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Population in Benin compared to Sierra Leone: Trends, Charts, Rankings

Updated on by Georank

The latest officially reported population of Benin was 14,814,460 in 2025 vs 8,819,794 people in Sierra Leone in 2025. In 2026, based on the adjusted UN estimation, the current Benin's population is 15,358,725 people compared to 9,090,531 in Sierra Leone.

Population statistics:

  • Benin's population is 1.69 times bigger than Sierra Leone's.
  • Benin is ranked the 76th most populous country in the world, while Sierra Leone is the 100th.
  • The countries together account for 0.29% of the world: 0.18% for Benin vs 0.11% for Sierra Leone.
  • For the last 10 years, Benin has had an average growth rate of +2.72% per year vs +2.29% in Sierra Leone.
  • Since 2006, the population of Benin has increased from 8.69M people to 15.4M (76.7% growth), while Sierra Leone has grown from 5.62M to 9.09M (61.6% growth).

Benin vs Sierra Leone: population by year and forecast

Benin
Factual

Projection
Sierra Leone
Factual

Projection
1x
Year Population
Benin Sierra Leone
2100 39,983,872 16,107,087
2099 39,812,782 16,121,940
2098 39,635,737 16,135,035
2097 39,458,425 16,149,905
2096 39,267,189 16,160,672
2095 39,069,668 16,169,304
2094 38,861,643 16,168,902
2093 38,654,312 16,173,609
2092 38,438,555 16,170,778
2091 38,219,341 16,163,901
2090 37,994,758 16,154,165
2089 37,758,164 16,142,526
2088 37,514,605 16,128,775
2087 37,263,867 16,112,585
2086 37,010,840 16,085,549
2085 36,747,949 16,064,212
2084 36,482,666 16,040,563
2083 36,206,559 16,006,923
2082 35,919,464 15,970,872
2081 35,632,837 15,930,880
2080 35,340,781 15,892,665
2079 35,042,368 15,850,728
2078 34,737,536 15,801,450
2077 34,426,961 15,750,408
2076 34,112,205 15,695,310
2075 33,795,633 15,635,345
2074 33,465,867 15,580,279
2073 33,130,654 15,512,655
2072 32,785,976 15,442,481
2071 32,441,087 15,370,747
2070 32,088,089 15,293,426
2069 31,731,457 15,212,664
2068 31,377,153 15,124,069
2067 31,019,975 15,028,190
2066 30,659,408 14,931,295
2065 30,291,447 14,833,794
2064 29,919,749 14,736,872
2063 29,549,126 14,638,180
2062 29,175,986 14,525,736
2061 28,802,803 14,420,068
2060 28,426,146 14,307,451
2059 28,046,395 14,194,972
2058 27,667,117 14,077,124
2057 27,283,017 13,957,197
2056 26,900,755 13,832,494
2055 26,509,320 13,702,508
2054 26,115,455 13,576,231
2053 25,724,306 13,440,929
2052 25,327,058 13,299,910
2051 24,928,787 13,152,910
2050 24,529,464 13,006,688
2049 24,128,830 12,863,637
2048 23,727,047 12,712,671
2047 23,325,128 12,566,944
2046 22,919,519 12,411,042
2045 22,510,298 12,254,651
2044 22,107,673 12,088,895
2043 21,702,786 11,928,393
2042 21,296,676 11,767,372
2041 20,893,690 11,599,942
2040 20,492,059 11,428,331
2039 20,092,542 11,259,845
2038 19,693,130 11,097,180
2037 19,301,544 10,928,754
2036 18,910,879 10,757,928
2035 18,521,401 10,582,918
2034 18,136,190 10,411,088
2033 17,755,302 10,238,503
2032 17,378,392 10,059,929
2031 17,004,065 9,881,109
2030 16,635,301 9,705,485
2029 16,265,440 9,529,493
2028 15,899,231 9,358,412
2027 15,534,984 9,177,288
2026 15,172,565 8,998,902
2025 14,814,460 8,819,794
2024 14,462,724 8,642,022
2023 14,111,034 8,460,512
2022 13,759,501 8,276,807
2021 13,413,417 8,094,602
2020 13,070,169 7,912,558
2019 12,726,755 7,731,991
2018 12,383,347 7,554,563
2017 12,039,780 7,379,299
2016 11,697,842 7,205,328
2015 11,360,681 7,037,655
2014 11,030,004 6,876,385
2013 10,708,834 6,714,051
2012 10,397,657 6,551,080
2011 10,093,623 6,387,251
2010 9,797,484 6,222,714
2009 9,509,423 6,055,646
2008 9,228,466 5,894,722
2007 8,953,969 5,749,352
2006 8,693,242 5,624,466
2005 8,426,144 5,501,712
2004 8,159,094 5,355,717
2003 7,913,070 5,177,687
2002 7,675,426 4,971,435
2001 7,445,596 4,692,716
2000 7,221,619 4,423,611
1999 7,002,818 4,318,043
1998 6,789,489 4,295,785
1997 6,583,365 4,253,716
1996 6,391,858 4,199,210
1995 6,226,773 4,179,179
1994 6,096,506 4,173,105
1993 5,872,706 4,157,130
1992 5,617,844 4,166,366
1991 5,446,932 4,246,267
1990 5,281,479 4,196,828
1989 5,121,657 4,034,037
1988 4,967,341 3,934,517
1987 4,818,486 3,829,718
1986 4,675,420 3,728,380
1985 4,538,012 3,638,438
1984 4,405,895 3,558,758
1983 4,278,978 3,481,646
1982 4,156,596 3,408,183
1981 4,038,307 3,338,940
1980 3,925,251 3,272,089
1979 3,818,528 3,207,499
1978 3,718,305 3,145,517
1977 3,623,202 3,085,354
1976 3,532,196 3,028,820
1975 3,445,407 2,974,657
1974 3,362,633 2,920,459
1973 3,283,496 2,866,955
1972 3,207,543 2,814,388
1971 3,134,767 2,763,222
1970 3,065,057 2,712,286
1969 2,998,222 2,661,365
1968 2,934,257 2,611,532
1967 2,872,997 2,562,384
1966 2,814,317 2,514,638
1965 2,757,936 2,468,666
1964 2,704,003 2,424,390
1963 2,652,908 2,382,258
1962 2,604,659 2,342,242
1961 2,559,223 2,304,227
1960 2,517,286 2,268,356

