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Fertility & birth rates in Kiribati and Portugal

Updated on by Georank team

Kiribati has an annual birth rate of 25.8 births per 1,000 people, compared to 8.1 for Portugal. The average number of children a woman is expected to have during her lifetime — the fertility rate, is 3.15 in Kiribati and 1.44 in Portugal — 54.2% difference.

1960 vs 2023, the fertility rate has decreased by 51.1% in Kiribati and by 54.4% in Portugal — in 1960, it was 6.44 and 3.16, respectively.

  • Kiribati is ranked 50/196 by birth rate compared to 175/196 for Portugal.
  • The mean age for first-time mothers is 23.1 years in Kiribati, compared to 30.2 years in Portugal.
  • The mean age at childbearing (for all the births, not just the first) is 29 in Kiribati — it's 32.1 in Portugal.
  • Annual births per 1,000 women ages 15-19 (adolescent birth rate or teenage mother rate) is 44 in Kiribati vs 6.99 in Portugal.
  • In Kiribati, 26% of the population is composed of women of reproductive age (15-49), compared to 20.6% in Portugal.

Fertility rate in Kiribati vs Portugal by year

Kiribati
Portugal
1x
Year Fertility rate
Kiribati Portugal
2023 3.15 1.44
2022 3.18 1.43
2021 3.22 1.35
2020 3.25 1.42
2019 3.29 1.44
2018 3.32 1.42
2017 3.34 1.38
2016 3.38 1.37
2015 3.44 1.31
2014 3.52 1.24
2013 3.64 1.21
2012 3.77 1.28
2011 3.88 1.35
2010 3.9 1.39
2009 3.91 1.34
2008 3.9 1.39
2007 3.87 1.35
2006 3.82 1.37
2005 3.76 1.41
2004 3.73 1.4
2003 3.7 1.44
2002 3.81 1.46
2001 3.96 1.45
2000 4.07 1.55
1999 4.18 1.5
1998 4.29 1.47
1997 4.37 1.47
1996 4.43 1.44
1995 4.42 1.41
1994 4.44 1.45
1993 4.49 1.52
1992 4.57 1.54
1991 4.64 1.56
1990 4.67 1.56
1989 4.69 1.57
1988 4.73 1.61
1987 4.81 1.62
1986 4.87 1.66
1985 4.91 1.72
1984 4.91 1.9
1983 4.91 1.95
1982 4.95 2.07
1981 4.96 2.13
1980 4.96 2.25
1979 4.97 2.31
1978 4.97 2.45
1977 4.96 2.69
1976 4.96 2.82
1975 5.02 2.75
1974 5.09 2.7
1973 5.2 2.77
1972 5.37 2.86
1971 5.55 3
1970 5.71 3.01
1969 5.85 3.12
1968 5.98 3.12
1967 6.11 3.16
1966 6.23 3.16
1965 6.26 3.15
1964 6.29 3.21
1963 6.35 3.12
1962 6.42 3.23
1961 6.48 3.21
1960 6.44 3.16

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

GeoRank.org/birth-rate/kiribati/portugal | CC BY

According to the latest available data on birth rates, the fertility rate in Kiribati was 3.15 children per woman in 2023, compared to 1.44 in Portugal in 2023. The replacement level is considered to be 2.1 children per woman.

Check Kiribati vs Portugal population clock for a dynamic visualization of the changing population.

Natural population change by year

Kiribati
Portugal
1x
Year Natural population change
Kiribati Portugal
2023 2,487 -32,792
2022 2,522 -40,694
2021 2,408 -45,592
2020 2,497 -39,129
2019 2,560 -24,687
2018 2,561 -25,709
2017 2,549 -23,691
2016 2,546 -23,749
2015 2,555 -23,823
2014 2,577 -22,882
2013 2,629 -24,052
2012 2,678 -17,875
2011 2,709 -5,279
2010 2,644 -4,230
2009 2,573 -5,284
2008 2,493 0
2007 2,393 -1,055
2006 2,285 3,156
2005 2,188 2,101
2004 2,118 7,339
2003 2,045 4,184
2002 2,074 8,335
2001 2,121 8,290
2000 2,153 15,435
1999 2,186 8,175
1998 2,210 7,112
1997 2,220 8,087
1996 2,217 4,026
1995 2,183 4,011
1994 2,168 9,991
1993 2,161 7,972
1992 2,173 13,933
1991 2,176 12,948
1990 2,127 13,976
1989 2,073 22,011
1988 2,022 24,047
1987 1,982 28,084
1986 1,933 31,102
1985 1,881 33,077
1984 1,813 45,983
1983 1,748 47,798
1982 1,697 58,479
1981 1,635 56,152
1980 1,571 63,481
1979 1,509 67,628
1978 1,480 70,731
1977 1,426 84,156
1976 1,425 85,138
1975 1,423 81,841
1974 1,430 74,412
1973 1,409 76,835
1972 1,406 83,715
1971 1,406 82,980
1970 1,388 87,672
1969 1,367 89,329
1968 1,393 100,737
1967 1,417 106,495
1966 1,437 107,171
1965 1,376 115,182
1964 1,318 120,170
1963 1,273 113,783
1962 1,233 123,217
1961 1,199 117,867
1960 1,141 118,693

