How many people in the world are 42 years old?

Roughly 105 million, about 1.3% of the world. The UN publishes five-year groups, so this is a share of the 40 to 44 group, not a direct count.

What percentage of the world is under 42?

65% of the world's people are younger than 42, and 33% 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. The country whose median age is closest to 42 is Lithuania, at 42.0: half the people there are younger than that. The world's median is 30.6, so 42 is 11.4 years above it.

How many people are older than 42?

About 2.7 billion people are older than 42, 33% of the world. 5.3 billion, 65%, are younger, and roughly 105 million are 42 right now. The world's median age is 30.6, so 42 is in the older half.

Percentile

65%

of the world's people are younger than 42

Age 42 = born around 1981

Working age, 25 to 64UN 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 42 by group

Around 42

Completed years of age, UN estimates for 2023, interpolated within five-year groups
Group	People	Share of world
Younger than you (0 to 41)	5.3 billion	65%
Your age (42)	105 million	1%
Older than you (43 and up)	2.7 billion	33%

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 42 that leaves about 31 years on a crude subtraction. Real life tables give more at older ages, because you have already dodged the risks of the years before.
The country whose median age is closest to 42 is Lithuania, at 42.0: half the people there are younger than that. The world's median is 30.6, so 42 is 11.4 years above it.
About 105 million people are 42 right now. Standing in a line half a metre apart they would stretch 52,379 km, 1.3 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 42?: About 2.7 billion people are older than 42, which is 33% of the world's 8.1 billion. 5.3 billion are younger. Source: UN World Population Prospects 2024, 2023 estimates by five-year age group.
How many people in the world are 42 years old?: Roughly 105 million, about 1.3% of the world. The UN publishes five-year groups, so this is a share of the 40 to 44 group, not a direct count.
What percentage of the world is under 42?: 65% of the world's people are younger than 42, and 33% 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. The country whose median age is closest to 42 is Lithuania, at 42.0: half the people there are younger than that. The world's median is 30.6, so 42 is 11.4 years above it.

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.

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