Europe & Central Asia · BE
Generation Alpha & Beta
in Belgium
How many of each cohort Belgium has, how fast the next one is arriving, and what the fertility rate, median age and school system mean for both.
Belgium has approximately 1.8 million Generation Alpha people (born 2010–2024), about 15.3% of its population, and roughly 182,043 Generation Beta children born since 2025. Its fertility rate is 1.4 and its child population is shrinking, projected -12% by 2040.
Births since 1 January 2025 at Belgium's own rate, less infant mortality. At 276 births a day it climbs steadily rather than visibly.
Born 2010–2024 — 15.3% of the population, aged 2–16 this year.
About 276 births a day, all of them Generation Beta.
Smaller than the Alpha cohort of 1.8 million.
Size of the Generation Alpha cohort
Share of the population under 15
Total fertility rate
Child population to 2040 (−12%)
Belgium against the world average
Key dates for Belgium
13 compulsory years from age 6.
Born on 1 January 2025, they reach Belgium's starting age of 6.
Under-15s change by −12% against today.
Eighteen years after the cohort opened.
The cohort closes on 31 December 2039; its youngest members enter school here.
School dates follow Belgium's own starting age of 6 and 13 compulsory years, so they differ from the global figures on our Generation Beta page.
Every figure on this page
Belgium in 20 numbers
| Indicator | Belgium | World average | Rank |
|---|---|---|---|
| Population | 11.8 million | — | #79 of 194 |
| Generation Alpha (born 2010–2024) | 1.8 million | — | #99 of 194 |
| Gen Alpha share of population | 15.3% | — | #159 of 194 |
| Projected Gen Beta births 2025–39 | 1.5 million | — | #100 of 194 |
| Births per year | 100,860 | — | #100 of 194 |
| Births per day | 276 | — | #100 of 194 |
| Under-15 share of population | 16% | 25% | #145 of 194 |
| Total fertility rate | 1.4 | 2.2 | #150 of 194 |
| Median age | 42 years | 31 years | #30 of 194 |
| Life expectancy at birth | 83 years | 73 years | #14 of 194 |
| Urban population | 88% | 58% | #28 of 194 |
| Internet use | 96% | 68% | #21 of 192 |
| Secondary school completion | 92% | 60% | #69 of 189 |
| School starting age | age 6 | — | #30 of 194 |
| Compulsory years of schooling | 13 years | — | #12 of 194 |
| Daily screen time, ages 8–12 | Not reported | — | |
| Cost of raising a child to 18 | Not reported | — | |
| Under-15 population change to 2040 | −12% | — | #120 of 194 |
| Youth dependency ratio | 25 per 100 adults | — | #134 of 194 |
| Mobile connections per 100 people | 104 | — | #126 of 194 |
Rank is out of the 194 countries profiled here and always runs highest first — so #1 on median age is the oldest country, not the youngest. World averages are population-weighted global figures and are shown only where a comparable one exists. Sources: UN World Population Prospects, World Bank Open Data, UNESCO and ITU, via our sources page.
1950 to 2023, with the UN projection to 2030
Belgium birth rate and fertility rate by year
About 101,700 babies were born in Belgium in 2023, and women had 1.38 children on average. Since 1950, births peaked in 1964 at about 159,400. Fertility first fell below the replacement level of 2.1 in 1972. Annual births are 12% lower than in 2000.
Fertility rate (children per woman)
Births per year
Thousands of births. Dashed: UN medium-variant projection.
| Year | Births | Fertility rate |
|---|---|---|
| 1950 | 143,900 | 2.35 |
| 1960 | 154,200 | 2.53 |
| 1970 | 141,600 | 2.25 |
| 1980 | 123,500 | 1.69 |
| 1990 | 123,800 | 1.63 |
| 2000 | 115,900 | 1.66 |
| 2010 | 128,600 | 1.85 |
| 2015 | 121,200 | 1.69 |
| 2020 | 115,600 | 1.57 |
| 2021 | 117,700 | 1.60 |
| 2022 | 113,800 | 1.55 |
| 2023 | 101,700 | 1.38 |
| 2025 projected | 101,200 | 1.39 |
| 2030 projected | 100,200 | 1.42 |
UN World Population Prospects 2024, republished by Our World in Data. Years to 2023 are UN estimates, which can differ from a country's own registered counts; later years are the UN medium-variant projection. Every country is ranked on fertility rate by country.
Regional peers
Elsewhere in Europe & Central Asia
Russia
26 million Generation Alpha
Germany
12 million Generation Alpha
United Kingdom
12 million Generation Alpha
France
12 million Generation Alpha
Italy
7 million Generation Alpha
Spain
6 million Generation Alpha
Ukraine
6 million Generation Alpha
Uzbekistan
11.8 million Generation Alpha
Run the numbers yourself
Tools that use this data
Gen Beta by Country Forecast
Where the 2.1 billion Betas will be born, and which countries shrink instead.
Under-15 Share by Country
The countries where Alpha and Beta make up the largest share of the population.
Global Child Population Table
Where the world's children are, ranked by region, with the direction each one is…
Median Age Calculator
What a country's median age implies about its Alpha and Beta share, its dependency…
School-Age Population Forecast
How many children will be of school age in any year, globally or nationally.
Where a tool takes a number it opens prefilled with Belgium's own figure rather than the world one, and every input stays editable. The rest are the same ranked tables for every country.
Frequently asked about Belgium
How many Gen Alpha are there in Belgium?
Approximately 1.8 million people born between 2010 and 2024 live in Belgium, about 15.3% of the population.
How many Gen Beta children are there in Belgium?
Roughly 182,043 children have been born in Belgium since 1 January 2025, growing by about 12 every hour.
What is the fertility rate in Belgium?
Belgium has a total fertility rate of 1.4 children per woman, against a replacement level of 2.1 and a world average of about 2.2.
At what age do children start school in Belgium?
Compulsory schooling begins at age 6 in Belgium, and runs for 13 years.
Is the child population in Belgium growing or shrinking?
It is shrinking. The under-15 population is projected to change by -12% between now and 2040.
How many babies are born in Belgium each year?
About 101,700 in 2023, according to UN estimates, down from a peak of about 159,400 in 1964 (the highest since 1950). The UN projects about 100,200 in 2030.
How has the fertility rate in Belgium changed over time?
It was 2.35 children per woman in 1950 and 1.38 in 2023. It first fell below the replacement level of 2.1 in 1972.
AlphaBetaMinds (2026). Generation Alpha and Generation Beta in Belgium. Retrieved from https://alphabetaminds.com/countries/belgium
The printed sheet keeps the headline numbers, the world comparison, the key dates, the full indicator table and this citation, and drops the navigation, the tools and the FAQ. It fits a page or two and needs no login.
Free to reproduce, commercially or not, with a credit and a link. Figures are estimates for 2025–2026 and are updated when the underlying sources are.