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

GeoRank.org/birth-rate/kiribati/portugal | 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 +1.88% in Kiribati and -0.31% in Portugal.

For the past 10 years, the annual natural population change has been +2.05% in Kiribati and -0.29% in Portugal.

Birth rate in Kiribati vs Portugal by year

Kiribati
Portugal

Annual births per 1,000 people

1x
Year Annual births per 1,000 people
Kiribati Portugal
2023 25.8 8.1
2022 26.4 8
2021 26.9 7.6
2020 27.4 8.1
2019 27.8 8.4
2018 28.1 8.4
2017 28.3 8.3
2016 28.5 8.4
2015 28.9 8.2
2014 29.3 7.9
2013 30 7.9
2012 30.8 8.5
2011 31.4 9.2
2010 31.2 9.6
2009 31.1 9.4
2008 30.8 9.9
2007 30.3 9.7
2006 29.7 10
2005 29.2 10.4
2004 28.9 10.4
2003 28.6 10.8
2002 29.4 11
2001 30.5 10.9
2000 31.5 11.7
1999 32.5 11.4
1998 33.4 11.2
1997 34.1 11.2
1996 34.8 11
1995 35 10.7
1994 35.4 10.9
1993 35.9 11.4
1992 36.8 11.5
1991 37.6 11.7
1990 37.7 11.7
1989 37.9 11.8
1988 38.2 12.2
1987 38.6 12.3
1986 38.8 12.6
1985 38.9 13
1984 38.6 14.3
1983 38.1 14.5
1982 37.9 15.2
1981 37.4 15.4
1980 36.8 16.2
1979 36.2 16.6
1978 36.2 17.5
1977 35.7 19.1
1976 35.4 20
1975 35.4 19.8
1974 35.7 19.6
1973 35.7 20
1972 36.5 20.2
1971 37.4 21
1970 38.1 20.8
1969 38.7 21.7
1968 40.1 22.1
1967 41.2 22.8
1966 42.2 23.2
1965 42 23.4
1964 42.2 24
1963 42.6 23.5
1962 43.1 24.5
1961 43.6 24.4
1960 43.5 24.1

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

GeoRank.org/birth-rate/kiribati/portugal | CC BY

The latest reported birth rate per 1,000 people in 2023 was 25.8 in Kiribati and 8.1 in Portugal, compared with 43.5 and 24.1, respectively, in 1960.

Birth rate data compared

Kiribati Portugal
Fertility rate 3.15 1.44
Fertility rate rank 53/196 157/196
Birth rate 25.8 8.1
Birth rate rank 50/196 175/196
Population change due to births and deaths +2,487 -32,792
Natural population change rank 135/196 179/196
Natural population change rate +1.88% -0.31%
Population growth +1.5% +1.1%
Population growth rank 72/197 94/197
Age at first childbirth 23.1 years 30.2 years
Average age at childbearing 29 years 32.1 years
Annual births per 1,000 women ages 15-19 45.3 5.74
Annual births per 1,000 women ages 20-29 152.8 48.5
Annual births per 1,000 women ages 30+ 45.7 14.2
Female of reproductive age (15-49), share of population 26% 20.6%
Any modern method of contraceptive prevalence among married women ages 15-49 27.3% 37.7%
Share of births attended by skilled health staff 91.9% 98.6%
Maternal mortality per live birth 0.08% 0.02%
Neonatal mortality rate (before reaching 28 days of age) 2.24% 0.16%
Infant mortality rate (before reaching 1 year of age) 3.97% 0.26%
Mortality rate before reaching 5 years of age 5.51% 0.32%
Life expectancy 66.9 years 82.9 years

