How many people in the world are 9 years old?

Roughly 138 million, about 1.7% of the world. The UN publishes five-year groups, so this is a share of the 5 to 9 group, not a direct count.

What percentage of the world is under 9?

15% of the world's people are younger than 9, and 83% are older. The median age of the world is 30.6 (UN, 2024): half of all living people are younger than that.

What is the median age of the world?

30.6 years in 2024, by the UN's World Population Prospects. It ranges from 14.4 in the Central African Republic to 49.4 in Japan. No country has a median age this low. The youngest is the Central African Republic, at 14.4; the world's median is 30.6.

How many people are older than 9?

About 6.7 billion people are older than 9, 83% of the world. 1.2 billion, 15%, are younger, and roughly 138 million are 9 right now. The world's median age is 30.6, so 9 is in the younger half.

Percentile

15%

of the world's people are younger than 9

Age 9 = born around 2014

Children, 0 to 14UN age bands: children 0 to 14, youth 15 to 24, working age 25 to 64, older persons 65 and over. Labels for statisticians, not verdicts.

Age 9 by group

Around 9

Completed years of age, UN estimates for 2023, interpolated within five-year groups
Group	People	Share of world
Younger than you (0 to 8)	1.2 billion	15%
Your age (9)	138 million	2%
Older than you (10 and up)	6.7 billion	83%

The world by age

UN population estimates for 2023, 8.1 billion people in all
Age	People	Share	Younger than this band
0 to 9	1.3 billion	17%	<1%
10 to 19	1.3 billion	16%	17%
20 to 29	1.2 billion	15%	33%
30 to 39	1.2 billion	15%	48%
40 to 49	998 million	12%	63%
50 to 59	875 million	11%	75%
60 to 69	626 million	8%	86%
70 to 79	360 million	4%	94%
80 to 89	137 million	2%	98%
90 and over	23 million	<1%	>99%

Percentile is the share of the world's people younger than this age. “1 in X” counts the rarer side: people at or beyond this value above the median, at or under it below. Counts come from the UN's five-year age groups, spread evenly inside each group. No normal curve; the age test uses one, so its number differs by a few points.

What this means

World life expectancy at birth is 73.2 years (70.5 for men, 75.9 for women, UN). At 9 that leaves about 64 years on a crude subtraction. Real life tables give more at older ages, because you have already dodged the risks of the years before.
No country has a median age this low. The youngest is the Central African Republic, at 14.4; the world's median is 30.6.
About 138 million people are 9 right now. Standing in a line half a metre apart they would stretch 68,887 km, 1.7 times around the equator.
The counts come from the UN's five-year age groups for 2023, spread evenly inside each group. Our age test uses a normal curve with mean 30 and SD 18 instead, so its percentile differs from this one by a few points.

Questions

How many people are older than 9?: About 6.7 billion people are older than 9, which is 83% of the world's 8.1 billion. 1.2 billion are younger. Source: UN World Population Prospects 2024, 2023 estimates by five-year age group.
How many people in the world are 9 years old?: Roughly 138 million, about 1.7% of the world. The UN publishes five-year groups, so this is a share of the 5 to 9 group, not a direct count.
What percentage of the world is under 9?: 15% of the world's people are younger than 9, and 83% are older. The median age of the world is 30.6 (UN, 2024): half of all living people are younger than that.
What is the median age of the world?: 30.6 years in 2024, by the UN's World Population Prospects. It ranges from 14.4 in the Central African Republic to 49.4 in Japan. No country has a median age this low. The youngest is the Central African Republic, at 14.4; the world's median is 30.6.

Source: UN World Population Prospects 2024, population by five-year age group, 2023 estimates, via Our World in Data (fetched 2026-10-28). Life expectancy: United Nations, World Population Prospects 2024, estimates for 2023. Median ages: UN WPP 2024, for 2024. Counts come from the UN's five-year age groups, spread evenly inside each group. No normal curve; the age test uses one, so its number differs by a few points.

Your age, sex and country: how much of the world is younger, and the years the tables give you.

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