Via Voronoi, a graphical look at the world’s oldest and youngest countries by median age, per 2024 estimates from the CIA World Factbook:
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.
Rank Oldest Countries Median Age (Years) 1 Monaco 57 2 Saint Pierre & Miquelon* 51 3 Japan 50 4 Andorra 49 5 Italy 48 6 Saint Barthélemy* 47 7 Hong Kong** 47 8 Spain 47 9 Germany 47 10 Greece 47 N/A World 31 Rank Youngest Countries Median Age (Years) 1 Niger 15 2 Uganda 16 3 Angola 16 4 Mali 16 5 Chad 17 6 DRC 17 7 Benin 17 8 Mozambique 17 9 Guinea-Bissau 18 10 Burundi 18