Sex ratio is important parameter for the study of demographic, socio-cultural and economic status of any region. In the present study, attempt has been made to analyse the changed phenomena of sex ratio in tribal population of Nashik district of Maharashtra state. The demographic parameter has been taken into account for the study of human resource development. Any part of the world, sex ratio has given an important place in the study of human resource development. The regions, where sex ratio is low, have posed an unpleasant problem of gender discrimination, resulting in the fall in the status of human resource.