Data sources: United Nations | World Population Prospects (2026–2100, retrieved 2026-07-08); World Bank | Health (1960–2025, retrieved 2026-07-08).

GeoRank.org/population/benin/sierra-leone | CC BY

From 2006 to 2016, the population of Benin increased by 3,004,600 people (a 34.6% growth), while Sierra Leone gained 1,580,862 people (a 28.1% growth).

For the next 10 years, from 2016 to 2026, Benin gained 3,660,883 people (a 31.3% growth), while Sierra Leone's population increased by 1,885,203 people (a 26.2% growth).

Benin was ranked 89th most populous country in 2006 and is 76th in 2026. Sierra Leone was ranked 105th in 2006 and ranked 100th now.

The UN's World Population Prospects forecasts that in 24 years (in 2050) Benin's population will grow by 59.7% to 24,529,464 people with a rank change from 76th to 68th. The population of Sierra Leone will increase by 43.1% to 13,006,688 people and rank change from 100th to 91st.

Benin is projected to reach its peak in 2100 at 40M people compared to the peak of 16.2M people in 2093 for Sierra Leone.

Population growth rate by year

Benin
Factual

Projection
Sierra Leone
Factual

Projection
1x
Year Growth rate
Benin Sierra Leone
2100 0.43% -0.09%
2099 0.45% -0.08%
2098 0.45% -0.09%
2097 0.49% -0.07%
2096 0.51% -0.05%
2095 0.54% 0.002%
2094 0.54% -0.03%
2093 0.56% 0.02%
2092 0.57% 0.04%
2091 0.59% 0.06%
2090 0.63% 0.07%
2089 0.65% 0.09%
2088 0.67% 0.1%
2087 0.68% 0.17%
2086 0.72% 0.13%
2085 0.73% 0.15%
2084 0.76% 0.21%
2083 0.8% 0.23%
2082 0.8% 0.25%
2081 0.83% 0.24%
2080 0.85% 0.26%
2079 0.88% 0.31%
2078 0.9% 0.32%
2077 0.92% 0.35%
2076 0.94% 0.38%
2075 0.99% 0.35%
2074 1.01% 0.44%
2073 1.05% 0.45%
2072 1.06% 0.47%
2071 1.1% 0.51%
2070 1.12% 0.53%
2069 1.13% 0.59%
2068 1.15% 0.64%
2067 1.18% 0.65%
2066 1.21% 0.66%
2065 1.24% 0.66%
2064 1.25% 0.67%
2063 1.28% 0.77%
2062 1.3% 0.73%
2061 1.33% 0.79%
2060 1.35% 0.79%
2059 1.37% 0.84%
2058 1.41% 0.86%
2057 1.42% 0.9%
2056 1.48% 0.95%
2055 1.51% 0.93%
2054 1.52% 1.01%
2053 1.57% 1.06%
2052 1.6% 1.12%
2051 1.63% 1.12%
2050 1.66% 1.11%
2049 1.69% 1.19%
2048 1.72% 1.16%
2047 1.77% 1.26%
2046 1.82% 1.28%
2045 1.82% 1.37%
2044 1.87% 1.35%
2043 1.91% 1.37%
2042 1.93% 1.44%
2041 1.96% 1.5%
2040 1.99% 1.5%
2039 2.03% 1.47%
2038 2.03% 1.54%
2037 2.07% 1.59%
2036 2.1% 1.65%
