| County | Rank | Change (2020) ↓ | 2025 Pop. | 2020 Pop. |
|---|---|---|---|---|
| Warren County | 1 | 12.52% | 151,943 | 135,033 |
| Robertson County | 2 | 11.26% | 2,430 | 2,184 |
| Madison County | 3 | 9.22% | 101,565 | 92,990 |
| Scott County | 4 | 9.15% | 62,800 | 57,535 |
| Jessamine County | 5 | 8.41% | 57,479 | 53,019 |
| Allen County | 6 | 8.38% | 22,295 | 20,572 |
| Spencer County | 7 | 8.13% | 21,089 | 19,503 |
| Boone County | 8 | 7.53% | 146,759 | 136,476 |
| Garrard County | 9 | 7.24% | 18,192 | 16,964 |
| Nelson County | 10 | 5.67% | 49,431 | 46,779 |
| Nicholas County | 11 | 5.54% | 7,958 | 7,540 |
| Edmonson County | 12 | 5.41% | 12,804 | 12,147 |
| Todd County | 13 | 5.33% | 12,938 | 12,283 |
| Anderson County | 14 | 5.26% | 25,148 | 23,892 |
| Mercer County | 15 | 5.25% | 23,841 | 22,652 |
| Bullitt County | 16 | 5.15% | 86,604 | 82,364 |
| Shelby County | 17 | 4.92% | 50,631 | 48,255 |
| Harrison County | 18 | 4.91% | 19,641 | 18,721 |
| Calloway County | 19 | 4.86% | 39,430 | 37,601 |
| Kenton County | 20 | 4.84% | 177,476 | 169,276 |
| Henry County | 21 | 4.79% | 16,445 | 15,693 |
| Trigg County | 22 | 4.74% | 14,748 | 14,081 |
| Jackson County | 23 | 4.7% | 13,578 | 12,968 |
| Green County | 24 | 4.66% | 11,650 | 11,131 |
| Oldham County | 25 | 4.5% | 70,742 | 67,696 |
| Fleming County | 26 | 4.5% | 15,777 | 15,098 |
| Cumberland County | 27 | 4.35% | 6,114 | 5,859 |
| Simpson County | 28 | 4.32% | 20,477 | 19,629 |
| Breckinridge County | 29 | 4.3% | 21,325 | 20,445 |
| Hart County | 30 | 4.27% | 20,120 | 19,296 |
| Menifee County | 31 | 4.25% | 6,403 | 6,142 |
| Logan County | 32 | 4.12% | 28,649 | 27,515 |
| Taylor County | 33 | 4.01% | 27,036 | 25,994 |
| Woodford County | 34 | 3.82% | 27,934 | 26,907 |
| Carroll County | 35 | 3.7% | 11,236 | 10,835 |
| Pulaski County | 36 | 3.61% | 67,465 | 65,112 |
| Fayette County | 37 | 3.6% | 334,250 | 322,628 |
| Barren County | 38 | 3.54% | 46,086 | 44,511 |
| Morgan County | 39 | 3.52% | 14,215 | 13,732 |
| Lincoln County | 40 | 3.44% | 25,082 | 24,248 |
| Russell County | 41 | 3.4% | 18,608 | 17,997 |
| Grant County | 42 | 3.33% | 25,848 | 25,014 |
| Lyon County | 43 | 3.32% | 8,966 | 8,678 |
| Grayson County | 44 | 3.32% | 27,334 | 26,456 |
| Metcalfe County | 45 | 3.27% | 10,621 | 10,285 |
| Montgomery County | 46 | 3.22% | 29,011 | 28,105 |
| Boyle County | 47 | 3.03% | 31,692 | 30,761 |
| Butler County | 48 | 2.88% | 12,672 | 12,317 |
| Franklin County | 49 | 2.82% | 53,058 | 51,603 |
| Jefferson County | 50 | 2.74% | 804,381 | 782,896 |
| Clark County | 51 | 2.6% | 38,009 | 37,047 |
| Whitley County | 52 | 2.33% | 37,549 | 36,694 |
| Meade County | 53 | 2.3% | 30,718 | 30,028 |
| Owen County | 54 | 2.29% | 11,561 | 11,302 |
| Hardin County | 55 | 2.18% | 113,256 | 110,840 |
| Washington County | 56 | 2.02% | 12,281 | 12,038 |
| Bracken County | 57 | 1.83% | 8,559 | 8,405 |
| Ohio County | 58 | 1.7% | 24,147 | 23,744 |
| Bath County | 59 | 1.67% | 12,930 | 12,717 |
| Pendleton County | 60 | 1.62% | 14,884 | 14,647 |
| Adair County | 61 | 1.54% | 19,172 | 18,881 |
| Daviess County | 62 | 1.54% | 104,987 | 103,398 |
| Graves County | 63 | 1.4% | 37,042 | 36,530 |
| Marion County | 64 | 1.37% | 19,862 | 19,594 |
| Rockcastle County | 65 | 1.36% | 16,281 | 16,063 |
