The graph below ranks each Kansas County by total residents according to the 2006 census estimates.
Kansas total population by county
| County | Total Population |
| Johnson |  516,731 |
| Sedgwick | 470,895 |
| Shawnee | 172,693 |
| Wyandotte | 155,509 |
| Douglas | 112,123 |
| Leavenworth | 73,628 |
| Reno | 63,706 |
| Butler | 63,147 |
| Riley | 62,527 |
| Saline | 54,170 |
| Finney | 39,097 |
| Crawford | 38,059 |
| Lyon | 35,369 |
| Cowley | 34,931 |
| Montgomery | 34,692 |
| Ford | 33,783 |
| Harvey | 33,643 |
| Miami | 30,900 |
| McPherson | 29,380 |
| Barton | 27,511 |
| Ellis | 26,926 |
| Franklin | 26,513 |
| Sumner | 24,441 |
| Geary | 24,174 |
| Seward | 23,404 |
| Labette | 22,203 |
| Cherokee | 21,451 |
| Dickinson | 19,322 |
| Pottawatomie | 19,220 |
| Jefferson | 18,848 |
| Osage | 16,958 |
| Atchison | 16,745 |
| Neosho | 16,298 |
| Bourbon | 14,950 |
| Allen | 13,677 |
| Jackson | 13,500 |
| Marion | 12,760 |
| Nemaha | 10,374 |
| Marshall | 10,349 |
| Rice | 10,295 |
| Brown | 10,236 |
| Linn | 9,962 |
| Wilson | 9,889 |
| Cloud | 9,594 |
| Pratt | 9,436 |
| Coffey | 8,701 |
| Clay | 8,625 |
| Anderson | 8,051 |
| Kingman | 7,975 |
| Doniphan | 7,865 |
| Grant | 7,552 |
| Thomas | 7,468 |
| Greenwood | 7,067 |
| Wabaunsee | 6,895 |
| Russell | 6,740 |
| Pawnee | 6,515 |
| Ellsworth | 6,332 |
| Mitchell | 6,299 |
| Ottawa | 6,168 |
| Morris | 6,046 |
| Sherman | 5,981 |
| Harper | 5,952 |
| Washington | 5,944 |
| Gray | 5,852 |
| Norton | 5,584 |
| Phillips | 5,444 |
| Rooks | 5,290 |
| Stevens | 5,287 |
| Republic | 5,033 |
| Barber | 4,974 |
| Scott | 4,643 |
| Meade | 4,561 |
| Kearny | 4,469 |
| Stafford | 4,435 |
| Haskell | 4,171 |
| Smith | 4,024 |
| Osborne | 3,978 |
| Chautauqua | 3,953 |
| Woodson | 3,507 |
| Lincoln | 3,396 |
| Jewell | 3,324 |
| Rush | 3,317 |
| Morton | 3,138 |
| Edwards | 3,138 |
| Decatur | 3,120 |
| Elk | 3,077 |
| Chase | 3,070 |
| Trego | 2,993 |
| Kiowa | 2,969 |
| Ness | 2,946 |
| Cheyenne | 2,911 |
| Gove | 2,721 |
| Graham | 2,677 |
| Logan | 2,675 |
| Rawlins | 2,643 |
| Sheridan | 2,600 |
| Hamilton | 2,594 |
| Wichita | 2,288 |
| Stanton | 2,232 |
| Clark | 2,206 |
| Hodgeman | 2,071 |
| Comanche | 1,884 |
| Lane | 1,797 |
| Wallace | 1,557 |
| Greeley | 1,331 |