Which has higher average age of mothers at childbirth, Kazakhstan or Tanzania?

Kazakhstan, at 28.96 years against 28.94 years in Tanzania as of 2023.

What is the difference in average age of mothers at childbirth between Kazakhstan and Tanzania?

0.02 years, with Kazakhstan ahead.

How many years of comparable data are there for Kazakhstan and Tanzania?

74 years are reported by both, from 1950 to 2023.

Where does this data come from?

Human Fertility Database (2025); UN, World Population Prospects (2024) – processed by Our World in Data, published as Average age of mothers at childbirth. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Kazakhstan vs Tanzania: Average age of mothers at childbirth

Kazakhstan

28.96 years

in 2023

Tanzania

28.94 years

in 2023

Kazakhstan rank

138th

Tanzania rank

140th

Average age of mothers at childbirth over time

Kazakhstan
Tanzania

How they compare

Kazakhstan currently reports 28.96 years against 28.94 years in Tanzania, a difference of 0.02 years.

The two have swapped places 2 times across 74 shared years of data; in 1950 it was Kazakhstan ahead.

Kazakhstan ranks 138th and Tanzania ranks 140th of 236 countries.

Across the 8 decades both report, Kazakhstan averaged higher in 2 and Tanzania in 6.

Head to head by decade

Decade	Kazakhstan	Tanzania	Difference	Ahead
1950s	29.25 years	29.09 years	0.1566 years	Kazakhstan
1960s	29.19 years	29.13 years	0.0559 years	Kazakhstan
1970s	28.43 years	29.35 years	0.9218 years	Tanzania
1980s	27.26 years	29.72 years	2.45 years	Tanzania
1990s	26.25 years	29.37 years	3.12 years	Tanzania
2000s	27.55 years	29.09 years	1.54 years	Tanzania
2010s	28.29 years	29 years	0.7158 years	Tanzania
2020s	28.89 years	28.94 years	0.0575 years	Tanzania

Averages of every year both report within each decade.

Frequently asked questions

Which has higher average age of mothers at childbirth, Kazakhstan or Tanzania?: Kazakhstan, at 28.96 years against 28.94 years in Tanzania as of 2023.
What is the difference in average age of mothers at childbirth between Kazakhstan and Tanzania?: 0.02 years, with Kazakhstan ahead.
How many years of comparable data are there for Kazakhstan and Tanzania?: 74 years are reported by both, from 1950 to 2023.
How do Kazakhstan and Tanzania rank globally for average age of mothers at childbirth?: Kazakhstan ranks 138th and Tanzania ranks 140th of 236 countries.
Where does this data come from?: Human Fertility Database (2025); UN, World Population Prospects (2024) – processed by Our World in Data, published as Average age of mothers at childbirth. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Kazakhstan vs Tanzania: Average age of mothers at childbirth. Statizoid, drawing on Human Fertility Database (2025); UN, World Population Prospects (2024) – processed by Our World in Data. Retrieved 11 October 2026, from https://reference.statizoid.com/compare/period-average-age-of-mothers/kazakhstan/tanzania/

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About this data

Indicator: Average age of mothers at childbirth
Unit: years
Source: Human Fertility Database (2025); UN, World Population Prospects (2024) – processed by Our World in Data
Licence: CC BY 4.0 (Our World in Data)
Coverage: 236 places, 17,683 data points, 1891–2023
Last refreshed: 09 October 2026

Mean age of mothers at the birth of their children if women were subject throughout their lives to the age-specific fertility rates observed in a given year.