Population and aging: who is growing, who is getting older
The world's most populous countries, the places with the oldest populations, and where people live longest. Population and age figures come from the World Bank (based on UN population estimates); life expectancy from Our World in Data.
Small territories often top per-person and age rankings, so each page names exactly which places are included.
Rankings and charts
Japan, Italy, US or China: Whose 65+ Share Grew Most, 1996 to 2025?
Japan: 15.2% in 1996 to 30.0% in 2025 (1.97x, +2.4% a year). Italy: 17.0% in 1996 to 25.1% in 2025 (1.47x, +1.3% a year). United States: 12.
India vs China: Whose Population Grew More, 1996 to 2025?
India: 0.980B people in 1996 to 1.464B people in 2025 (1.49x, +1.4% a year). China: 1.218B people in 1996 to 1.407B people in 2025 (1.16x, +
World's Oldest Places: Share of People Aged 65+ (2000 → 2024)
Puerto Rico's share of people aged 65+ more than doubled, from 11.6% in 2000 to 24.7% in 2024 (2.1x), the biggest jump among the places in t
Top 10 Oldest Places: Share of Population Aged 65+ (2024)
One place has more than 1 in 3 residents aged 65+: Monaco at 36.2%, 3.5x the world average of 10.2%.
Most Populated Countries: Population Race (2000 → 2024)
India added 393M people since 2000, more than the entire US population.
Top 10 Life Expectancy (2023)
Only 2.4 years separate #1 from #10 in life expectancy.