Ellis County Population 2018
Ellis County's estimated population is 28,689 with a growth rate of -0.46% in the past year according to the most recent United States census data. Ellis County is the 21st largest county in Kansas.
| Year | Population | Growth | Growth Rate |
| 2017 | 28,689 | -134 | -0.46% |
| 2016 | 28,823 | -106 | -0.37% |
| 2015 | 28,929 | -5 | -0.02% |
| 2014 | 28,934 | -78 | -0.27% |
| 2013 | 29,012 | -62 | -0.21% |
| 2012 | 29,074 | 322 | 1.12% |
| 2011 | 28,752 | 328 | 1.15% |
| 2010 | 28,424 | 2,420 | 9.31% |
| 1990 | 26,004 | -94 | -0.36% |
| 1980 | 26,098 | 1,368 | 5.53% |
| 1970 | 24,730 | 3,460 | 16.27% |
| 1960 | 21,270 | 2,227 | 11.69% |
| 1950 | 19,043 | 1,535 | 8.77% |
| 1940 | 17,508 | 1,601 | 10.06% |
| 1930 | 15,907 | 1,769 | 12.51% |
| 1920 | 14,138 | 1,968 | 16.17% |
| 1910 | 12,170 | 3,544 | 41.09% |
| 1900 | 8,626 | 684 | 8.61% |
| 1890 | 7,942 | 1,763 | 28.53% |
| 1880 | 6,179 | 4,843 | 362.50% |
| 1870 | 1,336 | 0.00% |