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Fertility & birth rates in Brunei and Sao Tome and Principe

Updated on by Georank team

Brunei has an annual birth rate of 13.6 births per 1,000 people, compared to 28.2 for Sao Tome and Principe. The average number of children a woman is expected to have during her lifetime — the fertility rate, is 1.75 in Brunei and 3.64 in Sao Tome and Principe — 108.6% difference.

1960 vs 2023, the fertility rate has decreased by 76.1% in Brunei and by 41.6% in Sao Tome and Principe — in 1960, it was 7.32 and 6.24, respectively.

  • Brunei is ranked 105/196 by birth rate compared to 39/196 for Sao Tome and Principe.
  • The mean age at childbearing (for all the births, not just the first) is 30.8 in Brunei — it's 28.4 in Sao Tome and Principe.
  • Annual births per 1,000 women ages 15-19 (adolescent birth rate or teenage mother rate) is 8.52 in Brunei vs 86.2 in Sao Tome and Principe.
  • In Brunei, 25.7% of the population is composed of women of reproductive age (15-49), compared to 25.2% in Sao Tome and Principe.

Fertility rate in Brunei vs Sao Tome and Principe by year

Brunei
Sao Tome and Principe
1x
Year Fertility rate
Brunei Sao Tome
2023 1.75 3.64
2022 1.76 3.7
2021 1.78 3.76
2020 1.8 3.83
2019 1.82 3.9
2018 1.85 3.98
2017 1.88 4.07
2016 1.92 4.2
2015 1.95 4.35
2014 1.97 4.49
2013 1.98 4.58
2012 1.97 4.66
2011 1.96 4.72
2010 1.94 4.77
2009 1.92 4.84
2008 1.92 4.91
2007 1.93 4.96
2006 1.97 4.93
2005 2.02 4.94
2004 2.1 4.96
2003 2.19 5.01
2002 2.26 5.06
2001 2.34 5.1
2000 2.4 5.16
1999 2.46 5.23
1998 2.53 5.3
1997 2.6 5.4
1996 2.68 5.47
1995 2.79 5.55
1994 2.9 5.56
1993 3.01 5.64
1992 3.11 5.7
1991 3.21 5.77
1990 3.29 5.83
1989 3.36 5.88
1988 3.44 5.94
1987 3.49 5.99
1986 3.55 6.05
1985 3.61 6.1
1984 3.68 6.16
1983 3.75 6.22
1982 3.84 6.28
1981 3.94 6.33
1980 4.07 6.39
1979 4.22 6.43
1978 4.39 6.47
1977 4.58 6.5
1976 4.78 6.52
1975 4.99 6.53
1974 5.18 6.53
1973 5.36 6.53
1972 5.5 6.51
1971 5.62 6.49
1970 5.8 6.47
1969 6.01 6.44
1968 6.2 6.42
1967 6.37 6.39
1966 6.51 6.37
1965 6.65 6.35
1964 6.77 6.33
1963 6.89 6.31
1962 7.03 6.28
1961 7.19 6.26
1960 7.32 6.24

Data sources: World Bank | Health (1960–2023, retrieved 2026-04-06).

GeoRank.org/birth-rate/brunei/sao-tome-and-principe | CC BY

According to the latest available data on birth rates, the fertility rate in Brunei was 1.75 children per woman in 2023, compared to 3.64 in Sao Tome and Principe in 2023. The replacement level is considered to be 2.1 children per woman.

Check Brunei vs Sao Tome and Principe population clock for a dynamic visualization of the changing population.

Natural population change by year

Brunei
Sao Tome and Principe
1x
Year Natural population change
Brunei Sao Tome
2023 3,837 5,221
2022 3,319 5,102
2021 3,985 4,954
2020 4,188 4,874
2019 4,335 4,932
2018 4,502 4,957
2017 4,685 5,007
2016 4,876 5,125
2015 5,060 5,269
2014 5,206 5,381
2013 5,302 5,449
2012 5,349 5,501
2011 5,242 5,445
2010 5,003 5,391
2009 4,789 5,349
2008 4,624 5,297
2007 4,521 5,226
2006 4,590 5,057
2005 4,703 4,897
2004 4,874 4,810
2003 5,034 4,702
2002 5,169 4,591
2001 5,275 4,471
2000 5,331 4,334
1999 5,388 4,221
1998 5,466 4,120
1997 5,518 4,041
1996 5,606 3,993
1995 5,750 3,948
1994 5,907 3,860
1993 6,045 3,841
1992 6,169 3,822
1991 6,259 3,801
1990 6,265 3,719
1989 6,202 3,576
1988 6,135 3,544
1987 6,017 3,440
1986 5,826 3,180
1985 5,620 3,242
1984 5,373 3,163
1983 5,138 3,100
1982 4,931 3,047
1981 4,839 3,015
1980 4,775 2,965
1979 4,717 2,893
1978 4,668 2,800
1977 4,594 2,705
1976 4,518 2,608
1975 4,431 2,515
1974 4,334 2,422
1973 4,216 2,329
1972 4,085 2,232
1971 3,880 2,127
1970 3,694 1,980
1969 3,618 1,862
1968 3,551 1,767
1967 3,477 1,693
1966 3,403 1,642
1965 3,326 1,611
1964 3,264 1,600
1963 3,195 1,609
1962 3,128 1,625
1961 3,175 1,657
1960 3,168 1,547

