Dickinson County Population 2018
Dickinson County's estimated population is 17,199 with a growth rate of 0.56% in the past year according to the most recent United States census data. Dickinson County is the 41st largest county in Iowa.
| Year | Population | Growth | Growth Rate |
| 2017 | 17,199 | 95 | 0.56% |
| 2016 | 17,104 | 114 | 0.67% |
| 2015 | 16,990 | 160 | 0.95% |
| 2014 | 16,830 | -46 | -0.27% |
| 2013 | 16,876 | -48 | -0.28% |
| 2012 | 16,924 | 67 | 0.40% |
| 2011 | 16,857 | 187 | 1.12% |
| 2010 | 16,670 | 1,761 | 11.81% |
| 1990 | 14,909 | -720 | -4.61% |
| 1980 | 15,629 | 3,064 | 24.39% |
| 1970 | 12,565 | -9 | -0.07% |
| 1960 | 12,574 | -182 | -1.43% |
| 1950 | 12,756 | 571 | 4.69% |
| 1940 | 12,185 | 1,203 | 10.95% |
| 1930 | 10,982 | 741 | 7.24% |
| 1920 | 10,241 | 2,104 | 25.86% |
| 1910 | 8,137 | 142 | 1.78% |
| 1900 | 7,995 | 3,667 | 84.73% |
| 1890 | 4,328 | 2,427 | 127.67% |
| 1880 | 1,901 | 512 | 36.86% |
| 1870 | 1,389 | 1,209 | 671.67% |
| 1860 | 180 | 0.00% |