| County | Rank | Change (2020) ↓ | 2025 Pop. | 2020 Pop. |
|---|---|---|---|---|
| Pottawatomie County | 1 | 7.18% | 27,246 | 25,421 |
| Miami County | 2 | 5.62% | 36,141 | 34,219 |
| Johnson County | 3 | 4.57% | 639,108 | 611,161 |
| Leavenworth County | 4 | 4.45% | 85,605 | 81,961 |
| Wabaunsee County | 5 | 3.79% | 7,151 | 6,890 |
| Butler County | 6 | 3.4% | 69,678 | 67,389 |
| Douglas County | 7 | 3.38% | 122,799 | 118,787 |
| Sedgwick County | 8 | 3.25% | 541,908 | 524,837 |
| Jackson County | 9 | 3.17% | 13,658 | 13,238 |
| Dickinson County | 10 | 2.41% | 18,810 | 18,367 |
| Ottawa County | 11 | 2.32% | 5,864 | 5,731 |
| Stanton County | 12 | 2.16% | 2,130 | 2,085 |
| Linn County | 13 | 2.15% | 9,797 | 9,591 |
| Anderson County | 14 | 2.07% | 8,003 | 7,841 |
| Lyon County | 15 | 2.06% | 32,773 | 32,113 |
| Doniphan County | 16 | 2.04% | 7,620 | 7,468 |
| Riley County | 17 | 1.99% | 73,441 | 72,011 |
| Comanche County | 18 | 1.9% | 1,714 | 1,682 |
| Wyandotte County | 19 | 1.77% | 171,904 | 168,920 |
| Cheyenne County | 20 | 1.76% | 2,658 | 2,612 |
| Hamilton County | 21 | 1.21% | 2,517 | 2,487 |
| Franklin County | 22 | 1.18% | 26,323 | 26,015 |
| Washington County | 23 | 1.18% | 5,591 | 5,526 |
| Finney County | 24 | 1.04% | 38,709 | 38,310 |
| Gray County | 25 | 0.98% | 5,695 | 5,640 |
| McPherson County | 26 | 0.82% | 30,432 | 30,184 |
| Mitchell County | 27 | 0.67% | 5,817 | 5,778 |
| Kiowa County | 28 | 0.61% | 2,468 | 2,453 |
| Bourbon County | 29 | 0.58% | 14,416 | 14,333 |
| Ellis County | 30 | 0.49% | 29,094 | 28,951 |
| Pratt County | 31 | 0.31% | 9,167 | 9,139 |
| Atchison County | 32 | 0.19% | 16,356 | 16,325 |
| Jefferson County | 33 | 0.17% | 18,357 | 18,325 |
| Woodson County | 34 | -0.13% | 3,095 | 3,099 |
| Sumner County | 35 | -0.2% | 22,279 | 22,323 |
| Shawnee County | 36 | -0.24% | 178,288 | 178,711 |
| Crawford County | 37 | -0.29% | 38,839 | 38,951 |
| Ford County | 38 | -0.35% | 34,097 | 34,218 |
| Coffey County | 39 | -0.38% | 8,330 | 8,362 |
| Osage County | 40 | -0.41% | 15,676 | 15,740 |
| Lincoln County | 41 | -0.48% | 2,932 | 2,946 |
| Trego County | 42 | -0.5% | 2,790 | 2,804 |
| Smith County | 43 | -0.51% | 3,541 | 3,559 |
| Harper County | 44 | -0.6% | 5,434 | 5,467 |
| Cherokee County | 45 | -0.67% | 19,171 | 19,301 |
| Reno County | 46 | -0.77% | 61,415 | 61,894 |
| Marshall County | 47 | -0.85% | 9,937 | 10,022 |
| Harvey County | 48 | -1.02% | 33,649 | 33,996 |
| Jewell County | 49 | -1.09% | 2,897 | 2,929 |
| Republic County | 50 | -1.16% | 4,618 | 4,672 |
| Cowley County | 51 | -1.18% | 34,127 | 34,535 |
| Logan County | 52 | -1.2% | 2,710 | 2,743 |
| Allen County | 53 | -1.22% | 12,384 | 12,537 |
| Saline County | 54 | -1.24% | 53,576 | 54,248 |
| Rice County | 55 | -1.3% | 9,263 | 9,385 |
| Graham County | 56 | -1.54% | 2,369 | 2,406 |
| Neosho County | 57 | -1.58% | 15,653 | 15,905 |