| Gallatin County | 66 | 1.29% | 8,787 | 8,675 |
| Trimble County | 67 | 1.22% | 8,566 | 8,463 |
| Campbell County | 68 | 1.1% | 94,157 | 93,134 |
| Laurel County | 69 | 0.99% | 63,354 | 62,735 |
| Bourbon County | 70 | 0.8% | 20,446 | 20,284 |
| Casey County | 71 | 0.55% | 16,009 | 15,921 |
| Rowan County | 72 | 0.51% | 24,847 | 24,721 |
| McLean County | 73 | 0.47% | 9,176 | 9,133 |
| Wayne County | 74 | 0.43% | 19,628 | 19,543 |
| Larue County | 75 | 0.34% | 14,928 | 14,877 |
| Marshall County | 76 | 0.2% | 31,751 | 31,688 |
| Caldwell County | 77 | 0.2% | 12,661 | 12,636 |
| Hopkins County | 78 | 0.19% | 45,451 | 45,365 |
| Carlisle County | 79 | 0.15% | 4,812 | 4,805 |
| Hancock County | 80 | -0.15% | 9,090 | 9,104 |
| Crittenden County | 81 | -0.39% | 8,968 | 9,003 |
| McCracken County | 82 | -0.42% | 67,644 | 67,926 |
| Clinton County | 83 | -0.43% | 9,188 | 9,228 |
| Mason County | 84 | -0.48% | 17,055 | 17,137 |
| Webster County | 85 | -0.51% | 12,955 | 13,022 |
| Lee County | 86 | -0.53% | 7,325 | 7,364 |
| Estill County | 87 | -0.66% | 14,067 | 14,160 |
| Boyd County | 88 | -0.88% | 47,783 | 48,206 |
| Ballard County | 89 | -0.91% | 7,644 | 7,714 |
| Henderson County | 90 | -1.01% | 44,223 | 44,673 |
| Elliott County | 91 | -1.09% | 7,255 | 7,335 |
| Muhlenberg County | 92 | -1.29% | 30,497 | 30,897 |
| Livingston County | 93 | -1.48% | 8,741 | 8,872 |
| McCreary County | 94 | -1.62% | 16,579 | 16,852 |
| Greenup County | 95 | -1.79% | 35,247 | 35,890 |
| Powell County | 96 | -1.88% | 12,853 | 13,099 |
| Knox County | 97 | -1.97% | 29,591 | 30,185 |
| Lewis County | 98 | -2.25% | 12,794 | 13,088 |
| Monroe County | 99 | -2.34% | 11,055 | 11,320 |
| Carter County | 100 | -2.53% | 25,941 | 26,614 |
| Johnson County | 101 | -2.61% | 22,057 | 22,648 |
| Christian County | 102 | -2.71% | 70,777 | 72,748 |
| Union County | 103 | -3% | 13,240 | 13,650 |
| Wolfe County | 104 | -3.03% | 6,358 | 6,557 |
| Hickman County | 105 | -3.69% | 4,363 | 4,530 |
| Clay County | 106 | -3.86% | 19,526 | 20,309 |
| Owsley County | 107 | -3.97% | 3,872 | 4,032 |
| Lawrence County | 108 | -4.17% | 15,622 | 16,302 |
| Bell County | 109 | -4.54% | 22,894 | 23,982 |
| Floyd County | 110 | -4.77% | 34,093 | 35,802 |
| Magoffin County | 111 | -4.92% | 11,034 | 11,605 |
| Fulton County | 112 | -4.99% | 6,186 | 6,511 |
| Pike County | 113 | -6.13% | 54,862 | 58,447 |
| Knott County | 114 | -6.69% | 13,216 | 14,163 |
| Perry County | 115 | -6.95% | 26,396 | 28,369 |
| Martin County | 116 | -6.98% | 10,465 | 11,250 |
| Harlan County | 117 | -7.31% | 24,802 | 26,758 |
| Letcher County | 118 | -7.47% | 19,864 | 21,468 |
| Breathitt County | 119 | -7.7% | 12,646 | 13,701 |
| Leslie County | 120 | -8.39% | 9,593 | 10,471 |
Kentucky's counties show varied growth patterns from 2020 to 2025. Warren County leads with 12.52% annualized growth, followed by Robertson County (11.26%) and Madison County (9.22%). The largest counties are Jefferson County (804,381), Fayette County (334,250), and Kenton County (177,476). Of the 120 counties in Kentucky, 79 are growing while 41 have experienced population decline. Overall, counties averaged 1.34% annualized growth, with total population growing by 2.61% annually.
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