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Population in Guinea-Bissau compared to Sierra Leone: Trends, Charts, Rankings

Updated on by Georank

The latest officially reported population of Guinea-Bissau was 2,249,515 in 2025 vs 8,819,794 people in Sierra Leone in 2025. In 2026, based on the adjusted UN estimation, the current Guinea-Bissau's population is 2,323,460 people compared to 9,090,531 in Sierra Leone.

Population statistics:

  • Sierra Leone's population is 3.91 times bigger than Guinea-Bissau's.
  • Guinea-Bissau is ranked the 146th most populous country in the world, while Sierra Leone is the 100th.
  • The countries together account for 0.14% of the world: 0.03% for Guinea-Bissau vs 0.11% for Sierra Leone.
  • For the last 10 years, Guinea-Bissau has had an average growth rate of +2.36% per year vs +2.29% in Sierra Leone.
  • Since 2006, the population of Guinea-Bissau has increased from 1.42M people to 2.32M (64.2% growth), while Sierra Leone has grown from 5.62M to 9.09M (61.6% growth).

Guinea-Bissau vs Sierra Leone: population by year and forecast

Guinea-Bissau
Factual

Projection
Sierra Leone
Factual

Projection
1x
Year Population
Guinea-Bissau Sierra Leone
2100 4,713,104 16,107,087
2099 4,706,098 16,121,940
2098 4,699,568 16,135,035
2097 4,691,855 16,149,905
2096 4,682,938 16,160,672
2095 4,674,608 16,169,304
2094 4,663,103 16,168,902
2093 4,651,788 16,173,609
2092 4,639,582 16,170,778
2091 4,628,423 16,163,901
2090 4,616,772 16,154,165
2089 4,604,837 16,142,526
2088 4,592,099 16,128,775
2087 4,578,407 16,112,585
2086 4,562,793 16,085,549
2085 4,547,020 16,064,212
2084 4,530,206 16,040,563
2083 4,514,557 16,006,923
2082 4,498,172 15,970,872
2081 4,481,590 15,930,880
2080 4,461,992 15,892,665
2079 4,440,836 15,850,728
2078 4,419,277 15,801,450
2077 4,395,599 15,750,408
2076 4,371,019 15,695,310
2075 4,343,934 15,635,345
2074 4,318,519 15,580,279
2073 4,290,772 15,512,655
2072 4,262,846 15,442,481
2071 4,234,576 15,370,747
2070 4,206,253 15,293,426
2069 4,176,501 15,212,664
2068 4,145,457 15,124,069
2067 4,114,243 15,028,190
2066 4,082,951 14,931,295
2065 4,048,502 14,833,794
2064 4,013,784 14,736,872
2063 3,978,328 14,638,180
2062 3,941,631 14,525,736
2061 3,904,197 14,420,068
2060 3,868,146 14,307,451
2059 3,829,277 14,194,972
2058 3,789,609 14,077,124
2057 3,750,140 13,957,197
2056 3,710,996 13,832,494
2055 3,670,229 13,702,508
2054 3,627,303 13,576,231
2053 3,586,333 13,440,929
2052 3,543,640 13,299,910
2051 3,498,845 13,152,910
2050 3,453,155 13,006,688
2049 3,405,764 12,863,637
2048 3,358,731 12,712,671
2047 3,310,142 12,566,944
2046 3,263,507 12,411,042
2045 3,214,677 12,254,651
2044 3,167,400 12,088,895
2043 3,120,097 11,928,393
2042 3,072,862 11,767,372
2041 3,025,833 11,599,942
2040 2,978,159 11,428,331
2039 2,929,364 11,259,845
2038 2,881,007 11,097,180
2037 2,832,794 10,928,754
2036 2,783,401 10,757,928
2035 2,736,240 10,582,918
2034 2,688,290 10,411,088
2033 2,638,427 10,238,503
2032 2,588,961 10,059,929
2031 2,540,013 9,881,109
2030 2,491,987 9,705,485
2029 2,444,278 9,529,493
2028 2,396,253 9,358,412
2027 2,347,151 9,177,288
2026 2,298,439 8,998,902
2025 2,249,515 8,819,794
2024 2,201,352 8,642,022
2023 2,153,339 8,460,512
2022 2,105,529 8,276,807
2021 2,058,841 8,094,602
2020 2,013,255 7,912,558
2019 1,967,696 7,731,991
2018 1,922,168 7,554,563
2017 1,877,072 7,379,299
2016 1,831,893 7,205,328
2015 1,786,457 7,037,655
2014 1,741,122 6,876,385
2013 1,695,973 6,714,051
2012 1,651,417 6,551,080
2011 1,608,076 6,387,251
2010 1,566,347 6,222,714
2009 1,526,377 6,055,646
2008 1,488,054 5,894,722
2007 1,450,986 5,749,352
2006 1,415,303 5,624,466
2005 1,381,585 5,501,712
2004 1,349,563 5,355,717
2003 1,318,806 5,177,687
2002 1,289,307 4,971,435
2001 1,261,273 4,692,716
2000 1,234,741 4,423,611
1999 1,210,206 4,318,043
1998 1,187,473 4,295,785
1997 1,165,545 4,253,716
1996 1,143,535 4,199,210
1995 1,119,949 4,179,179
1994 1,092,031 4,173,105
1993 1,058,745 4,157,130
1992 1,024,356 4,166,366
1991 994,639 4,246,267
1990 973,669 4,196,828
1989 957,789 4,034,037
1988 942,061 3,934,517
1987 926,862 3,829,718
1986 912,126 3,728,380
1985 897,697 3,638,438
1984 883,519 3,558,758
1983 869,592 3,481,646
1982 855,891 3,408,183
1981 842,432 3,338,940
1980 829,303 3,272,089
1979 819,867 3,207,499
1978 791,694 3,145,517
1977 741,789 3,085,354
1976 694,191 3,028,820
1975 650,966 2,974,657
1974 613,338 2,920,459
1973 592,808 2,866,955
1972 586,620 2,814,388
1971 586,221 2,763,222
1970 584,403 2,712,286
1969 581,610 2,661,365
1968 578,170 2,611,532
1967 569,011 2,562,384
1966 566,908 2,514,638
1965 575,005 2,468,666
1964 588,543 2,424,390
1963 594,418 2,382,258
1962 589,474 2,342,242
1961 582,532 2,304,227
1960 577,633 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/guinea-bissau/sierra-leone | CC BY

