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350px|alt=|thumb|Guinea-Bissau's population between 1960 and 2017.
This is a demography of the population of Guinea-Bissau including population density, ethnicity, education level, health of the populace, economic status, religious affiliations and other aspects of the population.
Population
According to the 2025 revision of The World Factbook the total population was 2,132,325 in 2024. The proportion of children below the age of 14 in 2020 was 43.17%, 53.75% was between 15 and 65 years of age, while 3.08% was 65 years or older.
{| class="wikitable" style="text-align: right;"
|-
!
! width="80pt"|Total population
{| class="wikitable"
|-
! width="80pt"|Age group
! width="80pt"|Male
! width="80pt"|Female
! width="80pt"|Total
! width="80pt"|%
|-
| align="right" | Total
| align="right" | 790 873
| align="right" | 813 688
| align="right" | 1 604 561
| align="right" | 100
|-
| align="right" | 0–4
| align="right" | 137 507
| align="right" | 131 104
| align="right" | 268 611
| align="right" | 16.74
|-
| align="right" | 5–9
| align="right" | 125 195
| align="right" | 118 976
| align="right" | 244 171
| align="right" | 15.22
|-
| align="right" | 10–14
| align="right" | 91 543
| align="right" | 90 827
| align="right" | 182 370
| align="right" | 11.37
|-
| align="right" | 15–19
| align="right" | 85 443
| align="right" | 84 441
| align="right" | 169 884
| align="right" | 10.59
|-
| align="right" | 20–24
| align="right" | 72 130
| align="right" | 70 537
| align="right" | 142 667
| align="right" | 8.89
|-
| align="right" | 25–29
| align="right" | 67 422
| align="right" | 69 259
| align="right" | 136 681
| align="right" | 8.52
|-
| align="right" | 30–34
| align="right" | 54 779
| align="right" | 60 638
| align="right" | 115 417
| align="right" | 7.19
|-
| align="right" | 35–39
| align="right" | 46 871
| align="right" | 55 153
| align="right" | 102 024
| align="right" | 6.36
|-
| align="right" | 40–44
| align="right" | 30 186
| align="right" | 34 773
| align="right" | 64 959
| align="right" | 4.05
|-
| align="right" | 45–49
| align="right" | 25 238
| align="right" | 30 395
| align="right" | 55 633
| align="right" | 3.47
|-
| align="right" | 50–54
| align="right" | 17 056
| align="right" | 20 282
| align="right" | 37 338
| align="right" | 2.33
|-
| align="right" | 55–59
| align="right" | 15 067
| align="right" | 18 335
| align="right" | 33 402
| align="right" | 2.08
|-
| align="right" | 60–64
| align="right" | 9 076
| align="right" | 11 570
| align="right" | 20 646
| align="right" | 1.29
|-
| align="right" | 65–69
| align="right" | 6 482
| align="right" | 6 899
| align="right" | 13 381
| align="right" | 0.83
|-
| align="right" | 70–74
| align="right" | 3 823
| align="right" | 5 014
| align="right" | 8 837
| align="right" | 0.55
|-
| align="right" | 75–79
| align="right" | 1 806
| align="right" | 2 881
| align="right" | 4 687
| align="right" | 0.29
|-
| align="right" | 80+
| align="right" | 1 249
| align="right" | 2 604
| align="right" | 3 853
| align="right" | 0.24
|-
! width="50"|Age group
! width="80pt"|Male
! width="80"|Female
! width="80"|Total
! width="50"|Percent
|-
| align="right" | 0–14
| align="right" | 354 245
| align="right" | 340 907
| align="right" | 695 152
| align="right" | 43.32
|-
| align="right" | 15–64
| align="right" | 423 268
| align="right" | 455 383
| align="right" | 878 651
| align="right" | 54.76
|-
| align="right" | 65+
| align="right" | 13 360
| align="right" | 17 398
| align="right" | 30 758
| align="right" | 1.92
|-
|}
Vital statistics
Registration of vital events is in Guinea-Bissau not complete. The Population Departement of the United Nations prepared the following estimates.
|-
|1950–1955
|35.88
|-
|1955–1960
| 37.19
|-
|1960–1965
| 38.63
|-
|1965–1970
| 40.60
|-
|1970–1975
| 42.48
|-
|1975–1980
| 44.49
|-
|1980–1985
| 46.60
|-
|1985–1990
| 48.18
|-
|1990–1995
| 49.99
|-
|1995–2000
| 51.81
|-
|2000–2005
| 52.68
|-
|2005–2010
| 54.18
|-
|2010–2015
| 56.00
|}
Ethnic groups
thumb|The Major Ethnic Groups of Guinea-Bissau as of 2009. All red spots excluding in the northeast are cities.
- Fulani 28.5%
- Balanta 22.5%
- Mandinga 14.7%
- Papel 9.1%
- Manjaco 8.3%
- Beafada 3.5%
- Mancanha 3.1%
- Bijago 2.1%
- Felupe 1.7%
- Mansoanca 1.4%
- Balanta Mane 1%
- Other 1.8%
- None 2.2%