Ranking of Kentucky Counties By Population Aged 25 years and above with an Educational attainment of Less than High School Diploma in 2021 (ACS-5Yrs)
Updated on September 3, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, the population of Kentucky (aged 25 years and above) who had an educational attainment of Less than High School Diploma was 376,963. Among all Kentucky counties, Jefferson County had the highest population (aged 25 years and above) with an educational attainment of Less than High School Diploma (47,255), followed by Fayette County (15,977), and Warren County (9,887).
The chart below shows the top 10 Kentucky counties, and the table below shows the ranking of all Kentucky counties.
You can see similar information for other educational attainments.
You can also see similar information for other states and for the United States.
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Related Topics: Kentucky ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census - ACS 5-Year Estimates.
Ranking of Kentucky Counties By Population (Aged 25yrs+) with an Educational Attainment of Less than High School Diploma in 2021
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| Rank | County | Number of People |
|---|---|---|
| 1 | Jefferson County | 47255 |
| 2 | Fayette County | 15977 |
| 3 | Warren County | 9887 |
| 4 | Kenton County | 9698 |
| 5 | Pike County | 8852 |
| 6 | Pulaski County | 7540 |
| 7 | Laurel County | 7501 |
| 8 | Daviess County | 6247 |
| 9 | Bullitt County | 6060 |
| 10 | Boone County | 6052 |
| 11 | Madison County | 5871 |
| 12 | Hardin County | 5821 |
| 13 | Floyd County | 5794 |
| 14 | Christian County | 5672 |
| 15 | Knox County | 4887 |
| 16 | Barren County | 4803 |
| 17 | Harlan County | 4738 |
| 18 | Clay County | 4658 |
| 19 | Campbell County | 4486 |
| 20 | Perry County | 4388 |
| 21 | Bell County | 4264 |
| 22 | Shelby County | 4232 |
| 23 | Boyd County | 4064 |
| 24 | Whitley County | 4053 |
| 25 | Hopkins County | 3896 |
| 26 | Carter County | 3752 |
| 27 | Muhlenberg County | 3670 |
| 28 | Jessamine County | 3626 |
| 29 | Henderson County | 3609 |
| 30 | Letcher County | 3587 |
| 31 | McCracken County | 3582 |
| 32 | Franklin County | 3404 |
| 33 | Wayne County | 3204 |
| 34 | Ohio County | 3061 |
| 35 | Grayson County | 3001 |
| 36 | Knott County | 2981 |
| 37 | Lincoln County | 2962 |
| 38 | Hart County | 2829 |
| 39 | Casey County | 2813 |
| 40 | Montgomery County | 2788 |
| 41 | Clark County | 2787 |
| 42 | Oldham County | 2728 |
| 43 | Johnson County | 2716 |
| 44 | Lawrence County | 2673 |
| 45 | Jackson County | 2628 |
| 46 | Graves County | 2607 |
| 47 | McCreary County | 2602 |
| 48 | Estill County | 2597 |
| 49 | Greenup County | 2516 |
| 50 | Nelson County | 2507 |
| 51 | Scott County | 2370 |
| 52 | Morgan County | 2351 |
| 53 | Logan County | 2332 |
| 54 | Magoffin County | 2313 |
| 55 | Calloway County | 2275 |
| 56 | Rockcastle County | 2250 |
| 57 | Russell County | 2237 |
| 58 | Meade County | 2208 |
| 59 | Breathitt County | 2203 |
| 60 | Martin County | 2189 |
| 61 | Taylor County | 2187 |
| 62 | Boyle County | 2098 |
| 63 | Lewis County | 2091 |
| 64 | Larue County | 2017 |
| 65 | Allen County | 1999 |
| 66 | Bourbon County | 1980 |
| 67 | Marion County | 1961 |
| 68 | Breckinridge County | 1952 |
| 69 | Harrison County | 1946 |
| 70 | Fleming County | 1896 |
| 71 | Marshall County | 1891 |
| 72 | Rowan County | 1880 |
| 73 | Grant County | 1868 |
| 74 | Adair County | 1866 |
| 75 | Mercer County | 1858 |
| 76 | Garrard County | 1779 |
| 77 | Edmonson County | 1687 |
| 78 | Henry County | 1682 |
| 79 | Pendleton County | 1667 |
| 80 | Butler County | 1664 |
| 81 | Todd County | 1660 |
| 82 | Mason County | 1646 |
| 83 | Powell County | 1599 |
| 84 | Wolfe County | 1549 |
| 85 | Green County | 1535 |
| 86 | Woodford County | 1515 |
| 87 | Bath County | 1512 |
| 88 | Monroe County | 1502 |
| 89 | Clinton County | 1466 |
| 90 | Anderson County | 1442 |
| 91 | Lee County | 1441 |
| 92 | Carroll County | 1371 |
| 93 | Elliott County | 1369 |
| 94 | Simpson County | 1364 |
| 95 | Owen County | 1332 |
| 96 | Metcalfe County | 1316 |
| 97 | Webster County | 1310 |
| 98 | Leslie County | 1219 |
| 99 | Caldwell County | 1160 |
| 100 | Trigg County | 1108 |
| 101 | Washington County | 1102 |
| 102 | Spencer County | 1057 |
| 103 | Menifee County | 1011 |
| 104 | Nicholas County | 979 |
| 105 | Trimble County | 975 |
| 106 | Owsley County | 939 |
| 107 | Fulton County | 909 |
| 108 | Crittenden County | 906 |
| 109 | Livingston County | 894 |
| 110 | Cumberland County | 886 |
| 111 | Hancock County | 884 |
| 112 | Gallatin County | 874 |
| 113 | Union County | 799 |
| 114 | Lyon County | 738 |
| 115 | Bracken County | 642 |
| 116 | McLean County | 640 |
| 117 | Ballard County | 599 |
| 118 | Carlisle County | 488 |
| 119 | Hickman County | 366 |
| 120 | Robertson County | 236 |