Kearny County, Kansas Population 2019
Kearny County, Kansas's estimated population is 3,940 with a growth rate of 0.97% in the past year according to the most recent United States census data. Kearny County, Kansas is the 75th largest county in Kansas.
| Year | Population | Growth | Growth Rate |
| 2018 | 3,943 | 3 | 0.08% |
| 2017 | 3,940 | 38 | 0.97% |
| 2016 | 3,902 | -34 | -0.86% |
| 2015 | 3,936 | -3 | -0.08% |
| 2014 | 3,939 | 27 | 0.69% |
| 2013 | 3,912 | -60 | -1.51% |
| 2012 | 3,972 | 14 | 0.35% |
| 2011 | 3,958 | -44 | -1.10% |
| 2010 | 4,002 | -25 | -0.62% |
| 1990 | 4,027 | 592 | 17.23% |
| 1980 | 3,435 | 388 | 12.73% |
| 1970 | 3,047 | -61 | -1.96% |
| 1960 | 3,108 | -384 | -11.00% |
| 1950 | 3,492 | 967 | 38.30% |
| 1940 | 2,525 | -671 | -20.99% |
| 1930 | 3,196 | 579 | 22.12% |
| 1920 | 2,617 | -589 | -18.37% |
| 1910 | 3,206 | 2,099 | 189.61% |
| 1900 | 1,107 | -464 | -29.54% |
| 1890 | 1,571 | 1,412 | 888.05% |
| 1880 | 159 | 0.00% |