Data sources: World Bank | Health (1960–2023, retrieved 2026-04-06).

GeoRank.org/birth-rate/brunei/sao-tome-and-principe | CC BY

The chart above illustrates the comparison of the absolute yearly changes in population resulting from births and deaths.

Excluding migration, the natural population change due to births and deaths from 2022 to 2023 was +0.84% in Brunei and +2.26% in Sao Tome and Principe.

For the past 10 years, the annual natural population change has been +1.01% in Brunei and +2.4% in Sao Tome and Principe.

Birth rate in Brunei vs Sao Tome and Principe by year

Brunei
Sao Tome and Principe

Annual births per 1,000 people

1x
Year Annual births per 1,000 people
Brunei Sao Tome
2023 13.6 28.2
2022 13.8 28.3
2021 14.1 28.5
2020 14.3 28.6
2019 14.6 29.2
2018 14.9 29.8
2017 15.3 30.6
2016 15.8 31.7
2015 16.2 33
2014 16.6 34.3
2013 16.9 35.4
2012 17.1 36.4
2011 17 36.8
2010 16.6 37.3
2009 16.2 37.9
2008 16 38.5
2007 15.9 38.9
2006 16.3 38.9
2005 16.7 39
2004 17.4 39.2
2003 18 39.6
2002 18.7 39.8
2001 19.3 40
2000 19.8 39.7
1999 20.4 39.4
1998 21 39.2
1997 21.6 39.2
1996 22.4 39.3
1995 23.4 39.5
1994 24.5 39.4
1993 25.6 39.8
1992 26.7 40.2
1991 27.7 40.7
1990 28.5 40.7
1989 29 40.9
1988 29.5 40.9
1987 29.8 41
1986 29.9 41
1985 29.9 41
1984 29.7 41.1
1983 29.4 41.2
1982 29.3 41.3
1981 29.7 41.5
1980 30.3 41.6
1979 30.9 41.6
1978 31.6 41.4
1977 32.2 41.3
1976 32.8 41.1
1975 33.4 40.9
1974 34 40.6
1973 34.5 40.3
1972 34.9 39.9
1971 34.6 39.5
1970 34.3 38.8
1969 34.7 38.2
1968 35.6 37.8
1967 36.5 37.7
1966 37.5 38
1965 38.6 38.6
1964 39.7 39.7
1963 41 41.1
1962 42.8 42.7
1961 45 44.6
1960 47.2 44.6

Data sources: World Bank | Health (1960–2023, retrieved 2026-04-06).

GeoRank.org/birth-rate/brunei/sao-tome-and-principe | CC BY

The latest reported birth rate per 1,000 people in 2023 was 13.6 in Brunei and 28.2 in Sao Tome and Principe, compared with 47.2 and 44.6, respectively, in 1960.

Birth rate data compared

Brunei Sao Tome
Fertility rate 1.75 3.64
Fertility rate rank 115/196 41/196
Birth rate 13.6 28.2
Birth rate rank 105/196 39/196
Population change due to births and deaths +3,837 +5,221
Natural population change rank 132/196 126/196
Natural population change rate +0.84% +2.26%
Population growth +0.82% +2.02%
Population growth rank 114/197 49/197
Age at first childbirth n/a 19.4 years
Average age at childbearing 30.8 years 28.4 years
Annual births per 1,000 women ages 15-19 7.18 82.5
Annual births per 1,000 women ages 20-29 73.5 169.9
Annual births per 1,000 women ages 30+ 26.8 47.4
Female of reproductive age (15-49), share of population 25.7% 25.2%
Any modern method of contraceptive prevalence among married women ages 15-49 n/a 46%
Share of births attended by skilled health staff 99.6% 96.8%
Maternal mortality per live birth 0.04% 0.08%
Neonatal mortality rate (before reaching 28 days of age) 0.49% 0.68%
Infant mortality rate (before reaching 1 year of age) 0.82% 0.94%
Mortality rate before reaching 5 years of age 0.94% 1.39%
Life expectancy 75.8 years 70.3 years

