1. The document provides demographic data from the 2011 census of India, including population statistics by state, religious demographics, literacy rates, and linguistic demographics. 2. The population of India was over 1.2 billion in 2011, with Uttar Pradesh being the most populous state and Hindi being the most spoken language. 3. Hindus made up nearly 80% of the population according to religious demographics, and literacy rates varied widely between states, from over 90% in Kerala to under 70% in several large states.