Jersey County, Illinois Population 2018
Jersey County, Illinois's estimated population is 21,941 with a growth rate of -2.23% in the past year according to the most recent United States census data. Jersey County, Illinois is the 53rd largest county in Illinois.
| Year | Population | Growth | Growth Rate |
| 2017 | 21,941 | -500 | -2.23% |
| 2016 | 22,441 | 496 | 2.26% |
| 2016 | 21,945 | -248 | -1.12% |
| 2015 | 22,193 | -249 | -1.11% |
| 2014 | 22,442 | -114 | -0.51% |
| 2013 | 22,556 | -114 | -0.50% |
| 2012 | 22,670 | -172 | -0.75% |
| 2011 | 22,842 | -127 | -0.55% |
| 2010 | 22,969 | 2,430 | 11.83% |
| 1990 | 20,539 | 1 | 0.00% |
| 1980 | 20,538 | 2,046 | 11.06% |
| 1970 | 18,492 | 1,469 | 8.63% |
| 1960 | 17,023 | 1,759 | 11.52% |
| 1950 | 15,264 | 1,628 | 11.94% |
| 1940 | 13,636 | 1,080 | 8.60% |
| 1930 | 12,556 | -126 | -0.99% |
| 1920 | 12,682 | -1,272 | -9.12% |
| 1910 | 13,954 | -658 | -4.50% |
| 1900 | 14,612 | -198 | -1.34% |
| 1890 | 14,810 | -732 | -4.71% |
| 1880 | 15,542 | 488 | 3.24% |
| 1870 | 15,054 | 3,003 | 24.92% |
| 1860 | 12,051 | 4,697 | 63.87% |
| 1850 | 7,354 | 2,819 | 62.16% |
| 1840 | 4,535 | 0.00% |