Children 0-14 years as share of population

Kiribati
Factual

UN forecast
Portugal
Factual

UN forecast
1x
Year Young
Kiribati Portugal
2100 19.5% 13.8%
2099 19.6% 13.8%
2098 19.7% 13.8%
2097 19.8% 13.8%
2096 20% 13.9%
2095 20.1% 13.9%
2094 20.2% 13.9%
2093 20.3% 14%
2092 20.5% 14%
2091 20.6% 14%
2090 20.7% 14.1%
2089 20.9% 14.1%
2088 21% 14.1%
2087 21.2% 14.1%
2086 21.3% 14.2%
2085 21.4% 14.2%
2084 21.6% 14.2%
2083 21.7% 14.2%
2082 21.8% 14.2%
2081 22% 14.2%
2080 22.1% 14.2%
2079 22.2% 14.2%
2078 22.3% 14.2%
2077 22.5% 14.1%
2076 22.6% 14.1%
2075 22.7% 14.1%
2074 22.9% 14%
2073 23% 14%
2072 23.1% 13.9%
2071 23.3% 13.9%
2070 23.4% 13.8%
2069 23.6% 13.8%
2068 23.8% 13.7%
2067 23.9% 13.7%
2066 24.1% 13.6%
2065 24.3% 13.6%
2064 24.5% 13.5%
2063 24.7% 13.5%
2062 25% 13.5%
2061 25.2% 13.5%
2060 25.4% 13.5%
2059 25.6% 13.5%
2058 25.8% 13.5%
2057 26.1% 13.5%
2056 26.3% 13.5%
2055 26.5% 13.5%
2054 26.7% 13.5%
2053 26.9% 13.5%
2052 27.1% 13.5%
2051 27.3% 13.5%
2050 27.5% 13.5%
2049 27.7% 13.5%
2048 27.9% 13.4%
2047 28% 13.4%
2046 28.2% 13.4%
2045 28.4% 13.3%
2044 28.5% 13.3%
2043 28.7% 13.2%
2042 28.9% 13.1%
2041 29.1% 13.1%
2040 29.3% 13%
2039 29.5% 13%
2038 29.8% 13%
2037 30.1% 12.9%
2036 30.4% 12.8%
2035 30.8% 12.8%
2034 31.1% 12.7%
2033 31.5% 12.7%
2032 31.8% 12.7%
2031 32.2% 12.7%
2030 32.6% 12.7%
2029 32.9% 12.6%
2028 33.3% 12.6%
2027 33.7% 12.6%
2026 34.2% 12.7%
2025 34.6% 12.8%
2024 34.7% 12.8%
2023 34.9% 12.9%
2022 35.1% 13%
2021 35.2% 13.1%
2020 35.2% 13.3%
2019 35.1% 13.5%
2018 35.1% 13.7%
2017 35% 13.9%
2016 35% 14.1%
2015 35.2% 14.3%
2014 35.4% 14.6%
2013 35.7% 14.8%
2012 36.1% 14.9%
2011 36.4% 15%
2010 36.6% 15.2%
2009 36.8% 15.4%
2008 37% 15.5%
2007 37.3% 15.6%
2006 37.6% 15.8%
2005 38% 15.9%
2004 38.4% 16%
2003 38.9% 16.1%
2002 39.3% 16.1%
2001 39.8% 16.2%
2000 40.1% 16.4%
1999 40.5% 16.6%
1998 40.8% 16.8%
1997 41% 17.1%
1996 41.1% 17.4%
1995 41.2% 17.8%
1994 41.2% 18.2%
1993 41% 18.6%
1992 40.8% 19.1%
1991 40.5% 19.7%
1990 40.2% 20.5%
1989 39.9% 21.2%
1988 39.7% 21.9%
1987 39.4% 22.5%
1986 39.2% 23.1%
1985 39.2% 23.7%
1984 39.2% 24.1%
1983 39.5% 24.5%
1982 39.9% 25%
1981 40.5% 25.4%
1980 41.1% 25.9%
1979 41.8% 26.4%
1978 42.3% 26.8%
1977 42.8% 27.1%
1976 43.2% 27.2%
1975 43.7% 27.4%
1974 44.2% 27.7%
1973 44.6% 27.9%
1972 44.8% 28.2%
1971 44.8% 28.4%
1970 44.9% 28.7%
1969 45% 29.1%
1968 44.9% 29.2%
1967 44.5% 29.2%
1966 44.1% 29.2%
1965 43.9% 29.1%
1964 44% 29.1%
1963 44% 29.1%
1962 43.8% 29.1%
1961 43.5% 29.1%
1960 43.2% 29.3%

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/kiribati/portugal | CC BY

Children aged 0-14 make up 34.7% of the population in Kiribati and 12.8% in Portugal in 2024, compared to 40.2% and 20.5% respectively in 1990.

