Sex composition of the human population is one of the basic demographic characteristics of any society. Changes in the sex composition largely reflect the underlying socio-economic and cultural patterns of society in different ways. It is primarily determined by past fertility, mortality and migration rates. Moreover, it plays crucial role in deciding the future vital events such as births, deaths, migration, marriage, population growth and workforce etc. Hence, it received major attention by planners, policy-makers, social activities and others. The paper is aimed at examining the variations in sex ratios of India based on secondary collected from census of India, 2011 and civil registration system. Differences in sex ratios are observed by residence, age-group, religion and sex ratio at birth in India and bigger states.