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Demographic features of the population of Kiribati include population density, ethnicity, education level, health of the populace, economic status, religious affiliations, and other metrics.
Population
- 110,136 (2015 census)
- 119,940 (2020 census)
Population structure
{| class="wikitable"
|-
! width="80pt"|Age group
! width="80pt"|Male
! width="80pt"|Female
! width="80pt"|Total
! width="80pt"|%
|-
| align="right" | Total
| align="right" | 54 096
| align="right" | 56 040
| align="right" | 110 136
| align="right" | 100
|-
| align="right" | 0–4
| align="right" | 7 546
| align="right" | 6 847
| align="right" | 14 393
| align="right" | 13.07
|-
| align="right" | 5–9
| align="right" | 6 903
| align="right" | 6 697
| align="right" | 13 600
| align="right" | 12.35
|-
| align="right" | 10–14
| align="right" | 5 309
| align="right" | 5 136
| align="right" | 10 445
| align="right" | 9.48
|-
| align="right" | 15–19
| align="right" | 5 851
| align="right" | 5 825
| align="right" | 11 676
| align="right" | 10.60
|-
| align="right" | 20–24
| align="right" | 5 199
| align="right" | 5 120
| align="right" | 10 319
| align="right" | 9.37
|-
| align="right" | 25–29
| align="right" | 4 682
| align="right" | 4 990
| align="right" | 9 672
| align="right" | 8.78
|-
| align="right" | 30–34
| align="right" | 3 838
| align="right" | 4 174
| align="right" | 8 012
| align="right" | 7.27
|-
| align="right" | 35–39
| align="right" | 3 161
| align="right" | 3 423
| align="right" | 6 584
| align="right" | 5.98
|-
| align="right" | 40–44
| align="right" | 2 433
| align="right" | 2 658
| align="right" | 5 091
| align="right" | 4.62
|-
| align="right" | 45–49
| align="right" | 2 676
| align="right" | 3 031
| align="right" | 5 707
| align="right" | 5.18
|-
| align="right" | 50–54
| align="right" | 2 372
| align="right" | 2 533
| align="right" | 4 905
| align="right" | 4.45
|-
| align="right" | 55–59
| align="right" | 1 548
| align="right" | 1 773
| align="right" | 3 321
| align="right" | 3.02
|-
| align="right" | 60–64
| align="right" | 1 051
| align="right" | 1 355
| align="right" | 2 406
| align="right" | 2.18
|-
| align="right" | 65–69
| align="right" | 731
| align="right" | 1 017
| align="right" | 1 748
| align="right" | 1.59
|-
| align="right" | 70–74
| align="right" | 460
| align="right" | 778
| align="right" | 1 238
| align="right" | 1.12
|-
| align="right" | 75–79
| align="right" | 217
| align="right" | 391
| align="right" | 608
| align="right" | 0.55
|-
| align="right" | 80–84
| align="right" | 80
| align="right" | 187
| align="right" | 267
| align="right" | 0.24
|-
| align="right" | 85–89
| align="right" | 30
| align="right" | 79
| align="right" | 109
| align="right" | 0.10
|-
| align="right" | 90–94
| align="right" | 7
| align="right" | 17
| align="right" | 24
| align="right" | 0.02
|-
| align="right" | 95–99
| align="right" | 2
| align="right" | 9
| align="right" | 11
| align="right" | 0.01
|-
| align="right" | 100+
| align="right" | 0
| align="right" | 0
| align="right" | 0
| align="right" | 0
|-
! width="50"|Age group
! width="80pt"|Male
! width="80"|Female
! width="80"|Total
! width="50"|Percent
|-
| align="right" | 0–14
| align="right" | 19 758
| align="right" | 18 680
| align="right" | 38 438
| align="right" | 34.90
|-
| align="right" | 15–64
| align="right" | 32 811
| align="right" | 34 882
| align="right" | 67 693
| align="right" | 61.46
|-
| align="right" | 65+
| align="right" | 1 527
| align="right" | 2 478
| align="right" | 4 005
| align="right" | 3.64
|-
|}