Bulgaria vs United States of America: Average age of mothers at childbirth by birth order
Bulgaria
26.47 years
in 2021
United States of America
27.85 years
in 2023
Bulgaria rank
30th
United States of America rank
27th
Average age of mothers at childbirth by birth order over time
- Bulgaria
- United States of America
How they compare
United States of America currently reports 27.85 years against 26.47 years in Bulgaria, a difference of 1.38 years.
That makes United States of America's figure about 1.1 times Bulgaria's.
Across all 75 years both countries report, United States of America has been ahead every year.
Bulgaria ranks 30th and United States of America ranks 27th of 33 countries.
United States of America has averaged higher in every one of the 9 decades both report.
Head to head by decade
| Decade | Bulgaria | United States of America | Difference | Ahead |
|---|---|---|---|---|
| 1940s | 22.9 years | 23.57 years | 0.67 years | United States of America |
| 1950s | 22.41 years | 22.77 years | 0.362 years | United States of America |
| 1960s | 22.03 years | 22.36 years | 0.326 years | United States of America |
| 1970s | 21.98 years | 22.79 years | 0.806 years | United States of America |
| 1980s | 21.88 years | 23.96 years | 2.08 years | United States of America |
| 1990s | 22.35 years | 24.56 years | 2.21 years | United States of America |
| 2000s | 24.43 years | 25.61 years | 1.18 years | United States of America |
| 2010s | 25.9 years | 26.83 years | 0.933 years | United States of America |
| 2020s | 26.44 years | 27.61 years | 1.17 years | United States of America |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher average age of mothers at childbirth by birth order, Bulgaria or United States of America?
- United States of America, at 27.85 years against 26.47 years in Bulgaria as of 2023.
- What is the difference in average age of mothers at childbirth by birth order between Bulgaria and United States of America?
- 1.38 years, with United States of America ahead.
- How many years of comparable data are there for Bulgaria and United States of America?
- 75 years are reported by both, from 1947 to 2021.
- How do Bulgaria and United States of America rank globally for average age of mothers at childbirth by birth order?
- Bulgaria ranks 30th and United States of America ranks 27th of 33 countries.
- Where does this data come from?
- Human Fertility Database (2025) – processed by Our World in Data, published as Average age of mothers at childbirth by birth order. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Average age of mothers when they have their first child in a specific year. It is standardized for the age structure of the female population of reproductive age.