What is the difference in average age of mothers at childbirth between Sao Tome and Principe and Zambia?

0.03 years, with Sao Tome and Principe ahead.

How many years of comparable data are there for Sao Tome and Principe and Zambia?

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.

Sao Tome and Principe vs Zambia: Average age of mothers at childbirth

Sao Tome and Principe

28.47 years

in 2023

Zambia

28.44 years

in 2023

Sao Tome and Principe rank

171st

Zambia rank

173rd

Average age of mothers at childbirth over time

Sao Tome and Principe
Zambia

How they compare

Sao Tome and Principe currently reports 28.47 years against 28.44 years in Zambia, a difference of 0.03 years.

The two have swapped places 4 times across 74 shared years of data; in 1950 it was Sao Tome and Principe ahead.

Sao Tome and Principe ranks 171st and Zambia ranks 173rd of 236 countries.

Across the 8 decades both report, Sao Tome and Principe averaged higher in 5 and Zambia in 3.

Head to head by decade

Decade	Sao Tome and Principe	Zambia	Difference	Ahead
1950s	29.24 years	28.97 years	0.2711 years	Sao Tome and Principe
1960s	29.24 years	29.02 years	0.2204 years	Sao Tome and Principe
1970s	29.24 years	29.22 years	0.0269 years	Sao Tome and Principe
1980s	29.24 years	29.59 years	0.3517 years	Zambia
1990s	29.19 years	29.07 years	0.1148 years	Sao Tome and Principe
2000s	28.87 years	29 years	0.1382 years	Zambia
2010s	28.64 years	28.81 years	0.171 years	Zambia
2020s	28.5 years	28.5 years	0.0033 years	Sao Tome and Principe

Averages of every year both report within each decade.

Frequently asked questions

Which has higher average age of mothers at childbirth, Sao Tome and Principe or Zambia?: Sao Tome and Principe, at 28.47 years against 28.44 years in Zambia as of 2023.
What is the difference in average age of mothers at childbirth between Sao Tome and Principe and Zambia?: 0.03 years, with Sao Tome and Principe ahead.
How many years of comparable data are there for Sao Tome and Principe and Zambia?: 74 years are reported by both, from 1950 to 2023.
How do Sao Tome and Principe and Zambia rank globally for average age of mothers at childbirth?: Sao Tome and Principe ranks 171st and Zambia ranks 173rd 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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Sao Tome and Principe vs Zambia: 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 03 September 2026, from https://reference.statizoid.com/compare/period-average-age-of-mothers/sao-tome-and-principe/zambia/

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<a href="https://reference.statizoid.com/compare/period-average-age-of-mothers/sao-tome-and-principe/zambia/">Sao Tome and Principe vs Zambia: Average age of mothers at childbirth</a> — Statizoid

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: 28 August 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.