An Atlas of Tribal India, the first of its kind, displays the salient features of the tribal population of India with the help of a series of maps, diagrams and photographs. The Atlas contains 188 Plates of all-India maps including a series of regional insets and portrays the distributional aspects of the tribal population, ecological setting of the tribal habitats, their socio-cultural attributes, such as linguistic/dialectal and religious affinity, sex composition and marital status, literacy levels, participation in economic activity and the structure of their workforce. The Atlas is organised into eight Sections. Plates of maps in each Section are preceded by an explanatory text, and followed by appendices containing processed data. The text highlights the theoretical questions posed by the map patterns and discusses their policy implications. An introductory chapter explains the social relevance of this exercise, and focuses on the significance of the tribal ethos within the wider and regionally diverse spectrum of India national polity. Keeping in view the crucial significance of the regional dimension in the proper understanding of the socially diverse character of the Indian polity, this attempt towards an evaluation of the geographical parameters of the tribal reality in India makes a bid to throw new light on the penumbra around the shadow zone of the opaque body of colonial anthropology. With emphasis on the regional dimension of the tribal reality and on the real variations of the tribal ecosystems and their social phenomena and employing the quantitative and cartographic methods of analysis, the Atlas will prove a powerful tool of social research dealing with the problems of tribal society in India.