2035 2.12% 1.65%
2034 2.15% 1.69%
2033 2.17% 1.78%
2032 2.2% 1.81%
2031 2.22% 1.81%
2030 2.27% 1.85%
2029 2.3% 1.83%
2028 2.34% 1.97%
2027 2.39% 1.98%
2026 2.42% 2.03%
2025 2.43% 2.06%
2024 2.49% 2.15%
2023 2.55% 2.22%
2022 2.58% 2.25%
2021 2.63% 2.3%
2020 2.7% 2.34%
2019 2.77% 2.35%
2018 2.85% 2.38%
2017 2.92% 2.41%
2016 2.97% 2.38%
2015 3% 2.35%
2014 3% 2.42%
2013 2.99% 2.49%
2012 3.01% 2.56%
2011 3.02% 2.64%
2010 3.03% 2.76%
2009 3.04% 2.73%
2008 3.07% 2.53%
2007 3% 2.22%
2006 3.17% 2.23%
2005 3.27% 2.73%
2004 3.11% 3.44%
2003 3.1% 4.15%
2002 3.09% 5.94%
2001 3.1% 6.08%
2000 3.12% 2.44%
1999 3.14% 0.52%
1998 3.13% 0.99%
1997 3% 1.3%
1996 2.65% 0.48%
1995 2.14% 0.15%
1994 3.81% 0.38%
1993 4.54% -0.22%
1992 3.14% -1.88%
1991 3.13% 1.18%
1990 3.12% 4.04%
1989 3.11% 2.53%
1988 3.09% 2.74%
1987 3.06% 2.72%
1986 3.03% 2.47%
1985 3% 2.24%
1984 2.97% 2.21%
1983 2.94% 2.16%
1982 2.93% 2.07%
1981 2.88% 2.04%
1980 2.79% 2.01%
1979 2.7% 1.97%
1978 2.62% 1.95%
1977 2.58% 1.87%
1976 2.52% 1.82%
1975 2.46% 1.86%
1974 2.41% 1.87%
1973 2.37% 1.87%
1972 2.32% 1.85%
1971 2.27% 1.88%
1970 2.23% 1.91%
1969 2.18% 1.91%
1968 2.13% 1.92%
1967 2.09% 1.9%
1966 2.04% 1.86%
1965 1.99% 1.83%
1964 1.93% 1.77%
1963 1.85% 1.71%
1962 1.78% 1.65%
1961 1.67% 1.58%

Data sources: United Nations | World Population Prospects (2026–2100, retrieved 2026-07-08); World Bank | Health (1961–2025, retrieved 2026-07-08).

GeoRank.org/population/benin/sierra-leone | CC BY

In 2025, the population of Benin grew by 2.43%, while Sierra Leone's population grew by 2.06%.

Live population counters

Benin Sierra Leone
Current population
15358725
9090531
Population rank 76/197 100/197
Percent of world population 0.18% 0.11%
One net population change
1.5 minutes
2.96 minutes
One birth every
1.09 minutes
2.02 minutes
One death every
4.17 minutes
7.41 minutes
Daily growth/decline +964 +487
Annual growth/decline +351,736 +177,772
Annual growth/decline rate +2.43% +2.06%
Population growth rate rank 27/197 47/197
One migration net change every
1.12 hours
46.6 minutes
Annual migration change -7,847 -11,309
Net migration rank 127/196 136/196
Foreign-born residents 418,202 49,997
Foreign-born residents rank 88/195 151/195
Foreign-born share of population 2.9% 0.6%
Foreign-born share rank 118/195 174/195