Demographics of Kiribati and Portugal compared.

Fertility rates around the globe

1x

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

GeoRank.org/birth-rate/kiribati/portugal | CC BY

Maternal mortality chart: Kiribati vs Portugal

Kiribati
Portugal
1x
Year Maternal mortality per 100K births
Kiribati Portugal
2023 80 15
2022 86 16
2021 122 19
2020 89 14
2019 89 15
2018 87 14
2017 90 13
2016 88 12
2015 90 11
2014 91 11
2013 93 10
2012 98 10
2011 98 10
2010 102 10
2009 99 9
2008 100 9
2007 101 8
2006 102 8
2005 104 8
2004 106 8
2003 105 8
2002 109 9
2001 113 9
2000 119 9
1999 121 10
1998 126 11
1997 132 12
1996 141 12
1995 148 12
1994 150 13
1993 162 15
1992 175 16
1991 188 17
1990 199 17
1989 212 18
1988 220 18
1987 231 19
1986 232 19
1985 246 20

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

GeoRank.org/birth-rate/kiribati/portugal | CC BY

The maternal mortality rate, which is the probability of dying during childbirth or within 42 days of pregnancy termination, is 80 deaths per 100,000 live births in Kiribati, compared to 15 deaths in Portugal.

Under-five mortality rates

Kiribati
Portugal

Probability that a newborn baby will die before reaching age five

1x
Year Under 5 mortality rate
Kiribati Portugal
2023 5.51% 0.32%
2022 5.65% 0.32%
2021 5.76% 0.33%
2020 5.86% 0.34%
2019 5.93% 0.35%
2018 5.98% 0.35%
2017 5.99% 0.36%
2016 5.95% 0.36%
2015 5.89% 0.36%
2014 5.84% 0.36%
2013 5.8% 0.36%
2012 5.78% 0.37%
2011 5.79% 0.37%
2010 5.82% 0.38%
2009 5.87% 0.39%
2008 5.93% 0.4%
2007 5.99% 0.42%
2006 6.03% 0.44%
2005 6.07% 0.47%
2004 6.13% 0.5%
2003 6.2% 0.55%
2002 6.31% 0.61%
2001 6.46% 0.66%
2000 6.64% 0.72%
1999 6.83% 0.77%
1998 7.02% 0.82%
1997 7.22% 0.86%
1996 7.42% 0.92%
1995 7.64% 0.98%
1994 7.87% 1.05%
1993 8.13% 1.14%
1992 8.44% 1.25%
1991 8.77% 1.36%
1990 9.13% 1.47%
1989 9.5% 1.59%
1988 9.87% 1.7%
1987 10.2% 1.82%
1986 10.6% 1.93%
1985 10.9% 2.04%
1984 11.1% 2.16%
1983 11.4% 2.29%
1982 11.6% 2.43%
1981 11.7% 2.58%
1980 11.9% 2.75%
1979 12% 2.97%
1978 12.2% 3.24%
1977 12.3% 3.57%
1976 12.4% 3.94%
1975 12.5% 4.35%
1974 12.7% 4.79%
1973 13% 5.27%
1972 13.3% 5.78%
1971 13.7% 6.3%
1970 14.1% 6.81%
1969 14.6% 7.22%
1968 15.2% 7.51%
1967 15.8% 7.76%
1966 16.4% 8.09%
1965 17.1% 8.53%
1964 17.7% 9.1%
1963 18.3% 9.76%
1962 18.9% 10.4%
1961 19.5% 11%
1960 19.9% 11.4%

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

GeoRank.org/birth-rate/kiribati/portugal | CC BY

The chance that a newborn baby will die before reaching age five is 5.51% in Kiribati and 0.32% in Portugal. 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. United Nations Economic Commission for Europe (UNECE) (2023, retrieved 2026-03-10)
  4. Central Intelligence Agency (CIA) (2025, retrieved 2026-02-20)

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