Countries with Youngest Population 2025
The world's youngest populations are concentrated in Sub-Saharan Africa, where median ages below 18 mean half the population hasn't yet entered the workforce — representing either the 21st century's greatest economic opportunity or its biggest challenge.
Data & analysis
- Central African Republic — 47.72
- Nigeria — 55.18
- Chad — 56.00
- Somalia, Fed. Rep. — 56.55
- South Sudan — 56.94
- Lesotho — 58.13
In 2025, the nations with the youngest demographic profiles, as measured by the lowest life expectancies, are overwhelmingly concentrated in Sub-Saharan Africa. The Central African Republic leads the ranking at 47.7 years, followed by Nigeria at 55.2 years, a stark gap of nearly eight years between the two most extreme values. This cluster is bound by a confluence of structural vulnerabilities: persistent armed conflict, weak public health infrastructure, high maternal and infant mortality, and endemic infectious diseases such as malaria and HIV/AIDS. A primary structural reason these nations lag is the scarcity of clean water and sanitation, which drives preventable diarrheal deaths among children under five. Over the next decade, the leaderboard could be reshuffled by sustained investment in primary healthcare, widespread vaccination campaigns, and climate-resilient agriculture that reduces famine risk, though political instability remains a formidable barrier to progress.
Key Takeaways
- Niger has the world's youngest population, with a median age around 15 and a fertility rate near 7 children per woman.
- Sub-Saharan Africa accounts for nearly all countries with median ages below 20.
- A "youth bulge" can drive economic growth (as in East Asia's miracle) OR create instability (if job creation fails to keep pace).
- Life expectancy is used as a proxy here: countries with the lowest life expectancy tend to have the youngest demographic profiles.