🇲🇨 Monaco has the Oldest Population in the World, Niger the Youngest 🇳🇪

What We’re Showing

This graphic shows the world’s oldest and youngest countries by median age, per 2024 estimates from the CIA World Factbook.

What is Median Age?

The median age is a single indicator of the age distribution of a population—where half the population is older and half is younger than the listed age.

Key Takeaways

Monaco and Japan—two countries with high life expectancies and low birth rates—have some of the highest median ages (50+) in the world, indicating that the population as a whole is rapidly aging.

Conversely, many countries in Africa have lower life expectancies and higher birth rates, which results in the opposite phenomenon of low median ages.