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Fertility & birth rates in San Marino and Tonga

Updated on by Georank team

San Marino has an annual birth rate of 5.6 births per 1,000 people, compared to 23.1 for Tonga. The average number of children a woman is expected to have during her lifetime — the fertility rate, is 1.15 in San Marino and 3.13 in Tonga — 172.3% difference.

1960 vs 2023, the fertility rate has decreased by 52.7% in San Marino and by 53% in Tonga — in 1960, it was 2.43 and 6.65, respectively.

  • San Marino is ranked 195/196 by birth rate compared to 58/196 for Tonga.
  • The mean age for first-time mothers is 31.5 years in San Marino, compared to 24.9 years in Tonga.
  • The mean age at childbearing (for all the births, not just the first) is 32.8 in San Marino — it's 29.9 in Tonga.
  • Annual births per 1,000 women ages 15-19 (adolescent birth rate or teenage mother rate) is 1.16 in San Marino vs 24.8 in Tonga.
  • In San Marino, 19.7% of the population is composed of women of reproductive age (15-49), compared to 25.6% in Tonga.

Fertility rate in San Marino vs Tonga by year

San Marino
Tonga
1x
Year Fertility rate
San Marino Tonga
2023 1.15 3.13
2022 1.14 3.17
2021 1.13 3.2
2020 1.11 3.23
2019 1.1 3.27
2018 1.08 3.33
2017 1.05 3.39
2016 1.13 3.46
2015 1.2 3.54
2014 1.26 3.62
2013 1.48 3.7
2012 1.29 3.77
2011 1.46 3.83
2010 1.46 3.88
2009 1.36 3.95
2008 1.52 4.01
2007 1.26 4.09
2006 1.24 4.14
2005 1.2 4.2
2004 1.3 4.19
2003 1.3 4.18
2002 1.43 4.14
2001 1.52 4.13
2000 1.4 4.16
1999 1.29 4.23
1998 1.26 4.31
1997 1.24 4.38
1996 1.21 4.46
1995 1.17 4.56
1994 1.14 4.66
1993 1.12 4.73
1992 1.15 4.79
1991 1.17 4.85
1990 1.16 4.93
1989 1.15 5.01
1988 1.14 5.1
1987 1.14 5.19
1986 1.15 5.27
1985 1.17 5.34
1984 1.2 5.41
1983 1.25 5.45
1982 1.3 5.5
1981 1.41 5.55
1980 1.53 5.6
1979 1.63 5.65
1978 1.77 5.68
1977 1.87 5.7
1976 1.95 5.73
1975 2.05 5.75
1974 2.13 5.77
1973 2.23 5.8
1972 2.29 5.86
1971 2.33 5.96
1970 2.32 6.07
1969 2.31 6.17
1968 2.3 6.23
1967 2.31 6.29
1966 2.33 6.35
1965 2.33 6.41
1964 2.37 6.46
1963 2.4 6.52
1962 2.43 6.57
1961 2.68 6.61
1960 2.43 6.65

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

GeoRank.org/birth-rate/san-marino/tonga | CC BY

According to the latest available data on birth rates, the fertility rate in San Marino was 1.15 children per woman in 2023, compared to 3.13 in Tonga in 2023. The replacement level is considered to be 2.1 children per woman.

Check San Marino vs Tonga population clock for a dynamic visualization of the changing population.

Natural population change by year

San Marino
Tonga
1x
Year Natural population change
San Marino Tonga
2023 -92 1,744
2022 -58 1,772
2021 -99 1,773
2020 -122 1,816
2019 -17 1,841
2018 -11 1,873
2017 -51 1,912
2016 10 1,989
2015 36 2,064
2014 46 2,135
2013 73 2,199
2012 54 2,255
2011 105 2,298
2010 126 2,332
2009 145 2,358
2008 159 2,397
2007 69 2,423
2006 75 2,459
2005 66 2,495
2004 121 2,478
2003 79 2,448
2002 112 2,396
2001 132 2,358
2000 107 2,346
1999 80 2,352
1998 74 2,344
1997 71 2,332
1996 63 2,393
1995 51 2,476
1994 43 2,547
1993 38 2,594
1992 42 2,622
1991 45 2,637
1990 41 2,641
1989 36 2,644
1988 34 2,649
1987 31 2,646
1986 40 2,704
1985 44 2,762
1984 46 2,814
1983 54 2,840
1982 61 2,853
1981 76 2,882
1980 90 2,885
1979 104 2,884
1978 121 2,862
1977 117 2,822
1976 126 2,769
1975 141 2,709
1974 153 2,650
1973 167 2,617
1972 173 2,605
1971 174 2,611
1970 173 2,628
1969 173 2,632
1968 171 2,614
1967 171 2,603
1966 173 2,550
1965 169 2,498
1964 163 2,445
1963 158 2,394
1962 155 2,343
1961 174 2,284
1960 139 2,230

