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Fertility & birth rates in Solomon Islands and Tanzania

Updated on by Georank team

The Solomon Islands has an annual birth rate of 26.9 births per 1,000 people, compared to 35.2 for Tanzania. The average number of children a woman is expected to have during her lifetime — the fertility rate, is 3.56 in the Solomon Islands and 4.61 in Tanzania — 29.5% difference.

1960 vs 2023, the fertility rate has decreased by 49.7% in the Solomon Islands and by 29.5% in Tanzania — in 1960, it was 7.07 and 6.54, respectively.

  • The Solomon Islands is ranked 45/196 by birth rate compared to 10/196 for Tanzania.
  • The mean age for first-time mothers is 22.6 years in the Solomon Islands, compared to 19.9 years in Tanzania.
  • The mean age at childbearing (for all the births, not just the first) is 29.1 in the Solomon Islands — it's 28.9 in Tanzania.
  • Annual births per 1,000 women ages 15-19 (adolescent birth rate or teenage mother rate) is 50.4 in the Solomon Islands vs 113.2 in Tanzania.
  • In the Solomon Islands, 24.8% of the population is composed of women of reproductive age (15-49), compared to 24.2% in Tanzania.

Fertility rate in Solomon Islands vs Tanzania by year

Solomon Islands
Tanzania
1x
Year Fertility rate
Solomon Islands Tanzania
2023 3.56 4.61
2022 3.62 4.67
2021 3.69 4.73
2020 3.75 4.8
2019 3.8 4.87
2018 3.93 4.93
2017 4.06 4.99
2016 4.2 5.01
2015 4.29 5.03
2014 4.36 5.12
2013 4.33 5.16
2012 4.33 5.14
2011 4.34 5.14
2010 4.34 5.23
2009 4.35 5.26
2008 4.36 5.32
2007 4.37 5.4
2006 4.39 5.51
2005 4.41 5.58
2004 4.47 5.6
2003 4.54 5.58
2002 4.6 5.57
2001 4.67 5.62
2000 4.76 5.67
1999 4.86 5.75
1998 4.98 5.81
1997 5.09 5.84
1996 5.22 5.83
1995 5.34 5.82
1994 5.4 5.89
1993 5.45 6
1992 5.51 6.08
1991 5.62 6.14
1990 5.74 6.2
1989 5.87 6.3
1988 5.99 6.38
1987 6.12 6.41
1986 6.26 6.49
1985 6.38 6.6
1984 6.49 6.72
1983 6.57 6.81
1982 6.64 6.87
1981 6.71 6.93
1980 6.77 6.99
1979 6.82 7.04
1978 6.87 7.06
1977 6.92 7.07
1976 6.95 7.09
1975 6.99 7.1
1974 7.01 7.12
1973 7 7.06
1972 6.99 7.05
1971 6.99 7.04
1970 6.98 7
1969 6.97 6.95
1968 6.95 6.9
1967 6.97 6.86
1966 7 6.8
1965 7.02 6.73
1964 7.05 6.68
1963 7.03 6.65
1962 7.04 6.61
1961 7.05 6.56
1960 7.07 6.54

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

GeoRank.org/birth-rate/solomon-islands/tanzania | CC BY

According to the latest available data on birth rates, the fertility rate in the Solomon Islands was 3.56 children per woman in 2023, compared to 4.61 in Tanzania in 2023. The replacement level is considered to be 2.1 children per woman.

Check the Solomon Islands vs Tanzania population clock for a dynamic visualization of the changing population.

