Portugal has 18 districts and 2 autonomous regions (Azores and Madeira). Population figures are from the 2021 census.
By population
right|Map of Districts of Portugal
{| class="wikitable sortable"
|-
! Rank
! District
! Population
! %
! Population <br />Density
|-
| align=right | 1
| Lisbon (1)
| align=right | 2,275,385
| align=right | 22.0%
| align=right | 824.1
|-
| align=right | 2
| Porto (16)
| align=right | 1,785,405
| align=right | 17.3%
| align=right | 745.5
|-
| align=right | 3
| Setúbal (4)
| align=right | 874,806
| align=right | 8.5%
| align=right | 172.8
|-
| align=right | 4
| Braga (17)
| align=right | 846,293
| align=right | 8.2%
| align=right | 316.6
|-
| align=right | 5
| Aveiro (12)
| align=right | 700,787
| align=right | 6.8%
| align=right | 249.6
|-
| align=right | 6
| Faro (6)
| align=right | 467,343
| align=right | 4.5%
| align=right | 94.2
|-
| align=right | 7
| Leiria (2)
| align=right | 458,605
| align=right | 4.4%
| align=right | 130.5
|-
| align=right | 8
| Santarém (3)
| align=right | 424,973
| align=right | 4.1%
| align=right | 63.0
|-
| align=right | 9
| Coimbra (11)
| align=right | 408,551
| align=right | 3.9%
| align=right | 103.5
|-
| align=right | 10
| Viseu (13)
| align=right | 351,292
| align=right | 3.4%
| align=right | 70.2
|-
| align=right | 11
| Madeira
| align=right | 250,744
| align=right | 2.4%
| align=right | 314.6
|-
| align=right | 12
| Azores
| align=right | 236,413
| align=right | 2.3%
| align=right | 101.3
|-
| align=right | 13
| Viana do Castelo (18)
| align=right | 231,266
| align=right | 2.2%
| align=right | 102.6
|-
| align=right | 14
| Vila Real (15)
| align=right | 185,695
| align=right | 1.8%
| align=right | 42.9
|-
| align=right | 15
| Castelo Branco (9)
| align=right | 177,962
| align=right | 1.7%
| align=right | 26.7
|-
| align=right | 16
| Évora (7)
| align=right | 152,444
| align=right | 1.5%
| align=right | 20.6
|-
| align=right | 17
| Beja (5)
| align=right | 144,401
| align=right | 1.4%
| align=right | 14.1
|-
| align=right | 18
| Guarda (10)
| align=right | 142,974
| align=right | 1.4%
| align=right | 25.9
|-
| align=right | 19
| Bragança (14)
| align=right | 122,804
| align=right | 1.2%
| align=right | 18.6
|-
| align=right | 20
| Portalegre (8)
| align=right | 104,923
| align=right | 1.0%
| align=right | 17.3
|-
|
| | Portugal
| align=right | 10,343,066
| align=right | 100%
| align=right | 112.3
|}
By area
{| class="wikitable sortable"
|-
! Rank
! District
! Area (km²)
! %
! Population <br />Density
|-
| align=right | 1
| Beja (5)
| align=right | 10,255
| align=right | 11.1%
| align=right | 14.1
|-
| align=right | 2
| Évora (7)
| align=right | 7,393
| align=right | 8.0%
| align=right | 20.6
|-
| align=right | 3
| Santarém (3)
| align=right | 6,747
| align=right | 7.3%
| align=right | 63.0
|-
| align=right | 4
| Castelo Branco (9)
| align=right | 6,675
| align=right | 7.2%
| align=right | 26.7
|-
| align=right | 5
| Bragança (14)
| align=right | 6,608
| align=right | 7.2%
| align=right | 18.6
|-
| align=right | 6
| Portalegre (8)
| align=right | 6,065
| align=right | 6.6%
| align=right | 17.3
|-
| align=right | 7
| Guarda (10)
| align=right | 5,518
| align=right | 6.0%
| align=right | 25.9
|-
| align=right | 8
| Setúbal (4)
| align=right | 5,064
| align=right | 5.5%
| align=right | 172.8
|-
| align=right | 9
| Viseu (13)
| align=right | 5,007
| align=right | 5.4%
| align=right | 70.2
|-
| align=right | 10
| Faro (6)