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

GeoRank.org/birth-rate/san-marino/tonga | 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 -0.27% in San Marino and +1.67% in Tonga.

For the past 10 years, the annual natural population change has been -0.1% in San Marino and +1.79% in Tonga.

Birth rate in San Marino vs Tonga by year

San Marino
Tonga

Annual births per 1,000 people

1x
Year Annual births per 1,000 people
San Marino Tonga
2023 5.6 23.1
2022 6.1 23.4
2021 6.2 23.5
2020 6.4 23.6
2019 6.7 23.8
2018 6.8 24.1
2017 6.7 24.5
2016 7.9 25.2
2015 8.2 25.8
2014 9.1 26.4
2013 9.7 26.9
2012 8.7 27.3
2011 10 27.7
2010 10.3 28
2009 10.7 28.4
2008 11 28.7
2007 9.4 29
2006 10 29.5
2005 9.5 30
2004 10.4 30
2003 10.7 29.9
2002 11.9 29.5
2001 12.8 29.4
2000 12 29.4
1999 11.1 29.6
1998 11 29.7
1997 11 29.8
1996 10.8 30.6
1995 10.4 31.4
1994 10.2 32.2
1993 10 32.7
1992 10.2 33
1991 10.3 33.2
1990 10.1 33.3
1989 9.88 33.4
1988 9.73 33.5
1987 9.6 33.7
1986 9.48 34.4
1985 9.52 34.9
1984 9.63 35.4
1983 9.87 35.6
1982 10.2 35.8
1981 10.8 36
1980 11.5 36.1
1979 12.2 36.1
1978 13.1 36
1977 13 35.7
1976 14 35.6
1975 14.8 35.8
1974 15.4 36
1973 16.2 36.5
1972 16.5 37
1971 16.7 37.8
1970 17 38.8
1969 17.1 39.6
1968 17.1 40.3
1967 17.2 41
1966 17.5 41.4
1965 17.4 41.9
1964 17.4 42.4
1963 17.5 42.9
1962 17.7 43.4
1961 19.4 43.9
1960 17.5 44.3

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

GeoRank.org/birth-rate/san-marino/tonga | CC BY

The latest reported birth rate per 1,000 people in 2023 was 5.6 in San Marino and 23.1 in Tonga, compared with 17.5 and 44.3, respectively, in 1960.

Birth rate data compared

San Marino Tonga
Fertility rate 1.15 3.13
Fertility rate rank 188/196 54/196
Birth rate 5.6 23.1
Birth rate rank 195/196 58/196
Population change due to births and deaths -92 +1,744
Natural population change rank 159/196 137/196
Natural population change rate -0.27% +1.67%
Population growth +0.35% -0.4%
Population growth rank 145/197 183/197
Age at first childbirth 31.5 years 24.9 years
Average age at childbearing 32.8 years 29.9 years
Annual births per 1,000 women ages 15-19 0 25
Annual births per 1,000 women ages 20-29 34.4 144.7
Annual births per 1,000 women ages 30+ 11 40.5
Female of reproductive age (15-49), share of population 19.7% 25.6%
Any modern method of contraceptive prevalence among married women ages 15-49 n/a 25.2%
Share of births attended by skilled health staff n/a 98.3%
Maternal mortality per live birth 0.008% 0.07%
Neonatal mortality rate (before reaching 28 days of age) 0.06% 0.43%
Infant mortality rate (before reaching 1 year of age) 0.14% 0.8%
Mortality rate before reaching 5 years of age 0.14% 0.99%
Life expectancy 86 years 73.4 years

