%), Bhuiya (1.86%), Rajput (1.7%), Hajam/Nai(1.38%), Dom (1.36%), Hari (1.15%), Ghatwar (0.98%), Mochi (0.94%), Kora (0.86%), Kayastha (0.8%), Dhobi (0.79%), Kahar (0.78%), Tanti (0.65%), Mahli (0.6%), Bania (0.56%), Koiri (0.54%), Chamar (0.51%), and Kewat (0.5%).^[7]

• Jungle Mahals
• Bengali Language Movement (Manbhum)
• Bihar and Orissa Province