From 2006 to 2016, the population of Guinea-Bissau increased by 416,590 people (a 29.4% growth), while Sierra Leone gained 1,580,862 people (a 28.1% growth).

For the next 10 years, from 2016 to 2026, Guinea-Bissau gained 491,567 people (a 26.8% growth), while Sierra Leone's population increased by 1,885,203 people (a 26.2% growth).

Guinea-Bissau was ranked 148th most populous country in 2006 and is 146th 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) Guinea-Bissau's population will grow by 48.6% to 3,453,155 people with a rank change from 146th to 136th. The population of Sierra Leone will increase by 43.1% to 13,006,688 people and rank change from 100th to 91st.

Guinea-Bissau is projected to reach its peak in 2100 at 4.71M people compared to the peak of 16.2M people in 2093 for Sierra Leone.

Population growth rate by year

Guinea-Bissau
Factual

Projection
Sierra Leone
Factual

Projection
1x
Year Growth rate
Guinea-Bissau Sierra Leone
2100 0.15% -0.09%
2099 0.14% -0.08%
2098 0.16% -0.09%
2097 0.19% -0.07%
2096 0.18% -0.05%
2095 0.25% 0.002%
2094 0.24% -0.03%
2093 0.26% 0.02%
2092 0.24% 0.04%
2091 0.25% 0.06%
2090 0.26% 0.07%
2089 0.28% 0.09%
2088 0.3% 0.1%
2087 0.34% 0.17%
2086 0.35% 0.13%
2085 0.37% 0.15%
2084 0.35% 0.21%
2083 0.36% 0.23%
2082 0.37% 0.25%
2081 0.44% 0.24%
2080 0.48% 0.26%
2079 0.49% 0.31%
2078 0.54% 0.32%
2077 0.56% 0.35%
2076 0.62% 0.38%
2075 0.59% 0.35%
2074 0.65% 0.44%
2073 0.66% 0.45%
2072 0.67% 0.47%
2071 0.67% 0.51%
2070 0.71% 0.53%
2069 0.75% 0.59%
2068 0.76% 0.64%
2067 0.77% 0.65%
2066 0.85% 0.66%
2065 0.86% 0.66%
2064 0.89% 0.67%
2063 0.93% 0.77%
2062 0.96% 0.73%
2061 0.93% 0.79%
2060 1.02% 0.79%
2059 1.05% 0.84%
2058 1.05% 0.86%
2057 1.05% 0.9%
2056 1.11% 0.95%
2055 1.18% 0.93%
2054 1.14% 1.01%
2053 1.2% 1.06%
2052 1.28% 1.12%
2051 1.32% 1.12%
2050 1.39% 1.11%
2049 1.4% 1.19%
2048 1.47% 1.16%
2047 1.43% 1.26%
2046 1.52% 1.28%
2045 1.49% 1.37%
2044 1.52% 1.35%
2043 1.54% 1.37%
2042 1.55% 1.44%
2041 1.6% 1.5%
2040 1.67% 1.5%
2039 1.68% 1.47%
2038 1.7% 1.54%
2037 1.77% 1.59%
2036 1.72% 1.65%
2035 1.78% 1.65%
2034 1.89% 1.69%
2033 1.91% 1.78%
2032 1.93% 1.81%
