Jefferson County Population 2018
Jefferson County's estimated population is 659,197 with a growth rate of -0.08% in the past year according to the most recent United States census data. Jefferson County is the 1st largest county in Alabama.
| Year | Population | Growth | Growth Rate |
| 2017 | 659,197 | -550 | -0.08% |
| 2016 | 659,747 | -340 | -0.05% |
| 2015 | 660,087 | 543 | 0.08% |
| 2014 | 659,544 | 817 | 0.12% |
| 2013 | 658,727 | 1,059 | 0.16% |
| 2012 | 657,668 | -121 | -0.02% |
| 2011 | 657,789 | -259 | -0.04% |
| 2010 | 658,048 | 6,523 | 1.00% |
| 1990 | 651,525 | -19,799 | -2.95% |
| 1980 | 671,324 | 26,333 | 4.08% |
| 1970 | 644,991 | 10,127 | 1.60% |
| 1960 | 634,864 | 75,936 | 13.59% |
| 1950 | 558,928 | 98,998 | 21.52% |
| 1940 | 459,930 | 28,437 | 6.59% |
| 1930 | 431,493 | 121,439 | 39.17% |
| 1920 | 310,054 | 83,578 | 36.90% |
| 1910 | 226,476 | 86,056 | 61.28% |
| 1900 | 140,420 | 51,919 | 58.66% |
| 1890 | 88,501 | 65,229 | 280.29% |
| 1880 | 23,272 | 10,927 | 88.51% |
| 1870 | 12,345 | 599 | 5.10% |
| 1860 | 11,746 | 2,757 | 30.67% |
| 1850 | 8,989 | 1,858 | 26.06% |
| 1840 | 7,131 | 276 | 4.03% |
| 1830 | 6,855 | 0.00% |