Altoona, PA Population by Decades
| Date |
Population |
Population
Change |
Annual
% Change |
| 1900 | 85,099 | - | - |
| 1910 | 108,858 | 23,759 | 2.5 |
| 1920 | 128,334 | 19,476 | 1.7 |
| 1930 | 139,840 | 11,506 | 0.9 |
| 1940 | 140,358 | 518 | 0.0 |
| 1950 | 139,514 | -844 | -0.1 |
| 1960 | 137,270 | -2,244 | -0.2 |
| 1970 | 135,356 | -1,914 | -0.1 |
| 1980 | 136,621 | 1,265 | 0.1 |
| 1990 | 130,542 | -6,079 | -0.5 |
| 2000 | 129,144 | -1,398 | -0.1 |
Source: U.S. Bureau of Census
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