2031 1.93% 1.81%
2030 1.95% 1.85%
2029 2% 1.83%
2028 2.09% 1.97%
2027 2.12% 1.98%
2026 2.17% 2.03%
2025 2.19% 2.06%
2024 2.23% 2.15%
2023 2.27% 2.22%
2022 2.27% 2.25%
2021 2.26% 2.3%
2020 2.32% 2.34%
2019 2.37% 2.35%
2018 2.4% 2.38%
2017 2.47% 2.41%
2016 2.54% 2.38%
2015 2.6% 2.35%
2014 2.66% 2.42%
2013 2.7% 2.49%
2012 2.7% 2.56%
2011 2.66% 2.64%
2010 2.62% 2.76%
2009 2.58% 2.73%
2008 2.55% 2.53%
2007 2.52% 2.22%
2006 2.44% 2.23%
2005 2.37% 2.73%
2004 2.33% 3.44%
2003 2.29% 4.15%
2002 2.22% 5.94%
2001 2.15% 6.08%
2000 2.03% 2.44%
1999 1.91% 0.52%
1998 1.88% 0.99%
1997 1.92% 1.3%
1996 2.11% 0.48%
1995 2.56% 0.15%
1994 3.14% 0.38%
1993 3.36% -0.22%
1992 2.99% -1.88%
1991 2.15% 1.18%
1990 1.66% 4.04%
1989 1.67% 2.53%
1988 1.64% 2.74%
1987 1.62% 2.72%
1986 1.61% 2.47%
1985 1.6% 2.24%
1984 1.6% 2.21%
1983 1.6% 2.16%
1982 1.6% 2.07%
1981 1.58% 2.04%
1980 1.15% 2.01%
1979 3.56% 1.97%
1978 6.73% 1.95%
1977 6.86% 1.87%
1976 6.64% 1.82%
1975 6.13% 1.86%
1974 3.46% 1.87%
1973 1.05% 1.87%
1972 0.07% 1.85%
1971 0.31% 1.88%
1970 0.48% 1.91%
1969 0.59% 1.91%
1968 1.61% 1.92%
1967 0.37% 1.9%
1966 -1.41% 1.86%
1965 -2.3% 1.83%
1964 -0.99% 1.77%
1963 0.84% 1.71%
1962 1.19% 1.65%
1961 0.85% 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/guinea-bissau/sierra-leone | CC BY

In 2025, the population of Guinea-Bissau grew by 2.19%, while Sierra Leone's population grew by 2.06%.

Live population counters

Guinea-Bissau Sierra Leone
Current population
2323460
9090531
Population rank 146/197 100/197
Percent of world population 0.03% 0.11%
One net population change
10.9 minutes
2.96 minutes
One birth every
8.08 minutes
2.02 minutes
One death every
34.1 minutes
7.41 minutes
Daily growth/decline +132 +487
Annual growth/decline +48,163 +177,772
Annual growth/decline rate +2.19% +2.06%
Population growth rate rank 41/197 47/197
One migration net change every
6.4 hours
46.6 minutes
Annual migration change -1,373 -11,309
Net migration rank 96/196 136/196
Foreign-born residents 15,064 49,997
Foreign-born residents rank 172/195 151/195
Foreign-born share of population 0.7% 0.6%
Foreign-born share rank 165/195 174/195