Natural population change by year

Solomon Islands
Tanzania
1x
Year Natural population change
Solomon Islands Tanzania
2023 17,436 1,960,623
2022 17,253 1,927,960
2021 16,626 1,880,137
2020 16,488 1,861,377
2019 16,649 1,816,669
2018 16,790 1,777,852
2017 16,897 1,726,909
2016 17,027 1,659,502
2015 16,909 1,592,882
2014 16,652 1,565,630
2013 16,038 1,509,008
2012 15,585 1,439,325
2011 15,095 1,384,886
2010 14,604 1,363,477
2009 14,381 1,332,015
2008 14,225 1,303,728
2007 13,963 1,278,285
2006 13,799 1,257,927
2005 13,568 1,224,165
2004 13,444 1,175,379
2003 13,344 1,118,435
2002 13,195 1,063,195
2001 13,061 1,026,242
2000 12,938 985,185
1999 12,809 948,659
1998 12,658 920,806
1997 12,478 882,544
1996 12,328 868,524
1995 12,124 838,980
1994 11,771 803,953
1993 11,396 778,044
1992 11,029 767,961
1991 10,789 762,011
1990 10,561 750,825
1989 10,354 743,854
1988 10,142 736,551
1987 9,943 718,580
1986 9,656 705,677
1985 9,534 697,867
1984 9,299 687,435
1983 9,011 679,720
1982 8,720 662,627
1981 8,436 645,496
1980 8,156 629,444
1979 7,874 613,388
1978 7,598 595,024
1977 7,290 574,938
1976 7,058 553,617
1975 6,635 533,906
1974 6,612 515,152
1973 6,343 488,429
1972 6,074 467,305
1971 5,814 449,014
1970 5,575 427,988
1969 5,444 408,322
1968 5,285 389,467
1967 5,151 374,763
1966 5,028 360,229
1965 4,885 343,456
1964 4,747 328,527
1963 4,571 314,644
1962 4,408 300,663
1961 4,257 286,839
1960 4,119 275,814

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

GeoRank.org/birth-rate/solomon-islands/tanzania | 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 +2.18% in the Solomon Islands and +2.94% in Tanzania.

For the past 10 years, the annual natural population change has been +2.38% in the Solomon Islands and +3.05% in Tanzania.

Birth rate in Solomon Islands vs Tanzania by year

Solomon Islands
Tanzania

Annual births per 1,000 people

1x
Year Annual births per 1,000 people
Solomon Islands Tanzania
2023 26.9 35.2
2022 27.3 35.6
2021 27.7 36
2020 28 36.4
2019 28.4 36.9
2018 29.1 37.3
2017 30.1 37.6
2016 31.1 37.6
2015 31.9 37.6
2014 32.6 38.4
2013 32.5 38.4
2012 32.7 38.1
2011 33 38.1
2010 33.2 38.8
2009 33.7 39.2
2008 33.8 39.6
2007 33.9 40.2
2006 34 41
2005 34 41.5
2004 34.3 41.5
2003 34.6 41.3
2002 34.8 41.2
2001 35.1 41.4
2000 35.4 41.5
1999 35.8 41.8
1998 36.3 42.1
1997 36.7 42.1
1996 37.3 42.3
1995 37.7 41.9
1994 37.7 41.5
1993 37.6 41.7
1992 37.5 42.3
1991 37.9 42.7
1990 38.3 43
1989 38.7 43.5
1988 39.2 44
1987 39.7 44.3
1986 40.3 44.9
1985 40.6 45.7
1984 41 46.4
1983 41.2 47.1
1982 41.4 47.5
1981 41.7 47.9
1980 41.9 48.3
1979 42.2 48.8
1978 42.6 49.2
1977 42.9 49.5
1976 43.3 49.8
1975 43.8 50.2
1974 44.1 50.6
1973 44.1 50.3
1972 44.1 50.4
1971 44.2 50.6
1970 44.2 50.4
1969 44.6 50.3
1968 44.9 50.2
1967 45.4 50.3
1966 45.8 50.2
1965 46.1 49.9
1964 46.5 49.8
1963 46.5 49.7
1962 46.5 49.4
1961 46.7 49.1
1960 46.8 49

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

GeoRank.org/birth-rate/solomon-islands/tanzania | CC BY

The latest reported birth rate per 1,000 people in 2023 was 26.9 in the Solomon Islands and 35.2 in Tanzania, compared with 46.8 and 49, respectively, in 1960.

Birth rate data compared

Solomon Islands Tanzania
Fertility rate 3.56 4.61
Fertility rate rank 44/196 12/196
Birth rate 26.9 35.2
Birth rate rank 45/196 10/196
Population change due to births and deaths +17,436 +1,960,623
Natural population change rank 112/196 8/196
Natural population change rate +2.18% +2.94%
Population growth +2.4% +2.92%
Population growth rank 33/197 18/197
Age at first childbirth 22.6 years 19.9 years
Average age at childbearing 29.1 years 28.9 years
Annual births per 1,000 women ages 15-19 48.1 111.5
Annual births per 1,000 women ages 20-29 173 199.8
Annual births per 1,000 women ages 30+ 51.9 71.3
Female of reproductive age (15-49), share of population 24.8% 24.2%
Any modern method of contraceptive prevalence among married women ages 15-49 24.3% 31.1%
Share of births attended by skilled health staff 86.2% 63.5%
Maternal mortality per live birth 0.12% 0.28%
Neonatal mortality rate (before reaching 28 days of age) 0.83% 2.06%
Infant mortality rate (before reaching 1 year of age) 1.65% 2.99%
Mortality rate before reaching 5 years of age 2.06% 3.89%
Life expectancy 71 years 67.6 years