Children 0-14 years as share of population

Brunei
Factual

UN forecast
Sao Tome and Principe
Factual

UN forecast
1x
Year Young
Brunei Sao Tome
2100 13.8% 19.5%
2099 13.9% 19.6%
2098 13.9% 19.8%
2097 13.9% 19.9%
2096 14% 20%
2095 14% 20.2%
2094 14.1% 20.3%
2093 14.1% 20.4%
2092 14.1% 20.6%
2091 14.1% 20.7%
2090 14.2% 20.9%
2089 14.2% 21.1%
2088 14.2% 21.2%
2087 14.2% 21.4%
2086 14.2% 21.6%
2085 14.2% 21.8%
2084 14.2% 22%
2083 14.2% 22.2%
2082 14.2% 22.4%
2081 14.2% 22.6%
2080 14.2% 22.9%
2079 14.2% 23.1%
2078 14.2% 23.3%
2077 14.2% 23.5%
2076 14.2% 23.7%
2075 14.2% 24%
2074 14.3% 24.2%
2073 14.3% 24.4%
2072 14.3% 24.6%
2071 14.4% 24.8%
2070 14.4% 25%
2069 14.5% 25.2%
2068 14.6% 25.4%
2067 14.6% 25.6%
2066 14.7% 25.9%
2065 14.8% 26.1%
2064 14.8% 26.3%
2063 14.9% 26.5%
2062 15% 26.8%
2061 15% 27%
2060 15.1% 27.3%
2059 15.2% 27.5%
2058 15.2% 27.8%
2057 15.3% 28.1%
2056 15.3% 28.4%
2055 15.4% 28.7%
2054 15.4% 29%
2053 15.4% 29.4%
2052 15.5% 29.7%
2051 15.5% 30.1%
2050 15.6% 30.4%
2049 15.6% 30.8%
2048 15.7% 31.1%
2047 15.8% 31.5%
2046 15.9% 31.8%
2045 16% 32.1%
2044 16.1% 32.5%
2043 16.2% 32.8%
2042 16.3% 33.1%
2041 16.5% 33.4%
2040 16.7% 33.6%
2039 16.9% 33.9%
2038 17.1% 34.1%
2037 17.4% 34.4%
2036 17.6% 34.6%
2035 17.9% 34.7%
2034 18.1% 34.9%
2033 18.4% 35.1%
2032 18.7% 35.3%
2031 19% 35.5%
2030 19.3% 35.8%
2029 19.6% 36.1%
2028 20% 36.6%
2027 20.3% 37%
2026 20.5% 37.3%
2025 20.7% 37.6%
2024 20.8% 37.8%
2023 21% 38.3%
2022 21.2% 38.8%
2021 21.3% 39.4%
2020 21.6% 39.9%
2019 21.9% 40.5%
2018 22.3% 40.9%
2017 22.7% 41.4%
2016 23.1% 41.7%
2015 23.6% 41.9%
2014 24% 42%
2013 24.5% 42%
2012 24.9% 42%
2011 25.2% 42%
2010 25.3% 42.1%
2009 25.4% 42.1%
2008 25.5% 42.1%
2007 25.5% 42%
2006 25.9% 42%
2005 26.7% 42%
2004 27.4% 42.1%
2003 28.1% 42.2%
2002 28.9% 42.3%
2001 29.6% 42.5%
2000 30.3% 42.8%
1999 31% 43.4%
1998 31.6% 43.9%
1997 32.2% 44.3%
1996 32.7% 44.7%
1995 33.3% 44.9%
1994 33.7% 45.1%
1993 34.1% 45.2%
1992 34.3% 45.2%
1991 34.4% 45.1%
1990 34.4% 45.1%
1989 34.6% 45%
1988 34.7% 45%
1987 34.9% 44.9%
1986 35.2% 44.7%
1985 35.7% 44.5%
1984 36.3% 44.4%
1983 36.9% 44.5%
1982 37.6% 44.5%
1981 38.1% 44.7%
1980 38.5% 44.9%
1979 38.9% 45.1%
1978 39.3% 45.2%
1977 39.9% 45.3%
1976 40.6% 45.4%
1975 41.3% 45.5%
1974 42% 45.6%
1973 42.6% 45.7%
1972 43% 45.9%
1971 43.3% 46.1%
1970 43.6% 46.2%
1969 44.2% 45.8%
1968 44.8% 44.9%
1967 45.4% 44%
1966 46% 42.9%
1965 46.5% 41.6%
1964 46.6% 40.2%
1963 46.6% 38.5%
1962 46.1% 36.6%
1961 45.2% 34.3%
1960 44.1% 32.9%

Data sources: World Bank | Health (1960–2024, retrieved 2026-04-06); United Nations | World Population Prospects (2025–2100, retrieved 2026-03-10).

