Median Age by Country
The world's median age climbed to 30.6 years in 2024, up from roughly 22 in 1950, as falling fertility and rising longevity reshape the global age structure. Europe (42.5 years) and Japan (49.4) sit at the old end, while Niger (15.2) and much of Sub-Saharan Africa remain strikingly young. These figures come from the United Nations World Population Prospects 2024 medium-variant estimates and projections.
Key Median Age Insights
The world keeps getting older
The global median age has risen from about 22 years in 1950 to 30.6 in 2024, and the UN projects it will reach roughly 36 by 2050 and 42 by 2100. The pace accelerated after 2000 as large generations aged and birth rates fell across most of the world.
East Asia and Europe lead the ageing
Japan's median age of 49.4 years is the highest of any large country, with Italy at 48.4 and much of Southern Europe and East Asia close behind. Tiny Monaco tops the global list at around 57.5 years. Europe as a whole sits at 42.5 years, the oldest region on Earth.
Africa stays young
Niger has the world's youngest population at a median age of just 15.2 years, followed by the Central African Republic, Chad and Mali, all near 16. Africa's regional median is 20.6 years — barely half the European figure — driven by persistently high fertility.
A widening generational gap
The spread between the oldest and youngest countries now exceeds 40 years. As ageing societies face shrinking workforces and youthful ones face job-creation pressure, median age has become a key signal of each country's coming dependency and growth challenges.
Oldest Countries by Median Age (2024)
The countries and territories with the highest median age in 2024, led by Monaco and Japan, with Italy, Hong Kong and Southern Europe close behind.
Key Finding: Monaco (57.5) and Japan (49.4) have the world's oldest populations, with most of the top ranks held by East Asia and Southern Europe.
Youngest Countries by Median Age (2024)
The countries with the lowest median age in 2024, all in Sub-Saharan Africa, where high fertility keeps populations very young.
Key Finding: Niger (15.2) is the world's youngest country, with the Central African Republic, Chad and Mali all near 16 years.
World Median Age Over Time (1950–2100)
The global median age from 1950 with the UN medium-variant projection to 2100; the dashed segment marks projected years beyond 2024.
Key Finding: The world's median age rose from about 22 in 1950 to 30.6 in 2024 and is projected to reach 36 by 2050 and 42 by 2100.
Median Age by Region (2024)
Median age across world regions in 2024, from the oldest (Europe) to the youngest (Africa), with the world average shown for reference.
Key Finding: Europe's median age (42.5) is more than double Africa's (20.6), a 22-year gap between the oldest and youngest regions.
Ageing Trajectories: World, Japan and Niger
How median age has diverged since 1990 for the world average against an extreme old country (Japan) and an extreme young one (Niger), with projections to 2050.
Key Finding: Japan is on track to reach 54 years by 2050 while Niger stays under 18, even as the world average climbs toward 36.
Understanding Median Age Data
What median age means
The median age is the age that divides a population into two equal halves: half of all people are younger than this age and half are older. Unlike the average age, it is not skewed by very old or very young outliers, which makes it a robust single-number summary of a population's age structure. A median age of 30.6, the world figure for 2024, means half of humanity is under 30.6 years old.
Why median age is rising
Median age increases through two forces working together. Falling fertility means each new generation is smaller relative to the ones before it, so the young base of the population shrinks. Rising life expectancy means more people survive into older age, swelling the upper end. The combination — the classic demographic transition — has lifted the world median from roughly 22 in 1950 toward 31 today, and far higher in countries that moved through the transition early.
What it implies for dependency
A higher median age signals a shift toward more retirees relative to workers, raising the old-age dependency ratio and the burden on pensions and health systems. A very low median age, by contrast, points to a large share of children and a youth dependency challenge, but also a potential demographic dividend if those young people can be educated and employed as they reach working age. Median age is therefore an early indicator of the economic pressures a country will face.
Projection caveats
Figures from 2024 onward are projections, not observations. They use the UN's medium-variant assumptions for fertility, mortality and migration; outcomes under the high- and low-fertility variants can diverge meaningfully by 2050 and widely by 2100. Near-term median ages are fairly reliable because most of the relevant people are already alive, but long-range numbers depend on births that have not yet happened and should be read as plausible central estimates rather than forecasts.