Croydon Population Estimates by age bands
| Age (years) | Numbers |
| 0-4 years | 27,681 |
| 5-10 years | 32,493 |
| 11-17 years | 34,757 |
| 18-64 years | 238,582 |
| 65+ years | 53,197 |
| Total Population | 386,710 |
Source : ONS, Mid Year Population Estimates, 2019, released June 2020.
Croydon Population Estimates by single year of age
| Females | Males | Total | |
| All ages | 198,835 | 187,875 | 386,710 |
| 0 | 2,661 | 2,672 | 5,333 |
| 1 | 2,672 | 2,902 | 5,574 |
| 2 | 2,771 | 2,842 | 5,613 |
| 3 | 2,787 | 2,934 | 5,721 |
| 4 | 2,602 | 2,838 | 5,440 |
| 5 | 2,625 | 2,750 | 5,375 |
| 6 | 2,655 | 2,783 | 5,438 |
| 7 | 2,728 | 2,782 | 5,510 |
| 8 | 2,679 | 2,809 | 5,488 |
| 9 | 2,728 | 2,732 | 5,460 |
| 10 | 2,600 | 2,622 | 5,222 |
| 11 | 2,745 | 2,770 | 5,515 |
| 12 | 2,562 | 2,758 | 5,320 |
| 13 | 2,430 | 2,541 | 4,971 |
| 14 | 2,465 | 2,470 | 4,935 |
| 15 | 2,314 | 2,443 | 4,757 |
| 16 | 2,254 | 2,369 | 4,623 |
| 17 | 2,297 | 2,339 | 4,636 |
| 18 | 2,184 | 2,350 | 4,534 |
| 19 | 1,621 | 1,851 | 3,472 |
| 20 | 1,552 | 1,713 | 3,265 |
| 21 | 1,672 | 1,729 | 3,401 |
| 22 | 1,928 | 2,045 | 3,973 |
| 23 | 2,240 | 2,190 | 4,430 |
| 24 | 2,256 | 2,350 | 4,606 |
| 25 | 2,270 | 2,338 | 4,608 |
| 26 | 2,395 | 2,244 | 4,639 |
| 27 | 2,604 | 2,424 | 5,028 |
| 28 | 2,820 | 2,634 | 5,454 |
| 29 | 2,868 | 2,548 | 5,416 |
| 30 | 3,145 | 2,692 | 5,837 |
| 31 | 2,945 | 2,881 | 5,826 |
| 32 | 3,121 | 2,819 | 5,940 |
| 33 | 3,377 | 2,958 | 6,335 |
| 34 | 3,058 | 2,819 | 5,877 |
| 35 | 3,007 | 2,737 | 5,744 |
| 36 | 3,147 | 2,710 | 5,857 |
| 37 | 3,345 | 2,897 | 6,242 |
| 38 | 3,113 | 2,882 | 5,995 |
| 39 | 3,050 | 2,720 | 5,770 |
| 40 | 3,116 | 2,779 | 5,895 |
| 41 | 2,804 | 2,828 | 5,632 |
| 42 | 2,954 | 2,569 | 5,523 |
| 43 | 2,811 | 2,600 | 5,411 |
| 44 | 2,614 | 2,664 | 5,278 |
| 45 | 2,442 | 2,590 | 5,032 |
| 46 | 2,542 | 2,443 | 4,985 |
| 47 | 2,810 | 2,492 | 5,302 |
| 48 | 2,788 | 2,517 | 5,305 |
| 49 | 2,757 | 2,432 | 5,189 |
| 50 | 2,801 | 2,586 | 5,387 |
| 51 | 2,771 | 2,556 | 5,327 |
| 52 | 2,765 | 2,584 | 5,349 |
| 53 | 2,989 | 2,804 | 5,793 |
| 54 | 2,826 | 2,690 | 5,516 |
| 55 | 2,896 | 2,752 | 5,648 |
| 56 | 2,910 | 2,565 | 5,475 |
| 57 | 2,663 | 2,561 | 5,224 |
| 58 | 2,332 | 2,365 | 4,697 |
| 59 | 2,352 | 2,284 | 4,636 |
| 60 | 2,252 | 2,083 | 4,335 |
| 61 | 2,079 | 1,988 | 4,067 |
| 62 | 1,975 | 1,888 | 3,863 |
| 63 | 2,041 | 1,770 | 3,811 |
| 64 | 1,939 | 1,714 | 3,653 |
| 65 | 1,789 | 1,660 | 3,449 |
| 66 | 1,715 | 1,471 | 3,186 |
| 67 | 1,671 | 1,472 | 3,143 |
| 68 | 1,592 | 1,372 | 2,964 |
| 69 | 1,501 | 1,333 | 2,834 |
| 70 | 1,420 | 1,288 | 2,708 |
| 71 | 1,537 | 1,381 | 2,918 |
| 72 | 1,644 | 1,481 | 3,125 |
| 73 | 1,329 | 1,102 | 2,431 |
| 74 | 1,157 | 1,023 | 2,180 |
| 75 | 1,189 | 938 | 2,127 |
| 76 | 1,180 | 924 | 2,104 |
| 77 | 1,029 | 815 | 1,844 |
| 78 | 910 | 750 | 1,660 |
| 79 | 956 | 766 | 1,722 |
| 80 | 937 | 687 | 1,624 |
| 81 | 927 | 701 | 1,628 |
| 82 | 876 | 654 | 1,530 |
| 83 | 786 | 639 | 1,425 |
| 84 | 716 | 579 | 1,295 |
| 85 | 661 | 489 | 1,150 |
| 86 | 593 | 439 | 1,032 |
| 87 | 559 | 397 | 956 |
| 88 | 481 | 303 | 784 |
| 89 | 377 | 252 | 629 |
| 90+ | 1,781 | 968 | 2,749 |
Source : ONS, Mid Year Population Estimates, 2019, Released June 2020.