Billings, MT Population by Decades
| Date |
Population |
Population
Change |
Annual
% Change |
| 1900 | 6,212 | - | - |
| 1910 | 22,944 | 16,732 | 14.0 |
| 1920 | 29,600 | 6,656 | 2.6 |
| 1930 | 30,785 | 1,185 | 0.4 |
| 1940 | 41,182 | 10,397 | 3.0 |
| 1950 | 55,875 | 14,693 | 3.1 |
| 1960 | 79,016 | 23,141 | 3.5 |
| 1970 | 87,367 | 8,351 | 1.0 |
| 1980 | 108,035 | 20,668 | 2.1 |
| 1990 | 113,419 | 5,384 | 0.5 |
| 2000 | 129,352 | 15,933 | 1.3 |
Source: U.S. Bureau of Census
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