Children 0-14 years as share of population

Solomon Islands
Factual

UN forecast
Tanzania
Factual

UN forecast
1x
Year Young
Solomon Islands Tanzania
2100 19% 23.4%
2099 19.1% 23.6%
2098 19.2% 23.8%
2097 19.4% 23.9%
2096 19.5% 24.1%
2095 19.6% 24.3%
2094 19.8% 24.5%
2093 19.9% 24.7%
2092 20% 24.8%
2091 20.2% 25%
2090 20.3% 25.2%
2089 20.5% 25.4%
2088 20.6% 25.6%
2087 20.8% 25.8%
2086 21% 26%
2085 21.2% 26.2%
2084 21.3% 26.4%
2083 21.5% 26.6%
2082 21.7% 26.8%
2081 21.9% 27.1%
2080 22.1% 27.3%
2079 22.3% 27.5%
2078 22.4% 27.7%
2077 22.6% 28%
2076 22.8% 28.2%
2075 23% 28.4%
2074 23.2% 28.7%
2073 23.4% 28.9%
2072 23.6% 29.1%
2071 23.8% 29.4%
2070 24% 29.6%
2069 24.2% 29.8%
2068 24.4% 30.1%
2067 24.6% 30.3%
2066 24.8% 30.6%
2065 25% 30.8%
2064 25.2% 31.1%
2063 25.4% 31.3%
2062 25.6% 31.6%
2061 25.9% 31.9%
2060 26.1% 32.1%
2059 26.3% 32.4%
2058 26.6% 32.7%
2057 26.8% 32.9%
2056 27.1% 33.2%
2055 27.4% 33.5%
2054 27.7% 33.8%
2053 28% 34.1%
2052 28.3% 34.3%
2051 28.6% 34.6%
2050 28.9% 34.9%
2049 29.2% 35.2%
2048 29.4% 35.5%
2047 29.7% 35.8%
2046 30% 36.1%
2045 30.3% 36.4%
2044 30.6% 36.7%
2043 30.8% 37%
2042 31.1% 37.3%
2041 31.3% 37.6%
2040 31.6% 37.9%
2039 31.8% 38.3%
2038 32.1% 38.6%
2037 32.3% 39%
2036 32.5% 39.3%
2035 32.8% 39.6%
2034 33% 40%
2033 33.4% 40.3%
2032 33.7% 40.7%
2031 34.1% 41%
2030 34.5% 41.3%
2029 35% 41.6%
2028 35.4% 41.8%
2027 35.9% 42.1%
2026 36.3% 42.2%
2025 36.8% 42.4%
2024 37% 42.5%
2023 37.4% 42.7%
2022 37.7% 42.9%
2021 38.1% 43.1%
2020 38.4% 43.4%
2019 38.7% 43.6%
2018 39% 43.8%
2017 39.4% 44%
2016 39.7% 44.2%
2015 40% 44.5%
2014 40.2% 44.8%
2013 40.4% 44.9%
2012 40.7% 45.1%
2011 40.8% 45.2%
2010 41% 45.3%
2009 41.1% 45.3%
2008 41.2% 45.1%
2007 41.2% 45%
2006 41.3% 44.9%
2005 41.5% 44.8%
2004 41.7% 44.7%
2003 41.9% 44.6%
2002 42.2% 44.6%
2001 42.5% 44.5%
2000 42.9% 44.6%
1999 43.2% 44.7%
1998 43.5% 44.7%
1997 43.8% 44.8%
1996 44% 44.7%
1995 44.3% 44.5%
1994 44.5% 44.9%
1993 44.8% 45.5%
1992 45.1% 46%
1991 45.4% 46.2%
1990 45.8% 46.3%
1989 46.2% 46.5%
1988 46.6% 46.7%
1987 46.9% 46.9%
1986 47.3% 47.2%
1985 47.5% 47.4%
1984 47.8% 47.5%
1983 47.9% 47.6%
1982 48.1% 47.5%
1981 48.2% 47.4%
1980 48.3% 47.2%
1979 48.3% 46.9%
1978 48.3% 46.7%
1977 48.3% 46.6%
1976 48.2% 46.5%
1975 47.9% 46.4%
1974 47.5% 46.3%
1973 47.1% 46.2%
1972 46.9% 46.1%
1971 46.8% 46.1%
1970 46.7% 46%
1969 46.6% 45.9%
1968 46.4% 45.8%
1967 46.2% 45.6%
1966 46% 45.4%
1965 45.9% 45.2%
1964 45.8% 45%
1963 45.9% 44.8%
1962 46% 44.8%
1961 46.1% 44.8%
1960 46.3% 44.9%

