Decatur, AL Population by Decades
| Date |
Population |
Population
Change |
Annual
% Change |
| 1900 | 48,944 | - | - |
| 1910 | 55,765 | 6,821 | 1.3 |
| 1920 | 64,503 | 8,738 | 1.5 |
| 1930 | 73,118 | 8,615 | 1.3 |
| 1940 | 76,028 | 2,910 | 0.4 |
| 1950 | 80,052 | 4,024 | 0.5 |
| 1960 | 84,955 | 4,903 | 0.6 |
| 1970 | 104,587 | 19,632 | 2.1 |
| 1980 | 120,401 | 15,814 | 1.4 |
| 1990 | 131,556 | 11,155 | 0.9 |
| 2000 | 145,867 | 14,311 | 1.0 |
Source: U.S. Bureau of Census
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