Birth seasonality in Bulgaria
Bulgaria: Birth seasonality was 21.85 births per million people in 2021. ▼ Falling
Latest (2021)
21.85 births per million people
Change on year
up 10.1%
World rank
26th
of 40 countries
All-time high
57.54 births per million people
in 1920
All-time low
17.47 births per million people
in 1997
Years of data
90
1900–2021
Birth seasonality in Bulgaria, 1900–2021
Source: Human Mortality Database (2025) – processed by Our World in Data. Measured in births per million people.
Analysis
Bulgaria recorded 21.85 births per million people for birth seasonality in 2021.
That represents a change of up 10.1% on the previous year and down 11.5% over ten years.
Over the whole period, birth seasonality in Bulgaria peaked at 57.54 births per million people in 1920 and was at its lowest, 17.47 births per million people, in 1997.
That places Bulgaria 26th out of 40 countries with data for 2021, putting it in the middle of the range.
The long-run direction has been consistently falling across the 90 years of available data.
Birth seasonality in Bulgaria, year by year
| Year | births per million people | Change |
|---|---|---|
| 1900 | 35.5 births per million people | — |
| 1905 | 52.37 births per million people | +47.5% |
| 1910 | 46.03 births per million people | -12.1% |
| 1920 | 57.54 births per million people | +25.0% |
| 1925 | 51.32 births per million people | -10.8% |
| 1930 | 48.87 births per million people | -4.8% |
| 1935 | 40.18 births per million people | -17.8% |
| 1939 | 37.08 births per million people | -7.7% |
| 1940 | 38.79 births per million people | +4.6% |
| 1941 | 37.42 births per million people | -3.5% |
| 1942 | 41.52 births per million people | +11.0% |
| 1943 | 45.09 births per million people | +8.6% |
| 1944 | 49.91 births per million people | +10.7% |
| 1945 | 56.37 births per million people | +12.9% |
| 1946 | 48.89 births per million people | -13.3% |
| 1947 | 52.15 births per million people | +6.7% |
| 1948 | 52.99 births per million people | +1.6% |
| 1949 | 53.45 births per million people | +0.9% |
| 1950 | 53.51 births per million people | +0.1% |
| 1951 | 44.61 births per million people | -16.6% |
| 1952 | 42.62 births per million people | -4.4% |
| 1953 | 40.5 births per million people | -5.0% |
| 1954 | 40.64 births per million people | +0.3% |
| 1955 | 40.43 births per million people | -0.5% |
| 1956 | 37.76 births per million people | -6.6% |
| 1957 | 40.88 births per million people | +8.3% |
| 1958 | 41.14 births per million people | +0.6% |
| 1959 | 38.4 births per million people | -6.7% |
| 1960 | 41.42 births per million people | +7.9% |
| 1961 | 40.61 births per million people | -2.0% |
| 1962 | 38.15 births per million people | -6.1% |
| 1963 | 36.18 births per million people | -5.1% |
| 1964 | 37.86 births per million people | +4.6% |
| 1965 | 36.44 births per million people | -3.8% |
| 1966 | 37.75 births per million people | +3.6% |
| 1967 | 39.97 births per million people | +5.9% |
| 1968 | 45.8 births per million people | +14.6% |
| 1969 | 39.58 births per million people | -13.6% |
| 1970 | 40.81 births per million people | +3.1% |
| 1971 | 37.75 births per million people | -7.5% |
| 1972 | 39.68 births per million people | +5.1% |
| 1973 | 47.78 births per million people | +20.4% |
| 1974 | 41.11 births per million people | -14.0% |
| 1975 | 42.78 births per million people | +4.1% |
| 1976 | 40.73 births per million people | -4.8% |
| 1977 | 39.86 births per million people | -2.1% |
| 1978 | 39.02 births per million people | -2.1% |
| 1979 | 38.9 births per million people | -0.3% |
| 1980 | 38.04 births per million people | -2.2% |
| 1981 | 34.61 births per million people | -9.0% |
| 1982 | 35.1 births per million people | +1.4% |
| 1983 | 35.97 births per million people | +2.5% |
| 1984 | 33.54 births per million people | -6.7% |
| 1985 | 36.18 births per million people | +7.9% |
| 1986 | 33.53 births per million people | -7.3% |
| 1987 | 34.28 births per million people | +2.2% |
| 1988 | 33.59 births per million people | -2.0% |
| 1989 | 32.29 births per million people | -3.9% |
| 1990 | 30.85 births per million people | -4.5% |
| 1991 | 26.26 births per million people | -14.9% |
| 1992 | 26.09 births per million people | -0.6% |
| 1993 | 23.8 births per million people | -8.8% |
| 1994 | 23.23 births per million people | -2.4% |
| 1995 | 21.31 births per million people | -8.3% |
| 1996 | 22.48 births per million people | +5.5% |
| 1997 | 17.47 births per million people | -22.3% |
| 1998 | 21.47 births per million people | +22.9% |
| 1999 | 22.38 births per million people | +4.2% |
| 2000 | 24.63 births per million people | +10.1% |
| 2001 | 21.22 births per million people | -13.8% |
| 2002 | 22.57 births per million people | +6.4% |
| 2003 | 21.68 births per million people | -4.0% |
| 2004 | 23.65 births per million people | +9.1% |
| 2005 | 24.41 births per million people | +3.2% |
| 2006 | 24.87 births per million people | +1.9% |
| 2007 | 27.31 births per million people | +9.8% |
| 2008 | 27.44 births per million people | +0.5% |
| 2009 | 28.1 births per million people | +2.4% |
| 2010 | 27.18 births per million people | -3.3% |
