Tea-tribe (Hindi: चाय जनजाति) as a term is use to denote those active tea garden workers and their dependents who reside in labour quarters built inside 800 Tea Estates spread across Assam while "Ex-tea tribe" to those who were once active as labourers but now have left the job and labour quarters for other employment opportunities after retirement. So "Tea-tribe" and "Ex-tea tribe" are collectively used for those set of people who are the descendants of both tribal and backward caste Hindus who were brought by the British colonial planters as indentured laborers from the predominantly tribal and backward castes dominated regions of present-day
They immigrated into Assam in several phases from mid-nineteenth century to mid-twentieth century from the tribal heartland of central-eastern India.
They dominates the districts of Upper Assam including Sonitpur due to high density of tea gardens and plantations in this region. Nagpuri or Sadri is the predominantly spoken language, and this dialect of Hindi works as a lingua franca among them. The majority of the population of the community follows Folk Hinduism and Sarna while Christianity is followed by about 15% of the population.
Major festivals celebrated by the community are Durga Puja, Diwali, Tusu Puja, Holi, Karam (festival), Sohrai, Sarhul, Nowakhai, Good Friday and Christmas. Jhumur dance' is a famous folk dance form of the Tea-tribe community through which they are identified with in Assam.