Editing Demographics of Sri Lanka (section)

===Age groups===
{{Hidden begin 
|title= Population by Sex and Age Group (Census 20.III.2012): <ref>{{cite web | url=https://unstats.un.org/unsd/demographic-social/products/dyb/dyb_2020/ | title=UNSD — Demographic and Social Statistics }}</ref>
|titlestyle = background:#EEBC35;
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{| class="wikitable"
|-
! width="80pt"|Age Group
! width="80pt"|Male
! width="80pt"|Female
! width="80pt"|Total
! width="80pt"|%
|-
| align="right" | Total
| align="right" | 9 856 634
| align="right" | 10 502 805 
| align="right" | 20 359 439
| align="right" | 100
|-
| align="right" | 0–4
| align="right" | 879 223
| align="right" | 864 639
| align="right" | 1 743 862
| align="right" | 8.57
|-
| align="right" | 5–9
| align="right" | 882 108 
| align="right" | 865 644
| align="right" | 1 747 752
| align="right" | 8.58
|-
| align="right" | 10–14
| align="right" | 829 069
| align="right" | 810 983
| align="right" | 1 640 052
| align="right" | 8.06
|-
| align="right" | 15–19
| align="right" | 819 927
| align="right" | 824 322 
| align="right" | 1 644 249
| align="right" | 8.08
|-
| align="right" | 20–24
| align="right" | 742 316
| align="right" | 790 567
| align="right" | 1 532 883
| align="right" | 7.53
|-
| align="right" | 25–29
| align="right" | 743 510
| align="right" | 809 338
| align="right" | 1 552 848
| align="right" | 7.63
|-
| align="right" | 30–34
| align="right" | 796 866
| align="right" | 842 549
| align="right" | 1 639 415
| align="right" | 8.05
|-
| align="right" | 35–39
| align="right" | 686 037
| align="right" | 723 040
| align="right" | 1 409 077
| align="right" | 6.92
|-
| align="right" | 40–44
| align="right" | 661 623
| align="right" | 697 586
| align="right" | 1 359 209
| align="right" | 6.68
|-
| align="right" | 45–49
| align="right" | 618 140
| align="right" | 667 690
| align="right" | 1 285 830
| align="right" | 6.32
|-
| align="right" | 50–54
| align="right" | 581 293
| align="right" | 638 167
| align="right" | 1 219 460 
| align="right" | 5.99
|-
| align="right" | 55–59
| align="right" | 500 871
| align="right" | 563 358
| align="right" | 1 064 229
| align="right" | 5.23
|-
| align="right" | 60–64
| align="right" | 425 428
| align="right" | 492 482
| align="right" | 917 910
| align="right" | 4.51
|-
| align="right" | 65-69
| align="right" | 283 764
| align="right" | 349 525
| align="right" | 633 289
| align="right" | 3.11
|-
| align="right" | 70-74
| align="right" | 181 846
| align="right" | 230 568
| align="right" | 412 414
| align="right" | 2.03
|-
| align="right" | 75-79
| align="right" | 116 389
| align="right" | 166 797
| align="right" | 283 186
| align="right" | 1.39
|-
| align="right" | 80-84
| align="right" | 64 250
| align="right" | 95 129
| align="right" | 159 379
| align="right" | 0.78
|-
| align="right" | 85-89
| align="right" | 28 293
| align="right" | 45 148
| align="right" | 73 441
| align="right" | 0.36
|-
| align="right" | 90-94
| align="right" | 9 293 
| align="right" | 14 965
| align="right" | 24 258
| align="right" | 0.12
|-
| align="right" | 95+
| align="right" | 6 388 
| align="right" | 10 308
| align="right" | 16 696
| align="right" | 0.08
|-
! width="50"|Age group 
! width="80pt"|Male
! width="80"|Female
! width="80"|Total
! width="50"|Percent
|-
| align="right" | 0–14
| align="right" | 2 590 400
| align="right" | 2 541 266
| align="right" | 5 131 666
| align="right" | 25.21
|-
| align="right" | 15–64
| align="right" | 6 576 011
| align="right" | 7 049 099
| align="right" | 13 625 110
| align="right" | 66.92
|-
| align="right" | 65+
| align="right" | 690 223
| align="right" | 912 440
| align="right" | 1 602 663
| align="right" | 7.87
|-
|}
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