| 2011 | 24.69 births per million people | -9.2% |
| 2012 | 24.57 births per million people | -0.5% |
| 2013 | 23.68 births per million people | -3.6% |
| 2014 | 23.52 births per million people | -0.7% |
| 2015 | 22.57 births per million people | -4.0% |
| 2016 | 23.04 births per million people | +2.1% |
| 2017 | 22.31 births per million people | -3.2% |
| 2018 | 21.72 births per million people | -2.6% |
| 2019 | 21.8 births per million people | +0.4% |
| 2020 | 19.84 births per million people | -9.0% |
| 2021 | 21.85 births per million people | +10.1% |
Bulgaria compared with similar countries
- Bulgaria's 21.85 births per million people is below the median for high income countries, which is 23.36 births per million people, 94% of the median. (38 countries reporting)
- Bulgaria's 21.85 births per million people is below the median for Europe & Central Asia, which is 23.39 births per million people, 93% of the median. (31 countries reporting)
Biggest year-on-year movements
Years where Birth seasonality in Bulgaria changed far more than this series normally does. A large move can be a real event or a change in how the figure was measured — the source note below says who published it.
| Year | Change | From | To |
|---|---|---|---|
| 1905 | +47.5% | 35.5 births per million people | 52.37 births per million people |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1900s | 43.94 births per million people | 35.5 births per million people | 52.37 births per million people | 2 |
| 1910s | 46.03 births per million people | 46.03 births per million people | 46.03 births per million people | 1 |
| 1920s | 54.43 births per million people | 51.32 births per million people | 57.54 births per million people | 2 |
| 1930s | 42.04 births per million people | 37.08 births per million people | 48.87 births per million people | 3 |
| 1940s | 47.66 births per million people | 37.42 births per million people | 56.37 births per million people | 10 |
| 1950s | 42.05 births per million people | 37.76 births per million people | 53.51 births per million people | 10 |
| 1960s | 39.38 births per million people | 36.18 births per million people | 45.8 births per million people | 10 |
| 1970s | 40.84 births per million people | 37.75 births per million people | 47.78 births per million people | 10 |
| 1980s | 34.71 births per million people | 32.29 births per million people | 38.04 births per million people | 10 |
| 1990s | 23.53 births per million people | 17.47 births per million people | 30.85 births per million people | 10 |
| 2000s | 24.59 births per million people | 21.22 births per million people | 28.1 births per million people | 10 |
| 2010s | 23.51 births per million people | 21.72 births per million people | 27.18 births per million people | 10 |
| 2020s | 20.84 births per million people | 19.84 births per million people | 21.85 births per million people | 2 |
Countries ranked near Bulgaria
- 23 Canada 22.84 births per million people compare
- 24 Slovenia 22.82 births per million people compare
- 25 Switzerland 22.78 births per million people compare
- 27 Austria 21.77 births per million people compare
- 28 Portugal 21.68 births per million people compare
- 29 Sweden 21.28 births per million people compare
More population data for Bulgaria
- Un population 2024 vs 2022, annual growth rate -1.18 % change on previous year (2100)
- Population long run with projections, annual growth rate -0.7245 % change on previous year (2100)
- Urban and rural population 2050, annual growth rate -2.34 % change on previous year (2050)
- Population regions with projections, annual growth rate -0.7245 % change on previous year (2100)
- Population growth rate, by level of development -0.7% (2100)
- Number of children under 5, by world region 146,527 people (2100)
- Population density 32.53 people per km² (2100)
- World population growth -0.7% (2100)
- Projected population under age 5, annual growth rate -0.921 % change on previous year (2100)
- Africa's Development Dynamics (AfDD) Table 03 - Annual population -0.8803 Percent per annum (2030)
Frequently asked questions
- What is birth seasonality in Bulgaria?
- Birth seasonality in Bulgaria was 21.85 births per million people in 2021, according to Human Mortality Database (2025) – processed by Our World in Data.
- What is the highest birth seasonality recorded in Bulgaria?
- The highest recorded value was 57.54 births per million people in 1920.
- What is the lowest birth seasonality recorded in Bulgaria?
- The lowest recorded value was 17.47 births per million people in 1997.
- How does Bulgaria rank for birth seasonality?
- Bulgaria ranks 26th out of 40 countries with data for 2021.
- Is birth seasonality rising or falling in Bulgaria?
- Over the last ten years it is down 11.5%. The long-run trend across the full record is falling.
- Where does this Bulgaria data come from?
- The figures come from Human Mortality Database (2025) – processed by Our World in Data, published as part of Birth seasonality. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 90 observations, free to reuse under CC BY 4.0 (Our World in Data).
About this data
Average daily number of births, per million people, calculated for December.