GeoRank.org/birth-rate/brunei/sao-tome-and-principe | CC BY

Children aged 0-14 make up 20.8% of the population in Brunei and 37.8% in Sao Tome and Principe in 2024, compared to 34.4% and 45.1% respectively in 1990.

Demographics of Brunei and Sao Tome and Principe compared.

Fertility rates around the globe

1x

Data sources: World Bank | Health (1960–2023, retrieved 2026-04-06).

GeoRank.org/birth-rate/brunei/sao-tome-and-principe | CC BY

Maternal mortality chart: Brunei vs Sao Tome and Principe

Brunei
Sao Tome and Principe
1x
Year Maternal mortality per 100K births
Brunei Sao Tome
2023 36 75
2022 88 82
2021 44 98
2020 39 92
2019 38 95
2018 39 100
2017 39 110
2016 39 119
2015 39 128
2014 40 138
2013 40 150
2012 40 158
2011 40 164
2010 40 170
2009 40 172
2008 40 174
2007 41 174
2006 42 177
2005 43 181
2004 44 177
2003 45 178
2002 46 179
2001 46 178
2000 48 180
1999 50 179
1998 51 175
1997 52 173
1996 54 171
1995 55 172
1994 58 168
1993 59 166
1992 62 164
1991 65 166
1990 68 164
1989 71 167
1988 73 157
1987 75 161
1986 78 175
1985 79 159

Data sources: World Bank | Gender (1985–2023, retrieved 2026-04-06).

GeoRank.org/birth-rate/brunei/sao-tome-and-principe | CC BY

The maternal mortality rate, which is the probability of dying during childbirth or within 42 days of pregnancy termination, is 36 deaths per 100,000 live births in Brunei, compared to 75 deaths in Sao Tome and Principe.

Under-five mortality rates

Brunei
Sao Tome and Principe

Probability that a newborn baby will die before reaching age five

1x
Year Under 5 mortality rate
Brunei Sao Tome
2023 0.94% 1.39%
2022 0.95% 1.46%
2021 0.96% 1.53%
2020 0.97% 1.6%
2019 0.98% 1.7%
2018 0.99% 1.81%
2017 1% 1.95%
2016 1% 2.11%
2015 1% 2.31%
2014 1% 2.54%
2013 0.99% 2.77%
2012 0.99% 3.04%
2011 0.98% 3.33%
2010 0.97% 3.63%
2009 0.96% 3.95%
2008 0.96% 4.3%
2007 0.95% 4.68%
2006 0.95% 5.11%
2005 0.95% 5.56%
2004 0.95% 6.05%
2003 0.96% 6.57%
2002 0.98% 7.1%
2001 1% 7.66%
2000 1.03% 8.21%
1999 1.07% 8.76%
1998 1.1% 9.26%
1997 1.15% 9.73%
1996 1.19% 10.1%
1995 1.23% 10.4%
1994 1.27% 10.7%
1993 1.3% 10.8%
1992 1.31% 10.9%
1991 1.32% 10.9%
1990 1.33% 10.8%
1989 1.35% 10.7%
1988 1.38% 10.6%
1987 1.42% 10.4%
1986 1.48% 11.4%
1985 1.57% 9.99%
1984 1.67% 9.77%
1983 1.79% 9.56%
1982 1.93% 9.37%
1981 2.09% 9.21%
1980 2.28% 9.1%
1979 2.48% 9.02%
1978 2.71% 8.96%
1977 2.95% 8.93%
1976 3.21% 8.89%
1975 3.49% 8.85%
1974 3.77% 8.79%
1973 4.06% 8.73%
1972 4.35% 8.67%
1971 4.64% 8.63%
1970 4.91% 8.64%
1969 5.16% 8.71%
1968 5.42% 8.85%
1967 5.69% 9.04%
1966 5.98% 9.29%
1965 6.32% 9.56%
1964 6.7% -
1963 7.15% -
1962 7.66% -
1961 8.24% -
1960 8.9% -

Data sources: World Bank | Health (1960–2023, retrieved 2026-04-06).

GeoRank.org/birth-rate/brunei/sao-tome-and-principe | CC BY

The chance that a newborn baby will die before reaching age five is 0.94% in Brunei and 1.39% in Sao Tome and Principe. Above is a chart with historical data on under-five mortality rates.

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Data sources:

  1. World Bank | Health (1960–2024, retrieved 2026-04-06)
  2. United Nations | World Population Prospects (2025–2100, retrieved 2026-03-10)
  3. Central Intelligence Agency (CIA) (2025, retrieved 2026-02-20)

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