This is a 1.4 percent rise in Knox County’s population, from 480,126 in 2020 to 486,677 in 2021.
Knox County had the third largest population in Tennessee in 2021.
The US Census Bureau found more than 73 percent of counties in the US saw a natural decrease in population in 2021. This is up from a 55.5 percent increase in 2020.
The Midwest suffered the most sustained population decreases, with many counties along the US East Coast and through the Rocky Mountains seeing increases.
The US population continues to grow, though at a slower rate than before.
Tennessee Counties By Population Change from 2020 to 2021
| County | 2020 Estimated Population | 2021 Estimated Population | % Change in Population From Year to Year |
|---|---|---|---|
| Sequatchie County | 15,863 | 16,396 | 3.4% |
| Montgomery County | 221,160 | 227,900 | 3% |
| Maury County | 101,700 | 104,760 | 3% |
| Loudon County | 55,097 | 56,690 | 2.9% |
| Rutherford County | 343,128 | 352,182 | 2.6% |
| Williamson County | 249,424 | 255,735 | 2.5% |
| Hancock County | 6,622 | 6,787 | 2.5% |
| Van Buren County | 6,171 | 6,324 | 2.5% |
| Wilson County | 148,564 | 151,917 | 2.3% |
| Lake County | 6,980 | 7,128 | 2.1% |
| Meigs County | 12,785 | 13,049 | 2.1% |
| Bledsoe County | 14,930 | 15,234 | 2% |
| Lewis County | 12,602 | 12,857 | 2% |
| Cumberland County | 61,272 | 62,451 | 1.9% |
| Macon County | 25,243 | 25,699 | 1.8% |
| Fentress County | 18,522 | 18,850 | 1.8% |
| Robertson County | 72,860 | 74,098 | 1.7% |
| Pickett County | 4,995 | 5,079 | 1.7% |
| Sumner County | 197,272 | 200,557 | 1.7% |
| Fayette County | 42,139 | 42,832 | 1.6% |
| Bedford County | 50,302 | 51,119 | 1.6% |
| Coffee County | 58,102 | 59,032 | 1.6% |
| Dickson County | 54,432 | 55,292 | 1.6% |
| Marshall County | 34,441 | 34,984 | 1.6% |
| DeKalb County | 20,171 | 20,478 | 1.5% |
| Putnam County | 79,982 | 81,188 | 1.5% |
| Blount County | 135,566 | 137,605 | 1.5% |
| Hickman County | 24,942 | 25,307 | 1.5% |
| Lawrence County | 44,189 | 44,828 | 1.4% |
| McMinn County | 53,315 | 54,059 | 1.4% |
| Jefferson County | 54,870 | 55,624 | 1.4% |
| Knox County | 480,126 | 486,677 | 1.4% |
| Perry County | 8,360 | 8,472 | 1.3% |
| Bradley County | 108,741 | 110,162 | 1.3% |
| Wayne County | 16,202 | 16,409 | 1.3% |
| Stewart County | 13,683 | 13,855 | 1.3% |
| Humphreys County | 18,974 | 19,211 | 1.2% |
| Warren County | 41,023 | 41,523 | 1.2% |
| Polk County | 17,569 | 17,776 | 1.2% |
| Smith County | 19,939 | 20,172 | 1.2% |
| Jackson County | 11,617 | 11,750 | 1.1% |
| Johnson County | 17,966 | 18,170 | 1.1% |
| Morgan County | 21,020 | 21,254 | 1.1% |
| Overton County | 22,588 | 22,839 | 1.1% |
| Union County | 19,820 | 20,040 | 1.1% |
| Cocke County | 36,022 | 36,418 | 1.1% |
| Hawkins County | 56,669 | 57,288 | 1.1% |
| Cheatham County | 41,087 | 41,523 | 1.1% |
| Sevier County | 98,497 | 99,517 | 1% |
| Franklin County | 42,781 | 43,215 | 1% |
| Grainger County | 23,525 | 23,763 | 1% |
| Chester County | 17,347 | 17,504 | 0.9% |
| Roane County | 53,513 | 53,992 | 0.9% |
| Washington County | 133,080 | 134,236 | 0.9% |
| White County | 27,424 | 27,650 | 0.8% |
| Giles County | 30,295 | 30,542 | 0.8% |
| Campbell County | 39,277 | 39,578 | 0.8% |
| Sullivan County | 158,092 | 159,265 | 0.7% |
| Claiborne County | 32,038 | 32,267 | 0.7% |
| Rhea County | 32,903 | 33,136 | 0.7% |
| Crockett County | 13,884 | 13,979 | 0.7% |
| Monroe County | 46,384 | 46,698 | 0.7% |
| Grundy County | 13,531 | 13,622 | 0.7% |
| Hamilton County | 366,991 | 369,135 | 0.6% |
| Greene County | 70,220 | 70,621 | 0.6% |
| Weakley County | 32,864 | 33,036 | 0.5% |
| Henderson County | 27,818 | 27,953 | 0.5% |
| Anderson County | 77,209 | 77,576 | 0.5% |
| Houston County | 8,285 | 8,317 | 0.4% |
| Henry County | 32,115 | 32,239 | 0.4% |
| Benton County | 15,812 | 15,872 | 0.4% |
| Lincoln County | 35,309 | 35,433 | 0.4% |
| Scott County | 21,842 | 21,917 | 0.3% |
| Hardin County | 26,800 | 26,892 | 0.3% |
| Gibson County | 50,375 | 50,541 | 0.3% |
| Marion County | 28,834 | 28,877 | 0.1% |
| McNairy County | 25,839 | 25,860 | 0.1% |
| Tipton County | 60,961 | 61,004 | 0.1% |
| Hardeman County | 25,410 | 25,426 | 0.1% |
| Carroll County | 28,415 | 28,432 | 0.1% |
| Cannon County | 14,547 | 14,553 | 0% |
| Lauderdale County | 25,100 | 25,108 | 0% |
| Clay County | 7,554 | 7,555 | 0% |
| Madison County | 98,777 | 98,775 | 0% |
| Dyer County | 36,646 | 36,615 | -0.1% |
| Decatur County | 11,402 | 11,391 | -0.1% |
| Carter County | 56,315 | 56,134 | -0.3% |
| Shelby County | 928,644 | 924,454 | -0.5% |
| Haywood County | 17,795 | 17,694 | -0.6% |
| Obion County | 30,716 | 30,466 | -0.8% |
| Unicoi County | 17,867 | 17,698 | -0.9% |
| Davidson County | 715,486 | 703,953 | -1.6% |
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