Tamil Jains are ethnic-Tamils from the Indian state of Tamil Nadu, who practice Jainism, chiefly the Digambara school. The Tamil Jain is a microcommunity of around 85,000, including both Tamil Jains and north Indian Jains settled in Tamil Nadu. They are predominantly scattered in northern Tamil Nadu, largely in the districts of Tiruvannamalai, Kanchipuram, Vellore, Villupuram, Ranipet and Kallakurichi. Early Tamil-Brahmi inscriptions in Tamil Nadu date to the third century BCE and describe the livelihoods of Tamil Jains. Samaṇar wrote much Tamil literature, including the important Sangam literature, such as the Nālaṭiyār, the Cilappatikaram, the Valayapathi and the Civaka Cintamani. Three of the five great epics of Tamil literature are attributed to Jains.

The Tamil people, also known as Tamilar, Tamilians, or simply Tamils, are a dravidian ethnolinguistic group who natively speak the Tamil language and trace their ancestry mainly to India's southern state of Tamil Nadu, to the union territory of Puducherry, and to Sri Lanka. The Tamil language is one of the world's longest-surviving classical languages, with over 2000 years of Tamil literature, including the Sangam poems, which were composed between 300 BCE and 300 CE. People who speak Tamil as their mother tongue and are born in Tamil clans are considered Tamils.