Natural population change vs migration

Benin
Natural

Migration
Sierra Leone
Natural

Migration
1x
Year Population change
Benin Sierra Leone
Natural Migration Natural Migration
2025 - -7,847 - -11,309
2024 357,359 -7,725 189,234 -11,000
2023 353,933 -192 188,788 -4,000
2022 349,518 -192 186,625 -4,000
2021 341,103 1,729 183,326 -1,544
2020 341,929 1,729 181,015 1,292
2019 339,817 3,366 181,068 -2,238
2018 340,270 3,372 178,772 -2,741
2017 339,763 3,716 173,259 1,234
2016 336,559 3,837 168,784 4,657
2015 330,573 3,369 162,275 -356
2014 323,753 3,667 160,137 485
2013 315,804 -887 161,265 2,773
2012 306,180 1,260 160,915 988
2011 296,348 4,283 158,858 6,895
2010 287,703 3,947 155,338 7,983
2009 280,204 4,279 152,669 18,145
2008 274,242 3,198 149,855 1,182
2007 271,305 241 145,740 -6,042
2006 265,040 -15,135 144,127 -34,052
2005 253,795 30,495 137,234 -1,805
2004 245,630 4,173 132,661 23,897
2003 237,962 4,283 130,312 69,185
2002 229,472 3,572 126,429 86,578
2001 222,877 3,732 116,647 227,791
2000 218,013 3,335 110,754 83,013
1999 213,074 3,177 102,295 -84,926
1998 208,342 2,051 103,906 -76,766
1997 203,182 -1,322 105,433 -48,437
1996 197,643 -16,490 104,140 -52,110
1995 194,481 -45,469 100,885 -112,857
1994 196,637 -85,128 101,486 -77,371
1993 179,858 156,223 103,317 -95,476
1992 173,794 -138 103,251 -129,565
1991 168,174 0 105,477 -238,965
1990 163,055 -333 100,778 131,587
1989 157,235 -315 98,298 -5,079
1988 153,580 -1,867 96,344 9,470
1987 147,783 -1,792 94,235 9,558
1986 142,039 -1,899 90,902 7,992
1985 136,621 -1,953 88,869 -7,873
1984 131,590 -2,018 87,072 -8,708
1983 126,349 -2,090 84,628 -8,783
1982 122,748 -2,253 82,457 -11,379
1981 118,634 -2,543 80,111 -12,699
1980 112,969 -2,946 77,932 -11,641
1979 106,782 -3,365 75,992 -13,095
1978 100,762 -3,731 74,130 -13,073
1977 97,200 -4,022 71,663 -12,399
1976 93,141 -4,308 69,506 -15,686
1975 89,350 -4,607 67,560 -13,058
1974 85,623 -4,814 65,357 -11,473
1973 82,422 -4,960 62,443 -9,322
1972 79,415 -4,970 60,279 -8,267
1971 76,034 -4,921 58,484 -8,162
1970 73,156 -4,851 56,513 -4,957
1969 70,155 -4,792 54,768 -4,485
1968 67,327 -4,756 53,126 -3,743
1967 64,709 -4,756 51,734 -2,819
1966 62,169 -4,764 49,486 -2,911
1965 60,154 -4,793 47,223 -1,851
1964 57,352 -4,839 45,487 -2,308
1963 54,514 -4,847 43,569 -2,480
1962 51,664 -4,844 41,603 -2,658
1961 48,838 -4,791 40,022 -2,947
1960 44,564 -4,722 38,192 -3,528

Data sources: World Bank | Health (1960–2025, retrieved 2026-07-08).

GeoRank.org/population/benin/sierra-leone | CC BY

Over the last 10 years, 99.6% of the population change in Benin is from natural causes (a gain of 3,430,824 people) and 0.38% is from migration (a gain of 13,009 people). In Sierra Leone 99% is from natural causes (a gain of 1,793,146 people) and 1.03% is from migration (a loss of 18,696 people).

As of 2024, 418,202 residents or 2.9% of the population were not native-born in Benin, compared to 49,997 people or 0.6% in Sierra Leone.

Biggest cities by population

Benin
City Population
Cotonou 780K
Porto-Novo 234K
Abomey 90.2K
Save 31.4K
Sierra Leone
City Population
Freetown 951K
Bo 234K
Kenema 188K

Compare countries by 7 more topics

Population map with other countries

1x

Data sources: World Bank | Health (1960–2025, retrieved 2026-07-08); United Nations | World Population Prospects (1960–2026, retrieved 2026-07-08); U.S. Census Bureau (1960–2025, retrieved 2026-07-08); Central Intelligence Agency (CIA) (2000–2019, retrieved 2026-07-08).

GeoRank.org/population/benin/sierra-leone | CC BY

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Data sources:

  1. World Bank | Health (1960–2025, retrieved 2026-07-08)
  2. United Nations | World Population Prospects (1960–2100, retrieved 2026-07-08)
  3. U.S. Census Bureau (1960–2025, retrieved 2026-07-08)
  4. Central Intelligence Agency (CIA) (2000–2019, retrieved 2026-07-08)
  5. Wikidata (2026, retrieved 2026-07-08)

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