The graph below ranks each Kansas County by total residents according to the 2012 census estimates.
Kansas total population by county
| County | Total Population |
| Johnson |  559,836 |
| Sedgwick | 503,438 |
| Shawnee | 179,060 |
| Wyandotte | 159,175 |
| Douglas | 113,043 |
| Leavenworth | 77,710 |
| Riley | 76,030 |
| Butler | 65,730 |
| Reno | 64,245 |
| Saline | 55,815 |
| Crawford | 39,314 |
| Geary | 38,257 |
| Finney | 37,161 |
| Cowley | 36,244 |
| Harvey | 34,817 |
| Ford | 34,675 |
| Montgomery | 34,362 |
| Lyon | 33,554 |
| Miami | 32,600 |
| McPherson | 29,351 |
| Ellis | 29,101 |
| Barton | 27,577 |
| Franklin | 25,835 |
| Sumner | 23,698 |
| Seward | 23,409 |
| Pottawatomie | 22,369 |
| Cherokee | 21,213 |
| Labette | 21,196 |
| Dickinson | 19,806 |
| Jefferson | 18,904 |
| Atchison | 16,821 |
| Neosho | 16,445 |
| Osage | 16,202 |
| Bourbon | 14,894 |
| Jackson | 13,454 |
| Allen | 13,349 |
| Marion | 12,376 |
| Nemaha | 10,129 |
| Marshall | 10,053 |
| Rice | 10,013 |
| Brown | 9,909 |
| Pratt | 9,804 |
| Linn | 9,476 |
| Cloud | 9,361 |
| Wilson | 9,123 |
| Clay | 8,523 |
| Coffey | 8,490 |
| Anderson | 7,942 |
| Thomas | 7,922 |
| Grant | 7,904 |
| Doniphan | 7,869 |
| Kingman | 7,835 |
| Wabaunsee | 7,048 |
| Russell | 6,965 |
| Pawnee | 6,930 |
| Ellsworth | 6,472 |
| Greenwood | 6,464 |
| Mitchell | 6,374 |
| Sherman | 6,137 |
| Ottawa | 6,057 |
| Gray | 6,000 |
| Harper | 5,888 |
| Morris | 5,870 |
| Stevens | 5,762 |
| Washington | 5,749 |
| Norton | 5,609 |
| Phillips | 5,520 |
| Rooks | 5,211 |
| Scott | 4,927 |
| Barber | 4,881 |
| Republic | 4,861 |
| Meade | 4,436 |
| Stafford | 4,355 |
| Haskell | 4,232 |
| Kearny | 3,969 |
| Osborne | 3,821 |
| Smith | 3,747 |
| Chautauqua | 3,571 |
| Woodson | 3,255 |
| Rush | 3,209 |
| Lincoln | 3,162 |
| Morton | 3,141 |
| Ness | 3,082 |
| Jewell | 3,029 |
| Edwards | 2,972 |
| Trego | 2,970 |
| Decatur | 2,890 |
| Logan | 2,805 |
| Chase | 2,752 |
| Gove | 2,722 |
| Cheyenne | 2,683 |
| Elk | 2,674 |
| Hamilton | 2,622 |
| Graham | 2,583 |
| Sheridan | 2,543 |
| Rawlins | 2,534 |
| Kiowa | 2,506 |
| Wichita | 2,240 |
| Stanton | 2,188 |
| Clark | 2,175 |
| Hodgeman | 1,958 |
| Comanche | 1,921 |
| Lane | 1,706 |
| Wallace | 1,530 |
| Greeley | 1,271 |