Ranking of Kentucky Counties By Population in 2021
Updated on June 21, 2025.
Based on the US Census Vintage data estimates, in 2021, the Population for Kentucky was 4.51M. Among all Kentucky counties, Jefferson County had the highest population (777.62K), followed by Fayette County (320.43K), and Kenton County (169.64K).
The chart below shows the top 10 counties, and the table below shows the ranking of all Kentucky counties.
You can see similar ranking information for related topics, and for other states. You can also see the ranking of all counties in the United States.
Related Topics: Kentucky Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage), 2021 Census.
See this for other years:
Ranking of Kentucky Counties By Population in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Jefferson County | 777624 |
| 2 | Fayette County | 320431 |
| 3 | Kenton County | 169641 |
| 4 | Boone County | 137707 |
| 5 | Warren County | 137191 |
| 6 | Hardin County | 111870 |
| 7 | Daviess County | 103087 |
| 8 | Madison County | 93453 |
| 9 | Campbell County | 92824 |
| 10 | Bullitt County | 83068 |
| 11 | Christian County | 73144 |
| 12 | Oldham County | 68251 |
| 13 | McCracken County | 67554 |
| 14 | Pulaski County | 65538 |
| 15 | Laurel County | 62582 |
| 16 | Scott County | 58431 |
| 17 | Pike County | 57434 |
| 18 | Jessamine County | 53583 |
| 19 | Franklin County | 51721 |
| 20 | Shelby County | 48600 |
| 21 | Boyd County | 47754 |
| 22 | Nelson County | 47135 |
| 23 | Hopkins County | 45149 |
| 24 | Barren County | 44588 |
| 25 | Henderson County | 44409 |
| 26 | Calloway County | 37904 |
| 27 | Clark County | 36892 |
| 28 | Whitley County | 36805 |
| 29 | Graves County | 36665 |
| 30 | Greenup County | 35660 |
| 31 | Floyd County | 35298 |
| 32 | Marshall County | 31810 |
| 33 | Boyle County | 30600 |
| 34 | Muhlenberg County | 30334 |
| 35 | Meade County | 30125 |
| 36 | Knox County | 30028 |
| 37 | Montgomery County | 28218 |
| 38 | Perry County | 27929 |
| 39 | Logan County | 27807 |
| 40 | Woodford County | 27089 |
| 41 | Grayson County | 26582 |
| 42 | Carter County | 26438 |
| 43 | Taylor County | 26179 |
| 44 | Harlan County | 26139 |
| 45 | Grant County | 25293 |
| 46 | Rowan County | 24565 |
| 47 | Lincoln County | 24232 |
| 48 | Anderson County | 24093 |
| 49 | Bell County | 23788 |
| 50 | Ohio County | 23729 |
| 51 | Mercer County | 22859 |
| 52 | Johnson County | 22550 |
| 53 | Letcher County | 21229 |
| 54 | Allen County | 20833 |
| 55 | Breckinridge County | 20679 |
| 56 | Bourbon County | 20220 |
| 57 | Clay County | 20162 |
| 58 | Spencer County | 19879 |
| 59 | Simpson County | 19734 |
| 60 | Marion County | 19728 |
| 61 | Wayne County | 19543 |
| 62 | Hart County | 19476 |
| 63 | Harrison County | 18961 |
| 64 | Adair County | 18928 |
| 65 | Russell County | 18166 |
| 66 | Garrard County | 17368 |
| 67 | Mason County | 16952 |
| 68 | McCreary County | 16800 |
| 69 | Lawrence County | 16273 |
| 70 | Rockcastle County | 16141 |
| 71 | Casey County | 15922 |
| 72 | Henry County | 15707 |
| 73 | Fleming County | 15262 |
| 74 | Larue County | 15035 |
| 75 | Pendleton County | 14632 |
| 76 | Trigg County | 14225 |
| 77 | Estill County | 14083 |
| 78 | Knott County | 14040 |
| 79 | Morgan County | 13691 |
| 80 | Breathitt County | 13558 |
| 81 | Union County | 13251 |
| 82 | Powell County | 13095 |
| 83 | Lewis County | 12982 |
| 84 | Jackson County | 12975 |
| 85 | Webster County | 12858 |
| 86 | Bath County | 12797 |
| 87 | Caldwell County | 12682 |
| 88 | Butler County | 12297 |
| 89 | Todd County | 12296 |
| 90 | Edmonson County | 12228 |
| 91 | Washington County | 12076 |
| 92 | Magoffin County | 11490 |
| 93 | Green County | 11328 |
| 94 | Owen County | 11301 |
| 95 | Monroe County | 11263 |
| 96 | Martin County | 11165 |
| 97 | Carroll County | 10899 |
| 98 | Metcalfe County | 10387 |
| 99 | Leslie County | 10284 |
| 100 | Clinton County | 9281 |
| 101 | McLean County | 9121 |
| 102 | Hancock County | 9076 |
| 103 | Livingston County | 8981 |
| 104 | Crittenden County | 8944 |
| 105 | Gallatin County | 8756 |
| 106 | Trimble County | 8553 |
| 107 | Bracken County | 8445 |
| 108 | Lyon County | 8434 |
| 109 | Nicholas County | 7733 |
| 110 | Ballard County | 7689 |
| 111 | Lee County | 7457 |
| 112 | Elliott County | 7364 |
| 113 | Wolfe County | 6507 |
| 114 | Fulton County | 6486 |
| 115 | Menifee County | 6175 |
| 116 | Cumberland County | 5902 |
| 117 | Carlisle County | 4761 |
| 118 | Hickman County | 4427 |
| 119 | Owsley County | 3971 |
| 120 | Robertson County | 2259 |
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