| Decatur County | 58 | -1.71% | 2,700 | 2,747 |
| Sherman County | 59 | -1.71% | 5,801 | 5,902 |
| Russell County | 60 | -1.74% | 6,557 | 6,673 |
| Norton County | 61 | -1.76% | 5,356 | 5,452 |
| Marion County | 62 | -1.82% | 11,572 | 11,787 |
| Chautauqua County | 63 | -1.83% | 3,318 | 3,380 |
| Morris County | 64 | -1.88% | 5,269 | 5,370 |
| Ellsworth County | 65 | -1.98% | 6,245 | 6,371 |
| Nemaha County | 66 | -2.27% | 10,030 | 10,263 |
| Clay County | 67 | -2.28% | 7,942 | 8,127 |
| Seward County | 68 | -2.35% | 21,343 | 21,857 |
| Thomas County | 69 | -2.36% | 7,746 | 7,933 |
| Sheridan County | 70 | -2.37% | 2,385 | 2,443 |
| Greenwood County | 71 | -2.38% | 5,833 | 5,975 |
| Barton County | 72 | -2.58% | 24,769 | 25,426 |
| Wilson County | 73 | -2.66% | 8,358 | 8,586 |
| Geary County | 74 | -2.83% | 35,726 | 36,766 |
| Labette County | 75 | -3.02% | 19,551 | 20,160 |
| Ness County | 76 | -3.14% | 2,595 | 2,679 |
| Elk County | 77 | -3.16% | 2,394 | 2,472 |
| Barber County | 78 | -3.35% | 4,062 | 4,203 |
| Rooks County | 79 | -3.4% | 4,720 | 4,886 |
| Kearny County | 80 | -3.71% | 3,813 | 3,960 |
| Montgomery County | 81 | -3.94% | 30,162 | 31,400 |
| Grant County | 82 | -3.96% | 7,036 | 7,326 |
| Hodgeman County | 83 | -4.2% | 1,665 | 1,738 |
| Chase County | 84 | -4.5% | 2,459 | 2,575 |
| Wichita County | 85 | -4.56% | 2,051 | 2,149 |
| Wallace County | 86 | -4.56% | 1,443 | 1,512 |
| Meade County | 87 | -4.65% | 3,873 | 4,062 |
| Clark County | 88 | -4.65% | 1,885 | 1,977 |
| Cloud County | 89 | -4.67% | 8,597 | 9,018 |
| Pawnee County | 90 | -4.67% | 5,956 | 6,248 |
| Stevens County | 91 | -4.77% | 4,996 | 5,246 |
| Brown County | 92 | -4.87% | 9,017 | 9,479 |
| Stafford County | 93 | -4.89% | 3,854 | 4,052 |
| Gove County | 94 | -4.9% | 2,583 | 2,716 |
| Phillips County | 95 | -5.14% | 4,704 | 4,959 |
| Scott County | 96 | -5.2% | 4,866 | 5,133 |
| Edwards County | 97 | -5.31% | 2,731 | 2,884 |
| Rush County | 98 | -5.33% | 2,787 | 2,944 |
| Haskell County | 99 | -5.53% | 3,552 | 3,760 |
| Osborne County | 100 | -6.45% | 3,266 | 3,491 |
| Rawlins County | 101 | -7.38% | 2,384 | 2,574 |
| Kingman County | 102 | -8.34% | 6,801 | 7,420 |
| Lane County | 103 | -8.85% | 1,431 | 1,570 |
| Greeley County | 104 | -11.37% | 1,130 | 1,275 |
| Morton County | 105 | -12.02% | 2,378 | 2,703 |
Kansas's counties show varied growth patterns from 2020 to 2025. Pottawatomie County leads with 7.18% annualized growth, followed by Miami County (5.62%) and Johnson County (4.57%). The largest counties are Johnson County (639,108), Sedgwick County (541,908), and Shawnee County (178,288). Of the 105 counties in Kansas, 33 are growing while 72 have experienced population decline. Overall, counties averaged -1.42% annualized growth, with total population growing by 1.75% annually.
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