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Fertility & birth rates in Mongolia and Tonga

Updated on by Georank team

Mongolia has an annual birth rate of 19 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 2.7 in Mongolia and 3.13 in Tonga — 15.9% difference.

1960 vs 2023, the fertility rate has decreased by 60.4% in Mongolia and by 53% in Tonga — in 1960, it was 6.82 and 6.65, respectively.

  • Mongolia is ranked 81/196 by birth rate compared to 58/196 for Tonga.
  • The mean age for first-time mothers is 20.5 years in Mongolia, compared to 24.9 years in Tonga.
  • The mean age at childbearing (for all the births, not just the first) is 29.3 in Mongolia — it's 29.9 in Tonga.
  • Annual births per 1,000 women ages 15-19 (adolescent birth rate or teenage mother rate) is 19.7 in Mongolia vs 24.8 in Tonga.
  • In Mongolia, 24.2% of the population is composed of women of reproductive age (15-49), compared to 25.6% in Tonga.

Fertility rate in Mongolia vs Tonga by year

Mongolia
Tonga
1x
Year Fertility rate
Mongolia Tonga
2023 2.7 3.13
2022 2.7 3.17
2021 2.8 3.2
2020 2.9 3.23
2019 3 3.27
2018 2.9 3.33
2017 2.8 3.39
2016 3 3.46
2015 3 3.54
2014 3.1 3.62
2013 3 3.7
2012 2.7 3.77
2011 2.6 3.83
2010 2.4 3.88
2009 2.8 3.95
2008 2.6 4.01
2007 2.3 4.09
2006 2.1 4.14
2005 2 4.2
2004 2 4.19
2003 2 4.18
2002 2.1 4.14
2001 2.2 4.13
2000 2.2 4.16
1999 2.3 4.23
1998 2.3 4.31
1997 2.4 4.38
1996 2.5 4.46
1995 2.77 4.56
1994 2.7 4.66
1993 2.5 4.73
1992 3.5 4.79
1991 4 4.85
1990 4.5 4.93
1989 4.42 5.01
1988 4.65 5.1
1987 4.83 5.19
1986 5.03 5.27
1985 5.26 5.34
1984 5.45 5.41
1983 5.63 5.45
1982 5.8 5.5
1981 5.98 5.55
1980 6.21 5.6
1979 6.42 5.65
1978 6.62 5.68
1977 6.79 5.7
1976 6.93 5.73
1975 7.07 5.75
1974 7.17 5.77
1973 7.24 5.8
1972 7.28 5.86
1971 7.3 5.96
1970 7.31 6.07
1969 7.34 6.17
1968 7.37 6.23
1967 7.39 6.29
1966 7.41 6.35
1965 7.38 6.41
1964 7.33 6.46
1963 7.24 6.52
1962 7.1 6.57
1961 6.96 6.61
1960 6.82 6.65

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

GeoRank.org/birth-rate/mongolia/tonga | CC BY

According to the latest available data on birth rates, the fertility rate in Mongolia was 2.7 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 Mongolia vs Tonga population clock for a dynamic visualization of the changing population.

Natural population change by year

Mongolia
Tonga
1x
Year Natural population change
Mongolia Tonga
2023 46,995 1,744
2022 47,730 1,772
2021 52,109 1,773
2020 60,888 1,816
2019 61,433 1,841
2018 60,635 1,873
2017 57,940 1,912
2016 62,086 1,989
2015 64,473 2,064
2014 66,078 2,135
2013 62,618 2,199
2012 55,942 2,255
2011 50,711 2,298
2010 44,914 2,332
2009 48,876 2,358
2008 45,843 2,397
2007 39,636 2,423
2006 33,609 2,459
2005 29,290 2,495
2004 28,418 2,478
2003 28,827 2,448
2002 30,439 2,396
2001 32,052 2,358
2000 32,753 2,346
1999 32,283 2,352
1998 31,757 2,344
1997 32,403 2,332
1996 33,741 2,393
1995 34,473 2,476
1994 34,711 2,547
1993 36,924 2,594
1992 42,437 2,622
1991 47,884 2,637
1990 49,443 2,641
1989 51,420 2,644
1988 51,588 2,649
1987 51,140 2,646
1986 50,329 2,704
1985 49,944 2,762
1984 48,562 2,814
1983 46,919 2,840
1982 45,179 2,853
1981 43,588 2,882
1980 42,343 2,885
1979 41,568 2,884
1978 40,276 2,862
1977 38,995 2,822
1976 37,670 2,769
1975 36,490 2,709
1974 35,297 2,650
1973 33,993 2,617
1972 32,727 2,605
1971 31,536 2,611
1970 30,558 2,628
1969 29,781 2,632
1968 29,017 2,614
1967 28,178 2,603
1966 27,338 2,550
1965 26,364 2,498
1964 25,317 2,445
1963 24,142 2,394
1962 22,960 2,343
1961 21,873 2,284
1960 20,726 2,230

