Kansas Counties by Population (2026)
2026 Pop.
50K
100K
150K
200K
250K
300K
350K
400K
450K
500K
550K
600K
Top 5 Most Populous Counties
645,940
547,735
178,634
174,390
123,609
105 Counties
| County | 2026 Pop. ↓ | Area (mi²) | Density | Change (2020) |
|---|---|---|---|---|
| Johnson County | 645,940 | 474 | 1,363 | 5.69% |
| Sedgwick County | 547,735 | 1K | 549 | 4.36% |
| Shawnee County | 178,634 | 544 | 328 | -0.04% |
| Wyandotte County | 174,390 | 152 | 1,147 | 3.24% |
| Douglas County | 123,609 | 456 | 271 | 4.06% |
| Leavenworth County | 86,540 | 463 | 187 | 5.59% |
| Riley County | 74,325 | 610 | 122 | 3.21% |
| Butler County | 70,198 | 1.4K | 49 | 4.17% |
| Reno County | 61,413 | 1.3K | 49 | -0.78% |
| Saline County | 53,693 | 720 | 75 | -1.02% |
| Finney County | 39,064 | 1.3K | 30 | 1.97% |
| Crawford County | 38,774 | 590 | 66 | -0.45% |
| Miami County | 36,545 | 576 | 63 | 6.8% |
| Geary County | 35,993 | 385 | 93 | -2.1% |
| Ford County | 34,122 | 1.1K | 31 | -0.28% |
| Cowley County | 34,068 | 1.1K | 30 | -1.35% |
| Harvey County | 33,656 | 540 | 62 | -1% |
| Lyon County | 33,026 | 847 | 39 | 2.84% |
| McPherson County | 30,530 | 898 | 34 | 1.15% |
| Montgomery County | 29,865 | 644 | 46 | -4.89% |
| Ellis County | 29,181 | 900 | 32 | 0.79% |
| Pottawatomie County | 27,616 | 841 | 33 | 8.63% |
| Franklin County | 26,373 | 572 | 46 | 1.38% |
| Barton County | 24,703 | 895 | 28 | -2.84% |
| Sumner County | 22,222 | 1.2K | 19 | -0.45% |
| Seward County | 21,410 | 640 | 33 | -2.05% |
| Labette County | 19,410 | 645 | 30 | -3.72% |
| Cherokee County | 19,209 | 588 | 33 | -0.48% |
| Dickinson County | 18,999 | 847 | 22 | 3.44% |
| Jefferson County | 18,382 | 533 | 34 | 0.31% |
| Atchison County | 16,463 | 431 | 38 | 0.85% |
| Neosho County | 15,754 | 571 | 28 | -0.95% |
| Osage County | 15,615 | 706 | 22 | -0.79% |
| Bourbon County | 14,408 | 635 | 23 | 0.52% |
| Jackson County | 13,791 | 656 | 21 | 4.18% |
| Allen County | 12,343 | 500 | 25 | -1.55% |
| Marion County | 11,474 | 944 | 12 | -2.66% |
| Nemaha County | 9,998 | 717 | 14 | -2.58% |
| Marshall County | 9,924 | 900 | 11 | -0.98% |
| Linn County | 9,753 | 594 | 16 | 1.69% |
| Rice County | 9,242 | 726 | 13 | -1.52% |
| Pratt County | 9,197 | 735 | 13 | 0.63% |
| Brown County | 8,892 | 571 | 16 | -6.19% |
| Cloud County | 8,471 | 715 | 12 | -6.07% |
| Coffey County | 8,359 | 627 | 13 | -0.04% |
| Wilson County | 8,318 | 570 | 15 | -3.12% |
| Anderson County | 8,098 | 580 | 14 | 3.28% |
| Clay County | 7,915 | 645 | 12 | -2.61% |
| Thomas County | 7,690 | 1.1K | 7.2 | -3.06% |
| Doniphan County | 7,665 | 393 | 20 | 2.64% |
| Wabaunsee County | 7,190 | 794 | 9.1 | 4.35% |
| Grant County | 6,975 | 575 | 12 | -4.79% |
| Kingman County | 6,656 | 863 | 7.7 | -10.3% |
| Russell County | 6,494 | 886 | 7.3 | -2.68% |
| Ellsworth County | 6,174 | 716 | 8.6 | -3.09% |
| Pawnee County | 5,900 | 754 | 7.8 | -5.57% |
| Ottawa County | 5,875 | 721 | 8.1 | 2.51% |
| Mitchell County | 5,831 | 702 | 8.3 | 0.92% |
| Sherman County | 5,806 | 1.1K | 5.5 | -1.63% |
| Greenwood County | 5,795 | 1.1K | 5.1 | -3.01% |
| Gray County | 5,660 | 869 | 6.5 | 0.35% |
| Washington County | 5,610 | 895 | 6.3 | 1.52% |
| Harper County | 5,455 | 801 | 6.8 | -0.22% |
| Norton County | 5,377 | 878 | 6.1 | -1.38% |
| Morris County | 5,259 | 695 | 7.6 | -2.07% |
