Peak birth month in Bulgaria
Bulgaria: Peak birth month was 9 in 2021. ▲ Rising
Peak birth month in Bulgaria, 1900–2021
Source: Human Mortality Database (2025) – processed by Our World in Data.
Analysis
Bulgaria recorded 9 for peak birth month in 2021.
That represents a change of up 28.6% on the previous year and up 28.6% over ten years.
Over the whole period, peak birth month in Bulgaria peaked at 12 in 1973 and was at its lowest, 1, in 1905.
That places Bulgaria 3rd out of 40 countries with data for 2021, putting it in the top 10%.
The long-run direction has been consistently rising across the 90 years of available data.
Peak birth month in Bulgaria, year by year
| Year | Value | Change |
|---|---|---|
| 1900 | 10 | — |
| 1905 | 1 | -90.0% |
| 1910 | 2 | +100.0% |
| 1920 | 2 | +0.0% |
| 1925 | 2 | +0.0% |
| 1930 | 3 | +50.0% |
| 1935 | 2 | -33.3% |
| 1939 | 10 | +400.0% |
| 1940 | 3 | -70.0% |
| 1941 | 3 | +0.0% |
| 1942 | 9 | +200.0% |
| 1943 | 9 | +0.0% |
| 1944 | 10 | +11.1% |
| 1945 | 9 | -10.0% |
| 1946 | 3 | -66.7% |
| 1947 | 2 | -33.3% |
| 1948 | 2 | +0.0% |
| 1949 | 2 | +0.0% |
| 1950 | 2 | +0.0% |
| 1951 | 1 | -50.0% |
| 1952 | 3 | +200.0% |
| 1953 | 3 | +0.0% |
| 1954 | 3 | +0.0% |
| 1955 | 3 | +0.0% |
| 1956 | 3 | +0.0% |
| 1957 | 3 | +0.0% |
| 1958 | 3 | +0.0% |
| 1959 | 2 | -33.3% |
| 1960 | 3 | +50.0% |
| 1961 | 3 | +0.0% |
| 1962 | 2 | -33.3% |
| 1963 | 3 | +50.0% |
| 1964 | 3 | +0.0% |
| 1965 | 4 | +33.3% |
| 1966 | 3 | -25.0% |
| 1967 | 3 | +0.0% |
| 1968 | 9 | +200.0% |
| 1969 | 3 | -66.7% |
| 1970 | 4 | +33.3% |
| 1971 | 4 | +0.0% |
| 1972 | 4 | +0.0% |
| 1973 | 12 | +200.0% |
| 1974 | 1 | -91.7% |
| 1975 | 5 | +400.0% |
| 1976 | 5 | +0.0% |
| 1977 | 3 | -40.0% |
| 1978 | 4 | +33.3% |
| 1979 | 5 | +25.0% |
| 1980 | 5 | +0.0% |
| 1981 | 6 | +20.0% |
| 1982 | 6 | +0.0% |
| 1983 | 8 | +33.3% |
| 1984 | 5 | -37.5% |
| 1985 | 8 | +60.0% |
| 1986 | 7 | -12.5% |
| 1987 | 7 | +0.0% |
| 1988 | 7 | +0.0% |
| 1989 | 6 | -14.3% |
| 1990 | 1 | -83.3% |
| 1991 | 7 | +600.0% |
| 1992 | 6 | -14.3% |
| 1993 | 7 | +16.7% |
| 1994 | 6 | -14.3% |
| 1995 | 8 | +33.3% |
| 1996 | 7 | -12.5% |
| 1997 | 5 | -28.6% |
| 1998 | 7 | +40.0% |
| 1999 | 7 | +0.0% |
| 2000 | 7 | +0.0% |
| 2001 | 7 | +0.0% |
| 2002 | 9 | +28.6% |
| 2003 | 7 | -22.2% |
| 2004 | 7 | +0.0% |
| 2005 | 8 | +14.3% |
| 2006 | 7 | -12.5% |
| 2007 | 7 | +0.0% |
| 2008 | 9 | +28.6% |
| 2009 | 9 | +0.0% |
| 2010 | 7 | -22.2% |
| 2011 | 7 | +0.0% |
| 2012 | 9 | +28.6% |
| 2013 | 9 | +0.0% |
| 2014 | 7 | -22.2% |
| 2015 | 7 | +0.0% |
| 2016 | 9 | +28.6% |
| 2017 | 7 | -22.2% |
| 2018 | 7 | +0.0% |
| 2019 | 7 | +0.0% |
| 2020 | 7 | +0.0% |
| 2021 | 9 | +28.6% |
Bulgaria compared with similar countries
- Bulgaria's 9 is above the median for high income countries, which is 7, 1.3× the median. (38 countries reporting)
- Bulgaria's 9 is above the median for Europe & Central Asia, which is 7, 1.3× the median. (31 countries reporting)
Biggest year-on-year movements
Years where Peak birth month 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 |
|---|---|---|---|
| 1991 | +600.0% | 1 | 7 |
| 1939 | +400.0% | 2 | 10 |
| 1975 | +400.0% | 1 | 5 |
| 1942 | +200.0% | 3 | 9 |
| 1952 | +200.0% | 1 | 3 |
| 1968 | +200.0% | 3 | 9 |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1900s | 5.5 | 1 | 10 | 2 |
| 1910s | 2 | 2 | 2 | 1 |
| 1920s | 2 | 2 | 2 | 2 |
| 1930s | 5 | 2 | 10 | 3 |
| 1940s | 5.2 | 2 | 10 | 10 |
| 1950s | 2.6 | 1 | 3 | 10 |
| 1960s | 3.6 | 2 | 9 | 10 |
| 1970s | 4.7 | 1 | 12 | 10 |
| 1980s | 6.5 | 5 | 8 | 10 |
| 1990s | 6.1 | 1 | 8 | 10 |
| 2000s | 7.7 | 7 | 9 | 10 |
| 2010s | 7.6 | 7 | 9 | 10 |
| 2020s | 8 | 7 | 9 | 2 |
Countries ranked near Bulgaria
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 peak birth month in Bulgaria?
- Peak birth month in Bulgaria was 9 in 2021, according to Human Mortality Database (2025) – processed by Our World in Data.
- What is the highest peak birth month recorded in Bulgaria?
- The highest recorded value was 12 in 1973.
- What is the lowest peak birth month recorded in Bulgaria?
- The lowest recorded value was 1 in 1905.
- How does Bulgaria rank for peak birth month?
- Bulgaria ranks 3rd out of 40 countries with data for 2021.
- Is peak birth month rising or falling in Bulgaria?
- Over the last ten years it is up 28.6%. The long-run trend across the full record is rising.
- 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 Peak birth month. Statizoid updates them automatically from the source API.
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About this data
Number corresponding to the month with the highest daily birth rate.