Children 0-14 years as share of population

San Marino
Factual

UN forecast
Tonga
Factual

UN forecast
1x
Year Young
San Marino Tonga
2100 11.9% 17.5%
2099 11.9% 17.6%
2098 11.9% 17.7%
2097 12% 17.7%
2096 12% 17.9%
2095 12% 18%
2094 12.1% 18.1%
2093 12.1% 18.3%
2092 12.2% 18.4%
2091 12.2% 18.6%
2090 12.3% 18.8%
2089 12.3% 19%
2088 12.3% 19.3%
2087 12.4% 19.5%
2086 12.4% 19.7%
2085 12.4% 20%
2084 12.4% 20.2%
2083 12.4% 20.4%
2082 12.4% 20.7%
2081 12.3% 20.9%
2080 12.3% 21.1%
2079 12.2% 21.3%
2078 12.2% 21.5%
2077 12.1% 21.7%
2076 12% 21.9%
2075 11.9% 22%
2074 11.8% 22.2%
2073 11.7% 22.3%
2072 11.6% 22.4%
2071 11.5% 22.6%
2070 11.5% 22.7%
2069 11.4% 22.8%
2068 11.4% 23%
2067 11.3% 23.2%
2066 11.3% 23.4%
2065 11.3% 23.6%
2064 11.3% 23.8%
2063 11.3% 24.1%
2062 11.4% 24.4%
2061 11.4% 24.7%
2060 11.5% 25%
2059 11.5% 25.4%
2058 11.6% 25.8%
2057 11.6% 26.2%
2056 11.7% 26.6%
2055 11.7% 27%
2054 11.7% 27.4%
2053 11.8% 27.8%
2052 11.7% 28.2%
2051 11.7% 28.5%
2050 11.7% 28.9%
2049 11.6% 29.1%
2048 11.5% 29.4%
2047 11.4% 29.6%
2046 11.2% 29.7%
2045 11.1% 29.8%
2044 11% 29.9%
2043 10.8% 30%
2042 10.6% 30.1%
2041 10.5% 30.1%
2040 10.3% 30.2%
2039 10.2% 30.2%
2038 10% 30.3%
2037 9.93% 30.4%
2036 9.9% 30.6%
2035 9.89% 30.7%
2034 9.93% 30.9%
2033 9.99% 31.1%
2032 10% 31.4%
2031 10.2% 31.8%
2030 10.4% 32.3%
2029 10.6% 33%
2028 11% 33.6%
2027 11.2% 34.1%
2026 11.6% 34.6%
2025 12.1% 35.2%
2024 12.3% 35.4%
2023 12.7% 35.6%
2022 13% 35.6%
2021 13.2% 35.7%
2020 13.4% 35.8%
2019 13.7% 36%
2018 14% 36.2%
2017 14.4% 36.4%
2016 14.7% 36.5%
2015 14.9% 36.7%
2014 15.1% 36.9%
2013 15.1% 37.1%
2012 15.2% 37.2%
2011 15.3% 37.4%
2010 15.4% 37.6%
2009 15.4% 37.8%
2008 15.4% 38%
2007 15.3% 38.3%
2006 15.3% 38.3%
2005 15.3% 38.3%
2004 15.2% 38.2%
2003 15.2% 38.1%
2002 15.1% 38.1%
2001 15% 38.2%
2000 14.9% 38.3%
1999 14.9% 38.6%
1998 14.9% 38.9%
1997 14.9% 39.3%
1996 14.9% 39.7%
1995 14.9% 39.9%
1994 15% 40.1%
1993 15.2% 40.3%
1992 15.4% 40.5%
1991 15.8% 40.6%
1990 16.1% 40.8%
1989 16.5% 40.9%
1988 17% 41.2%
1987 17.5% 41.5%
1986 18% 41.7%
1985 18.6% 42%
1984 19.1% 42.4%
1983 19.7% 42.9%
1982 20.3% 43.4%
1981 21% 43.9%
1980 21.7% 44.3%
1979 22.4% 44.8%
1978 23% 45.3%
1977 23.9% 45.8%
1976 24.7% 46.1%
1975 25.1% 46.2%
1974 25.4% 46.2%
1973 25.7% 46.2%
1972 25.9% 46.3%
1971 26% 46.4%
1970 25.9% 46.4%
1969 25.6% 46.3%
1968 25.3% 46.2%
1967 24.9% 46%
1966 24.5% 45.9%
1965 24.3% 45.9%
1964 24.5% 45.9%
1963 24.8% 45.9%
1962 25% 45.8%
1961 25% 45.7%
1960 25% 45.7%

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/san-marino/tonga | CC BY

Children aged 0-14 make up 12.3% of the population in San Marino and 35.4% in Tonga in 2024, compared to 16.1% and 40.8% respectively in 1990.

