According to the United Nations data, India has surpassed China to become world's most populous nation with 142.86 crore population. China has a population of 142.57 crore.
United Nations Population Fund (UNFPA) released data in the 'State of World Population Report, 2023'.
As per demographic data, There is a difference of 2.9 million people between India and China. Half of the population is under the age of 30 in India.