Natural population change vs migration

Guinea-Bissau
Natural

Migration
Sierra Leone
Natural

Migration
1x
Year Population change
Guinea-Bissau Sierra Leone
Natural Migration Natural Migration
2025 - -1,373 - -11,309
2024 49,642 -1,712 189,234 -11,000
2023 49,498 -1,400 188,788 -4,000
2022 48,920 -1,400 186,625 -4,000
2021 47,242 -1,395 183,326 -1,544
2020 46,718 -1,394 181,015 1,292
2019 47,196 -1,395 181,068 -2,238
2018 46,659 -1,396 178,772 -2,741
2017 46,318 -1,398 173,259 1,234
2016 46,814 -1,392 168,784 4,657
2015 46,846 -1,393 162,275 -356
2014 46,615 -1,393 160,137 485
2013 46,472 -1,395 161,265 2,773
2012 45,480 -1,442 160,915 988
2011 44,405 -1,760 158,858 6,895
2010 43,067 -2,257 155,338 7,983
2009 41,950 -2,821 152,669 18,145
2008 40,841 -3,313 149,855 1,182
2007 40,288 -3,676 145,740 -6,042
2006 38,886 -4,142 144,127 -34,052
2005 37,347 -4,662 137,234 -1,805
2004 36,495 -5,144 132,661 23,897
2003 35,649 -5,487 130,312 69,185
2002 34,561 -5,712 126,429 86,578
2001 33,461 -6,239 116,647 227,791
2000 32,816 -6,971 110,754 83,013
1999 30,916 -7,686 102,295 -84,926
1998 30,390 -8,163 103,906 -76,766
1997 29,792 -8,176 105,433 -48,437
1996 29,778 -7,369 104,140 -52,110
1995 29,142 -4,376 100,885 -112,857
1994 27,895 3,174 101,486 -77,371
1993 26,943 8,562 103,317 -95,476
1992 25,747 7,531 103,251 -129,565
1991 24,527 1,621 105,477 -238,965
1990 23,936 -8,151 100,778 131,587
1989 24,286 -8,296 98,298 -5,079
1988 23,940 -8,473 96,344 9,470
1987 23,549 -8,622 94,235 9,558
1986 23,301 -8,748 90,902 7,992
1985 23,116 -8,812 88,869 -7,873
1984 22,861 -8,812 87,072 -8,708
1983 22,542 -8,729 84,628 -8,783
1982 22,131 -8,539 82,457 -11,379
1981 21,611 -8,291 80,111 -12,699
1980 21,024 -8,086 77,932 -11,641
1979 19,736 -13,801 75,992 -13,095
1978 17,468 32,936 74,130 -13,073
1977 15,484 33,922 71,663 -12,399
1976 13,688 32,113 69,506 -15,686
1975 11,998 28,645 67,560 -13,058
1974 10,321 24,290 65,357 -11,473
1973 8,430 -1,985 62,443 -9,322
1972 7,911 -1,985 60,279 -8,267
1971 8,183 -13,302 58,484 -8,162
1970 7,632 1,123 56,513 -4,957
1969 7,857 -11,033 54,768 -4,485
1968 7,289 2,769 53,126 -3,743
1967 6,742 1,516 51,734 -2,819
1966 6,955 -11,006 49,486 -2,911
1965 7,789 -19,928 47,223 -1,851
1964 8,989 -23,936 45,487 -2,308
1963 9,190 -5,993 43,569 -2,480
1962 10,662 -3,960 41,603 -2,658
1961 10,756 -3,575 40,022 -2,947
1960 10,618 -8,007 38,192 -3,528

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

GeoRank.org/population/guinea-bissau/sierra-leone | CC BY

Over the last 10 years, 97.1% of the population change in Guinea-Bissau is from natural causes (a gain of 475,853 people) and 2.91% is from migration (a loss of 14,275 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, 15,064 residents or 0.7% of the population were not native-born in Guinea-Bissau, compared to 49,997 people or 0.6% in Sierra Leone.

Biggest cities by population

Guinea-Bissau
City Population
Bissau 492K
Bafata 29.6K
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/guinea-bissau/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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