Ranking of Tennessee 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 Tennessee (aged 25 years and above) who had an educational attainment of Less than High School Diploma was 529,162. Among all Tennessee counties, Shelby County had the highest population (aged 25 years and above) with an educational attainment of Less than High School Diploma (65,515), followed by Davidson County (48,693), and Knox County (25,090).
The chart below shows the top 10 Tennessee counties, and the table below shows the ranking of all Tennessee 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: Tennessee ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census - ACS 5-Year Estimates.
Ranking of Tennessee 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 | Shelby County | 65515 |
| 2 | Davidson County | 48693 |
| 3 | Knox County | 25090 |
| 4 | Hamilton County | 24402 |
| 5 | Rutherford County | 16271 |
| 6 | Sullivan County | 13485 |
| 7 | Sumner County | 12381 |
| 8 | Blount County | 9860 |
| 9 | Sevier County | 9440 |
| 10 | Bradley County | 9289 |
| 11 | Montgomery County | 8634 |
| 12 | Washington County | 8522 |
| 13 | Greene County | 7556 |
| 14 | Wilson County | 6965 |
| 15 | Madison County | 6926 |
| 16 | Hamblen County | 6708 |
| 17 | Williamson County | 6688 |
| 18 | Maury County | 6113 |
| 19 | Robertson County | 6029 |
| 20 | Putnam County | 5689 |
| 21 | Campbell County | 5663 |
| 22 | Carter County | 5551 |
| 23 | Anderson County | 5550 |
| 24 | Hawkins County | 5548 |
| 25 | Bedford County | 5350 |
| 26 | Cumberland County | 5298 |
| 27 | Jefferson County | 5288 |
| 28 | McMinn County | 5248 |
| 29 | Loudon County | 5092 |
| 30 | Monroe County | 5049 |
| 31 | Dickson County | 4812 |
| 32 | Coffee County | 4751 |
| 33 | Warren County | 4697 |
| 34 | Tipton County | 4574 |
| 35 | Gibson County | 4420 |
| 36 | Cocke County | 4217 |
| 37 | Claiborne County | 4124 |
| 38 | Lawrence County | 4113 |
| 39 | Marion County | 3797 |
| 40 | Rhea County | 3761 |
| 41 | Roane County | 3678 |
| 42 | Obion County | 3677 |
| 43 | Cheatham County | 3669 |
| 44 | White County | 3556 |
| 45 | Lauderdale County | 3550 |
| 46 | Lincoln County | 3509 |
| 47 | Grainger County | 3402 |
| 48 | Macon County | 3354 |
| 49 | Henry County | 3339 |
| 50 | Fayette County | 3307 |
| 51 | Hardeman County | 3302 |
| 52 | Franklin County | 3300 |
| 53 | Hickman County | 3217 |
| 54 | Dyer County | 3030 |
| 55 | Hardin County | 3002 |
| 56 | Scott County | 2989 |
| 57 | Overton County | 2945 |
| 58 | Morgan County | 2896 |
| 59 | Union County | 2886 |
| 60 | Marshall County | 2835 |
| 61 | DeKalb County | 2763 |
| 62 | Bledsoe County | 2744 |
| 63 | Weakley County | 2740 |
| 64 | McNairy County | 2719 |
| 65 | Giles County | 2638 |
| 66 | Fentress County | 2607 |
| 67 | Johnson County | 2588 |
| 68 | Henderson County | 2557 |
| 69 | Carroll County | 2335 |
| 70 | Polk County | 2278 |
| 71 | Wayne County | 2172 |
| 72 | Haywood County | 2153 |
| 73 | Grundy County | 2078 |
| 74 | Sequatchie County | 2057 |
| 75 | Unicoi County | 1856 |
| 76 | Humphreys County | 1823 |
| 77 | Smith County | 1771 |
| 78 | Benton County | 1743 |
| 79 | Chester County | 1736 |
| 80 | Jackson County | 1625 |
| 81 | Cannon County | 1585 |
| 82 | Meigs County | 1553 |
| 83 | Crockett County | 1500 |
| 84 | Lewis County | 1437 |
| 85 | Lake County | 1432 |
| 86 | Decatur County | 1294 |
| 87 | Perry County | 1289 |
| 88 | Stewart County | 1276 |
| 89 | Trousdale County | 1131 |
| 90 | Clay County | 996 |
| 91 | Houston County | 915 |
| 92 | Hancock County | 899 |
| 93 | Van Buren County | 856 |
| 94 | Pickett County | 789 |
| 95 | Moore County | 625 |