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

GeoRank.org/birth-rate/mongolia/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 +1.35% in Mongolia and +1.67% in Tonga.

For the past 10 years, the annual natural population change has been +1.81% in Mongolia and +1.79% in Tonga.

Birth rate in Mongolia vs Tonga by year

Mongolia
Tonga

Annual births per 1,000 people

1x
Year Annual births per 1,000 people
Mongolia Tonga
2023 19 23.1
2022 19.5 23.4
2021 21.6 23.5
2020 23.4 23.6
2019 24.4 23.8
2018 24.5 24.1
2017 23.9 24.5
2016 25.9 25.2
2015 27.1 25.8
2014 28 26.4
2013 27.5 26.9
2012 26 27.3
2011 25.1 27.7
2010 23.1 28
2009 24.8 28.4
2008 23.9 28.7
2007 21.9 29
2006 20 29.5
2005 18.6 30
2004 18.4 30
2003 18.6 29.9
2002 19.4 29.5
2001 20.3 29.4
2000 20.8 29.4
1999 21.1 29.6
1998 21.4 29.7
1997 22.2 29.8
1996 23.3 30.6
1995 24 31.4
1994 24.5 32.2
1993 25.8 32.7
1992 28.8 33
1991 31.9 33.2
1990 34.1 33.3
1989 35.3 33.4
1988 36.4 33.5
1987 37.2 33.7
1986 37.7 34.4
1985 38.5 34.9
1984 38.7 35.4
1983 38.6 35.6
1982 38.5 35.8
1981 38.4 36
1980 38.4 36.1
1979 38.7 36.1
1978 38.9 36
1977 39 35.7
1976 39.1 35.6
1975 39.3 35.8
1974 39.5 36
1973 39.6 36.5
1972 39.8 37
1971 40 37.8
1970 40.4 38.8
1969 40.9 39.6
1968 41.6 40.3
1967 42.3 41
1966 43.1 41.4
1965 43.6 41.9
1964 44 42.4
1963 44.2 42.9
1962 44.1 43.4
1961 44.2 43.9
1960 44.1 44.3

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

GeoRank.org/birth-rate/mongolia/tonga | CC BY

The latest reported birth rate per 1,000 people in 2023 was 19 in Mongolia and 23.1 in Tonga, compared with 44.1 and 44.3, respectively, in 1960.

Birth rate data compared

Mongolia Tonga
Fertility rate 2.7 3.13
Fertility rate rank 67/196 54/196
Birth rate 19 23.1
Birth rate rank 81/196 58/196
Population change due to births and deaths +46,995 +1,744
Natural population change rank 99/196 137/196
Natural population change rate +1.35% +1.67%
Population growth +1.25% -0.4%
Population growth rank 86/197 183/197
Age at first childbirth 20.5 years 24.9 years
Average age at childbearing 29.3 years 29.9 years
Annual births per 1,000 women ages 15-19 19.1 25
Annual births per 1,000 women ages 20-29 133.8 144.7
Annual births per 1,000 women ages 30+ 32.1 40.5
Female of reproductive age (15-49), share of population 24.2% 25.6%
Any modern method of contraceptive prevalence among married women ages 15-49 45.2% 25.2%
Share of births attended by skilled health staff 99.3% 98.3%
Maternal mortality per live birth 0.04% 0.07%
Neonatal mortality rate (before reaching 28 days of age) 0.74% 0.43%
Infant mortality rate (before reaching 1 year of age) 1.14% 0.8%
Mortality rate before reaching 5 years of age 1.36% 0.99%
Life expectancy 72.5 years 73.4 years

