Forrest County Population 2018
Forrest County's estimated population is 75,471 with a growth rate of -0.22% in the past year according to the most recent United States census data. Forrest County is the 9th largest county in Mississippi.
| Year | Population | Growth | Growth Rate |
| 2017 | 75,471 | -166 | -0.22% |
| 2016 | 75,637 | -6 | -0.01% |
| 2015 | 75,643 | -165 | -0.22% |
| 2014 | 75,808 | -806 | -1.05% |
| 2013 | 76,614 | 170 | 0.22% |
| 2012 | 76,444 | 646 | 0.85% |
| 2011 | 75,798 | 791 | 1.05% |
| 2010 | 75,007 | 6,693 | 9.80% |
| 1990 | 68,314 | 2,296 | 3.48% |
| 1980 | 66,018 | 8,169 | 14.12% |
| 1970 | 57,849 | 5,127 | 9.72% |
| 1960 | 52,722 | 7,667 | 17.02% |
| 1950 | 45,055 | 10,154 | 29.09% |
| 1940 | 34,901 | 4,786 | 15.89% |
| 1930 | 30,115 | 8,877 | 41.80% |
| 1920 | 21,238 | 516 | 2.49% |
| 1910 | 20,722 | 0.00% |