Chicago, IL Population by Decades
| Date |
Population |
Population
Change |
Annual
% Change |
| 1900 | 2,152,109 | - | - |
| 1910 | 2,770,861 | 618,752 | 2.6 |
| 1920 | 3,454,989 | 684,128 | 2.2 |
| 1930 | 4,511,523 | 1,056,534 | 2.7 |
| 1940 | 4,633,534 | 122,011 | 0.3 |
| 1950 | 5,249,981 | 616,447 | 1.3 |
| 1960 | 6,312,517 | 1,062,536 | 1.9 |
| 1970 | 7,103,510 | 790,993 | 1.2 |
| 1980 | 7,246,032 | 142,522 | 0.2 |
| 1990 | 7,410,858 | 164,826 | 0.2 |
| 2000 | 8,272,768 | 861,910 | 1.1 |
Source: U.S. Bureau of Census
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