(1) Indo-Gangetic Plains Explanation: More than one-fifth (21.09 per cent) of the total Scheduled Caste population of the country is found in Uttar Pradesh, followed by West Bengal (11.07 per cent), Bihar (7.83 per cent), Andhra Pradesh (7.40 per cent), Tamil Nadu (7.12 per cent), Maharashtra (5.93 per cent), Rajasthan (5.82 per cent), Madhya Pradesh (5.49 per cent) and Karnataka (5.14 per cent). These nine states together contribute 76.89 per cent of the Scheduled Caste population of the country.