| align=right | 4,960
| align=right | 5.4%
| align=right | 94.2
|-
| align=right | 11
| Vila Real (15)
| align=right | 4,328
| align=right | 4.7%
| align=right | 42.9
|-
| align=right | 12
| Coimbra (11)
| align=right | 3,947
| align=right | 4.3%
| align=right | 103.5
|-
| align=right | 13
| Leiria (2)
| align=right | 3,515
| align=right | 3.8%
| align=right | 130.5
|-
| align=right | 14
| Aveiro (12)
| align=right | 2,808
| align=right | 3.0%
| align=right | 249.6
|-
| align=right | 15
| Lisbon (1)
| align=right | 2,761
| align=right | 3.0%
| align=right | 824.1
|-
| align=right | 16
| Braga (17)
| align=right | 2,673
| align=right | 2.9%
| align=right | 316.6
|-
| align=right | 17
| Porto (16)
| align=right | 2,395
| align=right | 2.6%
| align=right | 745.5
|-
| align=right | 18
| Azores
| align=right | 2,333
| align=right | 2.5%
| align=right | 101.3
|-
| align=right | 19
| Viana do Castelo (18)
| align=right | 2,255
| align=right | 2.4%
| align=right | 102.6
|-
| align=right | 20
| Madeira
| align=right | 797
| align=right | 0.9%
| align=right | 314.6
|-
|
| | Portugal
| align=right | 92,104
| align=right | 100%
| align=right | 112.3
|}
By population density
{| class="wikitable"
|-
! Rank
! District
! Population
! Area (km²)
! Population <br />Density
|-
| align=right | 1
| Lisbon (1)
| align=right | 2,275,385
| align=right | 2,761
| align=right | 824.1
|-
| align=right | 2
| Porto (16)
| align=right | 1,785,405
| align=right | 2,395
| align=right | 745.5
|-
| align=right | 3
| Braga (17)
| align=right | 846,293
| align=right | 2,673
| align=right | 316.6
|-
| align=right | 4
| Madeira
| align=right | 250,744
| align=right | 797
| align=right | 314.6
|-
| align=right | 5
| Aveiro (12)
| align=right | 700,787
| align=right | 2,808
| align=right | 249.6
|-
| align=right | 6
| Setúbal (4)
| align=right | 874,806
| align=right | 5,064
| align=right | 172.8
|-
| align=right | 7
| Leiria (2)
| align=right | 458,605
| align=right | 3,515
| align=right | 130.5
|-
| align=right | 8
| Coimbra (11)
| align=right | 408,551
| align=right | 3,947
| align=right | 103.5
|-
| align=right | 9
| Viana do Castelo (18)
| align=right | 231,266
| align=right | 2,255
| align=right | 102.6
|-
| align=right | 10
| Azores
| align=right | 236,413
| align=right | 2,333
| align=right | 101.3
|-
| align=right | 11
| Faro (6)
| align=right | 467,343
| align=right | 4,960
| align=right | 94.2
|-
| align=right | 12
| Viseu (13)
| align=right | 351,292
| align=right | 5,007
| align=right | 70.2
|-
| align=right | 13
| Santarém (3)
| align=right | 424,973
| align=right | 6,747
| align=right | 63.0
|-
| align=right | 14
| Vila Real (15)
| align=right | 185,695
| align=right | 4,328
| align=right | 42.9
|-
| align=right | 15
| Castelo Branco (9)
| align=right | 177,962
| align=right | 6,675
| align=right | 26.7
|-
| align=right | 16
| Guarda (10)
| align=right | 142,974
| align=right | 5,518
| align=right | 25.9
|-
| align=right | 17
| Évora (7)
| align=right | 152,444
| align=right | 7,393
| align=right | 20.6
|-
| align=right | 18
| Bragança (14)
| align=right | 122,804
| align=right | 6,608
| align=right | 18.6
|-
| align=right | 19
| Portalegre (8)
| align=right | 104,923
| align=right | 6,065
| align=right | 17.3
|-
| align=right | 20
| Beja (5)
| align=right | 144,401
| align=right | 10,255
| align=right | 14.1
|-
|
| | Portugal
| align=right | 10,343,066
| align=right | 92,104
| align=right | 112.3
|}