Arunthathiyar is a scheduled caste community mostly found in the Indian state of Tamil Nadu. The term has two distinct usages: for the purposes of the state government's positive discrimination program, in 2009 it was designated an umbrella term for the Arunthatiyar, Chakkiliyar, Madari, Madiga, , Thoti and Adi Dravida communities; while the Office of the Registrar-General, which administrates the census of India, does not recognise all of those communities as one.