Demographics of San Marino and Tonga compared.

Fertility rates around the globe

1x

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

GeoRank.org/birth-rate/san-marino/tonga | CC BY

Maternal mortality chart: San Marino vs Tonga

San Marino
Tonga
1x
Year Maternal mortality per 100K births
San Marino Tonga
2023 8 67
2022 22 72
2021 35 76
2020 46 74
2019 7 73
2018 7 74
2017 7 77
2016 7 78
2015 8 79
2014 8 80
2013 8 80
2012 8 83
2011 8 84
2010 8 85
2009 8 91
2008 8 88
2007 8 88
2006 12 89
2005 12 92
2004 13 92
2003 13 95
2002 14 98
2001 14 98
2000 14 100
1999 9 99
1998 9 104
1997 10 111
1996 10 113
1995 10 117
1994 10 123
1993 11 127
1992 11 129
1991 11 134
1990 11 138
1989 12 139
1988 12 145
1987 12 147
1986 12 149
1985 12 148

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

GeoRank.org/birth-rate/san-marino/tonga | CC BY

The maternal mortality rate, which is the probability of dying during childbirth or within 42 days of pregnancy termination, is 8 deaths per 100,000 live births in San Marino, compared to 67 deaths in Tonga.

Under-five mortality rates

San Marino
Tonga

Probability that a newborn baby will die before reaching age five

1x
Year Under 5 mortality rate
San Marino Tonga
2023 0.14% 0.99%
2022 0.15% 1.02%
2021 0.15% 1.05%
2020 0.16% 1.08%
2019 0.17% 1.1%
2018 0.17% 1.12%
2017 0.18% 1.15%
2016 0.19% 1.17%
2015 0.2% 1.19%
2014 0.21% 1.22%
2013 0.23% 1.24%
2012 0.24% 1.26%
2011 0.25% 1.29%
2010 0.27% 1.31%
2009 0.28% 1.34%
2008 0.3% 1.37%
2007 0.32% 1.41%
2006 0.34% 1.44%
2005 0.37% 1.48%
2004 0.39% 1.52%
2003 0.42% 1.56%
2002 0.46% 1.61%
2001 0.5% 1.65%
2000 0.54% 1.7%
1999 0.58% 1.74%
1998 0.63% 1.78%
1997 0.69% 1.81%
1996 0.75% 1.85%
1995 0.81% 1.89%
1994 0.89% 1.94%
1993 0.97% 2%
1992 1.06% 2.06%
1991 1.16% 2.14%
1990 1.27% 2.21%
1989 1.39% 2.29%
1988 1.52% 2.37%
1987 1.66% 2.44%
1986 1.82% 2.51%
1985 1.99% 2.57%
1984 - 2.63%
1983 - 2.7%
1982 - 2.78%
1981 - 2.87%
1980 - 2.97%
1979 - 3.09%
1978 - 3.22%
1977 - 3.37%
1976 - 3.53%
1975 - 3.71%
1974 - 3.9%
1973 - 4.11%
1972 - 4.35%
1971 - 4.61%
1970 - 4.91%
1969 - 5.25%
1968 - 5.63%
1967 - 6.03%
1966 - 6.45%
1965 - 6.89%
1964 - 7.35%
1963 - 7.83%

Data sources: World Bank | Health (1963–2023, retrieved 2026-04-06).

GeoRank.org/birth-rate/san-marino/tonga | CC BY

The chance that a newborn baby will die before reaching age five is 0.14% in San Marino and 0.99% in Tonga. 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) (2022, retrieved 2026-03-10)
  4. Central Intelligence Agency (CIA) (2025, retrieved 2026-02-20)

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