Children 0-14 years as share of population

Mongolia
Factual

UN forecast
Tonga
Factual

UN forecast
1x
Year Young
Mongolia Tonga
2100 16.3% 17.5%
2099 16.4% 17.6%
2098 16.4% 17.7%
2097 16.5% 17.7%
2096 16.6% 17.9%
2095 16.7% 18%
2094 16.8% 18.1%
2093 16.9% 18.3%
2092 17% 18.4%
2091 17.2% 18.6%
2090 17.3% 18.8%
2089 17.4% 19%
2088 17.6% 19.3%
2087 17.7% 19.5%
2086 17.9% 19.7%
2085 18% 20%
2084 18.1% 20.2%
2083 18.2% 20.4%
2082 18.3% 20.7%
2081 18.4% 20.9%
2080 18.5% 21.1%
2079 18.6% 21.3%
2078 18.6% 21.5%
2077 18.7% 21.7%
2076 18.7% 21.9%
2075 18.7% 22%
2074 18.7% 22.2%
2073 18.8% 22.3%
2072 18.8% 22.4%
2071 18.9% 22.6%
2070 18.9% 22.7%
2069 19% 22.8%
2068 19.1% 23%
2067 19.3% 23.2%
2066 19.4% 23.4%
2065 19.6% 23.6%
2064 19.8% 23.8%
2063 20.1% 24.1%
2062 20.4% 24.4%
2061 20.7% 24.7%
2060 21% 25%
2059 21.3% 25.4%
2058 21.6% 25.8%
2057 21.9% 26.2%
2056 22.2% 26.6%
2055 22.5% 27%
2054 22.7% 27.4%
2053 23% 27.8%
2052 23.1% 28.2%
2051 23.3% 28.5%
2050 23.3% 28.9%
2049 23.4% 29.1%
2048 23.4% 29.4%
2047 23.3% 29.6%
2046 23.3% 29.7%
2045 23.2% 29.8%
2044 23.1% 29.9%
2043 23% 30%
2042 22.9% 30.1%
2041 22.8% 30.1%
2040 22.8% 30.2%
2039 22.9% 30.2%
2038 23% 30.3%
2037 23.3% 30.4%
2036 23.6% 30.6%
2035 24% 30.7%
2034 24.6% 30.9%
2033 25.2% 31.1%
2032 25.9% 31.4%
2031 26.8% 31.8%
2030 27.8% 32.3%
2029 28.8% 33%
2028 29.7% 33.6%
2027 30.5% 34.1%
2026 31.2% 34.6%
2025 31.9% 35.2%
2024 32.2% 35.4%
2023 32.6% 35.6%
2022 32.9% 35.6%
2021 32.9% 35.7%
2020 32.8% 35.8%
2019 32.3% 36%
2018 31.6% 36.2%
2017 30.9% 36.4%
2016 30.2% 36.5%
2015 29.5% 36.7%
2014 28.9% 36.9%
2013 28.5% 37.1%
2012 28.1% 37.2%
2011 28% 37.4%
2010 27.9% 37.6%
2009 27.9% 37.8%
2008 28.1% 38%
2007 28.5% 38.3%
2006 29.1% 38.3%
2005 29.9% 38.3%
2004 30.8% 38.2%
2003 31.8% 38.1%
2002 32.9% 38.1%
2001 34.1% 38.2%
2000 35.2% 38.3%
1999 36.2% 38.6%
1998 37% 38.9%
1997 37.8% 39.3%
1996 38.4% 39.7%
1995 39% 39.9%
1994 39.5% 40.1%
1993 40% 40.3%
1992 40.5% 40.5%
1991 41% 40.6%
1990 41.4% 40.8%
1989 41.7% 40.9%
1988 41.8% 41.2%
1987 42% 41.5%
1986 42.1% 41.7%
1985 42.3% 42%
1984 42.5% 42.4%
1983 42.7% 42.9%
1982 43% 43.4%
1981 43.3% 43.9%
1980 43.7% 44.3%
1979 44.1% 44.8%
1978 44.5% 45.3%
1977 44.8% 45.8%
1976 45.2% 46.1%
1975 45.4% 46.2%
1974 45.6% 46.2%
1973 45.8% 46.2%
1972 45.8% 46.3%
1971 45.8% 46.4%
1970 45.6% 46.4%
1969 45.4% 46.3%
1968 44.9% 46.2%
1967 44.2% 46%
1966 43.3% 45.9%
1965 42.4% 45.9%
1964 41.4% 45.9%
1963 40.4% 45.9%
1962 39.6% 45.8%
1961 38.8% 45.7%
1960 38.1% 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/mongolia/tonga | CC BY

