The Santal (or Santhal) are an Austroasiatic-speaking Munda ethnic group of the Indian subcontinent. They constitute the largest tribal community in the Indian states of Jharkhand and West Bengal, and are also present in Odisha, Bihar, Assam, and Tripura. They are the largest ethnic minority in northern Bangladesh's Rajshahi Division and Rangpur Division. They have a sizeable population in Nepal. The Santals speak Santali, the most widely spoken language of the Munda subfamily of Austroasiatic languages.

Santal is most likely derived from an exonym. The term refers to inhabitants of Saont in erstwhile Silda in Medinapore region in West Bengal. The Sanskrit word Samant or Bengali Saont means plain land. Their ethnonym is Hor Hopon ("child of human").

According to linguist Paul Sidwell, Austro-Asiatic language speakers probably arrived on the coast of Odisha from Indochina about 4,000–3,500 years ago (c. 2000 – c. 1500 BCE). The Austroasiatic speakers spread from Southeast Asia and mixed extensively with local Indian populations.

Due to the lack of significant archaeological records, the original homeland of the Santhals is not known with certainty. The folklore of the Santhals claims they came from Hihiri, which scholars have identified as Ahuri in Hazaribagh district. From there, they claim, they were pushed onto Chhota Nagpur Plateau, then to Jhalda, Patkum and finally Saont, where they settled for good. According to Dalton, where they were renamed to Santal from cluster name Kharwar. This legend, which has been cited by several scholars, has been used as evidence that the Santals once had a significant presence in Hazaribagh. Colonial scholar Colonel Dalton claimed in Chai there was a fort formerly occupied by a Santal raja who was forced to flee when the Delhi Sultanate invaded the territory.

In the latter half of the 18th century, the Santals entered the historical record in 1795 when they are recorded as "Soontars". During the Bengal Famine of 1770, the drier western and southwestern parts of Bengal, especially the Jungle Mahals region, were some of the worst-hit areas and were significantly depopulated. This depopulation resulted in a significant loss of revenue for the East India Company. Therefore, when the Permanent Settlement was enacted in 1790, the Company looked for agriculturalists to clear the lands. British officials turned their attention to Santals, who were ready to clear the forest for the practice of settled agriculture. In 1832, a large number of area of the Raj Mahal hills demarcated as Damin-i-koh. Santal from Cuttack, Dhalbhum, Birbhum, Manbhum, Hazaribagh migrated and started cultivating these lands as peasants sponsored by landowners and the British who were desperate for labour. Under British direction, Santals took loans from non-Santal moneylenders to buy iron tools, seed grain and oxen as individuals and families, rather than groups as was their custom for working the land.

When they arrived in Damin-i-koh (present day Santal Pargana), the British provided no protection for the Santals against the preexisting Mal Paharias, who were against destruction of forest, were known raiders of the plains areas and had only recently been partially "pacified". Eventually, the Santals, with their better technology and ability to match the Paharia's guerrilla attacks, managed to drive them out. They clear the forest tracts and started cultivation in these areas. Their settlement took place between the 1830s and 1850s: in 1830, the area was home to only 3,000 Santals, but by the 1850s, 83,000 Santals had settled in the land and had turned it into paddy fields. This resulted in a 22 times increase in Company revenue from the area.

However, as they became more agricultural, the Santals were exploited by the zamindars. Unlike the Santals, the British valued individual competition instead of cooperation, and had a rigid system of laws very different from the relatively relaxed norms of the village council, the highest form of government most Santals knew. Mahajans from Bengal and Baniyas from Bihar began selling goods from elsewhere, and many Santals, seeing them as exotic, were tricked into debt to buy them, usually with a mortgage on their land. When the Santals were unable to pay the moneylenders back, they became owners of the land and the Santals became dispossessed landless peasants. The Baniya merchants and other outsiders also began to treat Santals as outcastes in a Brahminical system.

Eventually, these acts of exploitation, combined with British tax policies and corrupt tax collectors, deteriorated to the point where Santals grew discontented. In 1855, they revolted in the Santal rebellion, better known as the Santal Hul. 30,000 Santals, led by Sidhu and Kanhu Murmu, attacked the zamindars and other outsiders (dikkus) who had made their lives so miserable, as well as the British authorities. Eventually, around 10,000 British troops managed to suppress the rebellion. Although the rebellion's impact was largely overshadowed by that of the Indian Rebellion of 1857, the impact of the Santhal Rebellion lives on as a turning point in Santhal pride and identity. This was reaffirmed, over a century and a half later with the creation of the tribal province in the Republic of India, Jharkhand. Following the rebellion, the British satisfied all Santhal demands, due to their importance as a tax-paying group. The British created a 5000 km² area, called Santal Parganas, where the normal procedures of British India did not apply. Administration of the community was primarily made the responsibility of the village headman, or pradhan, who was also given the power to collect taxes. It was made illegal for Santals to transfer land to non-Santals, allowing them to have legal rights over their land.