Population

Story hook

On 14 April 2023, the UN Population Fund (UNFPA) published its World Population Dashboard. Buried in the data was a single number that ended a 200-year-old global ordering: India's population was estimated at 1.4286 billion, surpassing China's 1.4257 billion. For the first time since record-keeping began, India became the world's most populous country. China had been first since at least 1750 — before steam engines, before Mughal decline, before the British colonial census of 1872. Now, on a Friday afternoon in 2023, that flipped.

The transition was visible in the demographics: China's working-age population had peaked in 2014 and is shrinking by 6 million per year. India's is still growing — projected to peak around 2050. This is India's demographic dividend: a 30-year window (approximately 2010-2040) in which the working-age population exceeds the dependent population at a ratio India will never see again.

But the headline conceals deep complexity. Kerala has a Total Fertility Rate (TFR) of 1.5 (sub-replacement, like Italy or Spain), while Bihar has 3.0 (well above replacement). Kerala's literacy is 94%, Bihar's 62%. UP alone (240 million) has more people than Brazil. Sex ratio at birth has improved from 914 (2011) to 933 (NFHS-5, 2019-21) but remains skewed against girls. The 2011 Census is now 15 years old — India should have had the 2021 Census but it has been postponed; the 2026 Census is underway. India is not one population — it is several, overlapping.

This file maps the canonical numbers — distribution, growth, sex ratio, literacy — that UPSC tests every year, plus the underlying patterns and policy debates.

Why this matters for UPSC

Population data appears in GS-I (Indian society, geography) and GS-II (governance — Census, women & children) routinely. Prelims has tested specific numbers (TFR, literacy, sex ratio) in 2014, 2017, 2019, 2021, 2022, 2024. Mains demands analytical depth on demographic dividend, gender inequality, regional disparity. Interview boards probe demographic dividend vs disaster and migration politics.