According to the United Nations, the estimated population of India as of 2023 is 1.4 billion.

Bihar is the most densely populated state in India, with a population density of over 1,100 people per square kilometer.

The sex ratio in India, according to the 2011 census, was 940 females per 1000 males.

The age group of 0-14 years constitutes the largest proportion of India's population, with over 25% of the total population.

The main objective of the National Population Policy of India is to reduce the population growth rate, improve the quality of life of the population, and promote sustainable development.

Arunachal Pradesh is the least densely populated state in India, with a population density of less than 20 people per square kilometer.

The current Total Fertility Rate (TFR) in India is estimated to be around 2.1, which is close to the replacement level.

Kerala has the highest literacy rate in India, with over 95% of the population being literate.

The main causes of population growth in India are a high birth rate, a low death rate, and immigration.

Kerala has the highest sex ratio in India, with over 1,084 females per 1000 males.

India faces several challenges due to its rapid population growth, including providing adequate food and resources, creating employment opportunities, and ensuring access to education and healthcare.

Bihar has the lowest literacy rate in India, with less than 60% of the population being literate.

The main objective of the family planning program in India is to reduce the birth rate, improve maternal and child health, and promote gender equality.

Uttar Pradesh has the highest population growth rate in India, with an annual growth rate of over 2%.