Children aged 0-14 make up 32.2% of the population in Mongolia and 35.4% in Tonga in 2024, compared to 41.4% and 40.8% respectively in 1990.

Demographics of Mongolia and Tonga compared.

Fertility rates around the globe

1x

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

GeoRank.org/birth-rate/mongolia/tonga | CC BY

Maternal mortality chart: Mongolia vs Tonga

Mongolia
Tonga
1x
Year Maternal mortality per 100K births
Mongolia Tonga
2023 41 67
2022 41 72
2021 63 76
2020 47 74
2019 45 73
2018 45 74
2017 45 77
2016 48 78
2015 52 79
2014 56 80
2013 59 80
2012 63 83
2011 67 84
2010 71 85
2009 75 91
2008 77 88
2007 81 88
2006 90 89
2005 99 92
2004 108 92
2003 114 95
2002 120 98
2001 130 98
2000 144 100
1999 162 99
1998 174 104
1997 180 111
1996 178 113
1995 176 117
1994 178 123
1993 181 127
1992 199 129
1991 227 134
1990 276 138
1989 311 139
1988 335 145
1987 341 147
1986 346 149
1985 352 148

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

GeoRank.org/birth-rate/mongolia/tonga | CC BY

The maternal mortality rate, which is the probability of dying during childbirth or within 42 days of pregnancy termination, is 41 deaths per 100,000 live births in Mongolia, compared to 67 deaths in Tonga.

Under-five mortality rates

Mongolia
Tonga

Probability that a newborn baby will die before reaching age five

1x
Year Under 5 mortality rate
Mongolia Tonga
2023 1.36% 0.99%
2022 1.39% 1.02%
2021 1.43% 1.05%
2020 1.48% 1.08%
2019 1.56% 1.1%
2018 1.64% 1.12%
2017 1.74% 1.15%
2016 1.84% 1.17%
2015 1.94% 1.19%
2014 2.04% 1.22%
2013 2.15% 1.24%
2012 2.28% 1.26%
2011 2.44% 1.29%
2010 2.63% 1.31%
2009 2.85% 1.34%
2008 3.11% 1.37%
2007 3.39% 1.41%
2006 3.71% 1.44%
2005 4.07% 1.48%
2004 4.45% 1.52%
2003 4.87% 1.56%
2002 5.32% 1.61%
2001 5.8% 1.65%
2000 6.29% 1.7%
1999 6.78% 1.74%
1998 7.27% 1.78%
1997 7.74% 1.81%
1996 8.19% 1.85%
1995 8.6% 1.89%
1994 9% 1.94%
1993 9.39% 2%
1992 9.78% 2.06%
1991 10.2% 2.14%
1990 10.7% 2.21%
1989 11.1% 2.29%
1988 11.7% 2.37%
1987 12.2% 2.44%
1986 12.8% 2.51%
1985 13.4% 2.57%
1984 13.9% 2.63%
1983 14.4% 2.7%
1982 15% 2.78%
1981 15.5% 2.87%
1980 16.1% 2.97%
1979 16.7% 3.09%
1978 17.3% 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/mongolia/tonga | CC BY

The chance that a newborn baby will die before reaching age five is 1.36% in Mongolia 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. Central Intelligence Agency (CIA) (2025, retrieved 2026-02-20)

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