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/solomon-islands/tanzania | CC BY

Children aged 0-14 make up 37% of the population in the Solomon Islands and 42.5% in Tanzania in 2024, compared to 45.8% and 46.3% respectively in 1990.

Demographics of the Solomon Islands and Tanzania compared.

Fertility rates around the globe

1x

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

GeoRank.org/birth-rate/solomon-islands/tanzania | CC BY

Maternal mortality chart: Solomon Islands vs Tanzania

Solomon Islands
Tanzania
1x
Year Maternal mortality per 100K births
Solomon Islands Tanzania
2023 123 276
2022 126 152
2021 153 162
2020 131 160
2019 135 292
2018 136 319
2017 140 345
2016 143 396
2015 146 433
2014 147 454
2013 147 479
2012 146 448
2011 147 475
2010 148 486
2009 152 502
2008 153 511
2007 163 453
2006 159 366
2005 161 350
2004 164 365
2003 167 397
2002 168 454
2001 167 493
2000 166 568
1999 164 635
1998 165 739
1997 164 777
1996 166 775
1995 168 797
1994 170 816
1993 173 851
1992 174 864
1991 178 873
1990 184 900
1989 188 927
1988 193 949
1987 200 964
1986 226 971
1985 209 980

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

GeoRank.org/birth-rate/solomon-islands/tanzania | CC BY

The maternal mortality rate, which is the probability of dying during childbirth or within 42 days of pregnancy termination, is 123 deaths per 100,000 live births in the Solomon Islands, compared to 276 deaths in Tanzania.

Under-five mortality rates

Solomon Islands
Tanzania

Probability that a newborn baby will die before reaching age five

1x
Year Under 5 mortality rate
Solomon Islands Tanzania
2023 2.06% 3.89%
2022 2.12% 4.05%
2021 2.18% 4.22%
2020 2.24% 4.42%
2019 2.3% 4.6%
2018 2.36% 4.8%
2017 2.41% 5.02%
2016 2.45% 5.25%
2015 2.49% 5.48%
2014 2.53% 5.67%
2013 2.58% 5.95%
2012 2.62% 6.21%
2011 2.67% 6.5%
2010 2.72% 6.86%
2009 2.76% 7.24%
2008 2.81% 7.7%
2007 2.85% 8.16%
2006 2.88% 8.69%
2005 2.91% 9.24%
2004 2.94% 9.86%
2003 2.97% 10.5%
2002 2.99% 11.3%
2001 3.03% 12.1%
2000 3.07% 12.8%
1999 3.11% 13.6%
1998 3.16% 14.2%
1997 3.21% 14.8%
1996 3.27% 15.2%
1995 3.35% 15.6%
1994 3.43% 15.9%
1993 3.52% 16.1%
1992 3.62% 16.3%
1991 3.72% 16.5%
1990 3.82% 16.7%
1989 3.93% 16.9%
1988 4.04% 17.2%
1987 4.16% 17.4%
1986 4.28% 17.6%
1985 4.42% 17.7%
1984 4.58% 17.8%
1983 4.74% 17.8%
1982 4.93% 17.8%
1981 5.14% 17.8%
1980 5.38% 17.9%
1979 5.64% 18.1%
1978 5.95% 18.4%
1977 6.29% 18.8%
1976 6.68% 19.2%
1975 7.9% 19.6%
1974 7.6% 20.1%
1973 8.12% 20.5%
1972 8.69% 20.9%
1971 9.29% 21.2%
1970 9.94% 21.6%
1969 10.6% 21.9%
1968 11.3% 22.2%
1967 12% 22.5%
1966 12.7% 22.8%
1965 13.3% 23.1%
1964 14% 23.4%
1963 14.7% 23.6%
1962 15.4% 23.8%
1961 16% 24%
1960 16.7% 24.2%

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

GeoRank.org/birth-rate/solomon-islands/tanzania | CC BY

The chance that a newborn baby will die before reaching age five is 2.06% in the Solomon Islands and 3.89% in Tanzania. 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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