| Stevens County | 4,957 | 727 | 6.8 | -5.51% |
| Scott County | 4,818 | 718 | 6.7 | -6.14% |
| Rooks County | 4,692 | 891 | 5.3 | -3.97% |
| Phillips County | 4,675 | 886 | 5.3 | -5.73% |
| Republic County | 4,623 | 717 | 6.4 | -1.05% |
| Barber County | 4,054 | 1.1K | 3.6 | -3.55% |
| Meade County | 3,854 | 978 | 3.9 | -5.12% |
| Kearny County | 3,818 | 871 | 4.4 | -3.59% |
| Stafford County | 3,807 | 792 | 4.8 | -6.05% |
| Smith County | 3,541 | 895 | 4.0 | -0.51% |
| Haskell County | 3,513 | 578 | 6.1 | -6.57% |
| Chautauqua County | 3,297 | 639 | 5.2 | -2.46% |
| Osborne County | 3,179 | 893 | 3.6 | -8.94% |
| Woodson County | 3,079 | 498 | 6.2 | -0.65% |
| Lincoln County | 2,936 | 719 | 4.1 | -0.34% |
| Jewell County | 2,895 | 910 | 3.2 | -1.16% |
| Trego County | 2,806 | 889 | 3.2 | 0.07% |
| Rush County | 2,764 | 718 | 3.8 | -6.11% |
| Edwards County | 2,731 | 622 | 4.4 | -5.31% |
| Logan County | 2,726 | 1.1K | 2.5 | -0.62% |
| Decatur County | 2,684 | 894 | 3.0 | -2.29% |
| Cheyenne County | 2,670 | 1K | 2.6 | 2.22% |
| Ness County | 2,573 | 1.1K | 2.4 | -3.96% |
| Hamilton County | 2,546 | 1K | 2.6 | 2.37% |
| Gove County | 2,508 | 1.1K | 2.3 | -7.66% |
| Kiowa County | 2,500 | 723 | 3.5 | 1.92% |
| Chase County | 2,411 | 773 | 3.1 | -6.37% |
| Sheridan County | 2,373 | 896 | 2.6 | -2.87% |
| Graham County | 2,368 | 899 | 2.6 | -1.58% |
| Elk County | 2,352 | 644 | 3.7 | -4.85% |
| Rawlins County | 2,336 | 1.1K | 2.2 | -9.25% |
| Morton County | 2,271 | 730 | 3.1 | -15.98% |
| Stanton County | 2,189 | 680 | 3.2 | 4.99% |
| Wichita County | 2,030 | 719 | 2.8 | -5.54% |
| Clark County | 1,897 | 975 | 1.9 | -4.05% |
| Comanche County | 1,734 | 788 | 2.2 | 3.09% |
| Hodgeman County | 1,657 | 860 | 1.9 | -4.66% |
| Wallace County | 1,414 | 914 | 1.5 | -6.48% |
| Lane County | 1,380 | 717 | 1.9 | -12.1% |
| Greeley County | 1,108 | 778 | 1.4 | -13.1% |
Overview of Kansas Counties
There are 105 counties in Kansas.
Johnson County is the largest county in the state, with a population of 645,940. The most recent census shows that its population has increased by 0.06% since the previous census.
A number of other Kansas counties also boast relatively large populations for their state, though not able to match the density of Johnson County:
- Sedgwick County : 547,735
- Shawnee County : 178,634
Kansas Counties with the Fewest Residents
The smallest county in Kansas is Greeley County, with a population of just 1,108. This total represents a decrease of 0.1% since the last census count was performed.
Other small counties include:
- Lane County : 1,380
- Wallace County : 1,414
- Hodgeman County : 1,657
Kansas Counties with Rapid Growth
Pottawatomie County, with its current population of 27,616, has shown the largest population growth, with an increase of 0.1% since the last census.
Johnson County has also had relatively high population growth of 0.06% with 645,940 residents.
On the other hand, Morton County has had the largest decrease in population, with its 2,271 current residents totalling 0.2% less than the previous census.
Sources
- US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
- US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
- American Community Survey (2009 - 2013)
- Census QuickFacts
- Historical Populations of States and Counties (1790 - 1990)