Boulder-Longmont, CO Population by Decades
| Date |
Population |
Population
Change |
Annual
% Change |
| 1900 | 21,544 | - | - |
| 1910 | 30,330 | 8,786 | 3.5 |
| 1920 | 31,861 | 1,531 | 0.5 |
| 1930 | 32,456 | 595 | 0.2 |
| 1940 | 37,438 | 4,982 | 1.4 |
| 1950 | 48,296 | 10,858 | 2.6 |
| 1960 | 74,254 | 25,958 | 4.4 |
| 1970 | 131,889 | 57,635 | 5.9 |
| 1980 | 189,625 | 57,736 | 3.7 |
| 1990 | 225,339 | 35,714 | 1.7 |
| 2000 | 291,288 | 65,949 | 2.6 |
Source: U.S. Bureau of Census
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