Chamar (or Jatav) is a community classified as a Scheduled Caste under modern India's system of affirmative action that originated from the group of trade persons who were involved in leather tanning and shoemaking. They are found throughout the Indian subcontinent, mainly in the northern states of India and in Pakistan and Nepal.

The Chamars are traditionally associated with leather work. Ramnarayan Rawat posits that the association of the Chamar community with a traditional occupation of tanning was constructed, and that the Chamars were instead historically agriculturists.

The term chamar is used as a pejorative word for Dalits in general. It has been described as a casteist slur by the Supreme Court of India and the use of the term to address a person as a violation of the Scheduled Caste and Scheduled Tribe (Prevention of Atrocities) Act, 1989.

Between the 1830s and the 1950s, the Chamars in the United Provinces, especially in the Kanpur area, became prosperous as a result of their involvement in the British leather trade.

By the late 19th century, the Chamars began rewriting their caste histories, claiming Kshatriya descent. For example, around 1910, U.B.S. Raghuvanshi published Shri Chanvar Purana from Kanpur, claiming that the Chamars were originally a community of Kshatriya rulers. He claimed to have obtained this information from Chanvar Purana, an ancient Sanskrit-language text purportedly discovered by a sage in a Himalayan cave. According to Raghuvanshi's narrative, Vishnu, one of the principal deities in Hinduism, once appeared in form of a Shudra before the community's ancient king Chamunda Rai. The king chastised Vishnu for reciting the Vedas, an act forbidden for a Shudra. The god then revealed his true self, and cursed his lineage to become Chamars, who would be lower in status than the Shudras. When the king apologized, the god declared that the Chamars will get an opportunity to rise again in the Kaliyuga after the appearance of a new sage (whom Raghuvanshi identifies as Ravidas).

A section of Chamars claimed Kshatriya status as Jatavs, tracing their lineage to Krishna, another major deity in Hinduism, and thus, associating them with the Yadavs. Jatav Veer Mahasabha, an association of Jatav men founded in 1917, published multiple pamphlets making such claims in the first half of the 20th century. The association discriminated against lower-status Chamars, such as the "Guliyas", who did not claim Kshatriya status.

In the first half of the early 20th century, the most influential Chamar leader was Swami Achutanand, who founded the anti-Brahmanical Adi Hindu movement, and portrayed the lower castes as the original inhabitants of India, who had been enslaved by Aryan invaders.

In the 1940s, the Indian National Congress promoted the Chamar politician Jagjivan Ram to counteract the influence of B.R. Ambedkar; however, he remained an aberration in a party dominated by the upper castes. In the second half of the 20th century, the Ambedkarite Republican Party of India (RPI) in Uttar Pradesh remained dominated by Chamars/Jatavs, despite attempts by leaders such as B.P. Maurya to expand its base.