| County | Rank | Change (2020) ↓ | 2026 Pop. | 2020 Pop. |
|---|---|---|---|---|
| Stone County | 1 | 12.93% | 20,699 | 18,329 |
| Lafayette County | 2 | 8.61% | 60,729 | 55,916 |
| George County | 3 | 8.6% | 26,462 | 24,367 |
| Pearl River County | 4 | 7.98% | 60,694 | 56,207 |
| DeSoto County | 5 | 7.29% | 199,691 | 186,129 |
| Madison County | 6 | 6.73% | 116,605 | 109,252 |
| Lamar County | 7 | 5.27% | 67,788 | 64,393 |
| Harrison County | 8 | 4.58% | 218,402 | 208,835 |
| Pontotoc County | 9 | 4.25% | 32,520 | 31,195 |
| Jackson County | 10 | 3.7% | 148,676 | 143,378 |
| Prentiss County | 11 | 3.5% | 25,847 | 24,974 |
| Marshall County | 12 | 2.9% | 34,762 | 33,783 |
| Tate County | 13 | 2.69% | 28,875 | 28,119 |
| Rankin County | 14 | 2.66% | 161,351 | 157,175 |
| Union County | 15 | 2.61% | 28,539 | 27,814 |
| Webster County | 16 | 2.37% | 10,139 | 9,904 |
| Hancock County | 17 | 2.22% | 47,154 | 46,130 |
| Leake County | 18 | 2.18% | 21,714 | 21,250 |
| Itawamba County | 19 | 1.89% | 24,316 | 23,865 |
| Greene County | 20 | 1.82% | 13,775 | 13,529 |
| Yalobusha County | 21 | 1.61% | 12,636 | 12,436 |
| Oktibbeha County | 22 | 1.45% | 52,453 | 51,705 |
| Lincoln County | 23 | 1.13% | 35,238 | 34,844 |
| Benton County | 24 | 0.61% | 7,716 | 7,669 |
| Neshoba County | 25 | 0.34% | 29,103 | 29,003 |
| Forrest County | 26 | 0.29% | 78,441 | 78,212 |
| Issaquena County | 27 | 0% | 1,325 | 1,325 |
| Lee County | 28 | -0.08% | 83,250 | 83,319 |
| Walthall County | 29 | -0.19% | 13,847 | 13,873 |
| Wayne County | 30 | -0.23% | 19,761 | 19,807 |
| Alcorn County | 31 | -0.4% | 34,592 | 34,732 |
| Panola County | 32 | -0.54% | 32,990 | 33,170 |
| Newton County | 33 | -0.69% | 21,107 | 21,254 |
| Scott County | 34 | -0.78% | 27,760 | 27,977 |
| Jefferson Davis County | 35 | -0.81% | 11,183 | 11,274 |
| Perry County | 36 | -0.93% | 11,352 | 11,459 |
| Choctaw County | 37 | -0.95% | 8,129 | 8,207 |
| Tippah County | 38 | -1.02% | 21,515 | 21,737 |
| Tishomingo County | 39 | -1.29% | 18,611 | 18,854 |
| Simpson County | 40 | -1.56% | 25,485 | 25,890 |
| Covington County | 41 | -1.62% | 18,005 | 18,301 |
| Smith County | 42 | -1.89% | 13,937 | 14,205 |
| Winston County | 43 | -2.17% | 17,302 | 17,686 |
| Amite County | 44 | -2.34% | 12,405 | 12,702 |
| Marion County | 45 | -2.54% | 23,758 | 24,376 |
| Chickasaw County | 46 | -2.56% | 16,646 | 17,083 |
| Clay County | 47 | -2.75% | 18,109 | 18,621 |
| Monroe County | 48 | -2.81% | 33,177 | 34,135 |
| Jones County | 49 | -2.89% | 65,229 | 67,173 |
| Lowndes County | 50 | -3.22% | 56,892 | 58,783 |
| Lawrence County | 51 | -3.37% | 11,580 | 11,984 |
| Clarke County | 52 | -3.61% | 14,985 | 15,547 |
| Calhoun County | 53 | -3.68% | 12,730 | 13,216 |
| Lauderdale County | 54 | -3.73% | 69,962 | 72,676 |
| Adams County | 55 | -3.78% | 28,314 | 29,427 |
| Copiah County | 56 | -4.02% | 27,134 | 28,271 |
| Pike County | 57 | -4.47% | 38,398 | 40,193 |
| Grenada County | 58 | -4.59% | 20,587 | 21,577 |
| Attala County | 59 | -4.73% | 16,974 | 17,817 |
| Franklin County | 60 | -4.76% | 7,296 | 7,661 |
| Jasper County | 61 | -5.47% | 15,457 | 16,352 |
| Kemper County | 62 | -5.76% | 8,446 | 8,962 |
| Noxubee County | 63 | -6.13% | 9,599 | 10,226 |
| Warren County | 64 | -6.47% | 41,669 | 44,550 |
| Coahoma County | 65 | -6.68% | 19,809 | 21,228 |
| Jefferson County | 66 | -6.8% | 6,752 | 7,245 |
| Montgomery County | 67 | -7.05% | 9,103 | 9,793 |
| Carroll County | 68 | -8.75% | 9,070 | 9,940 |
| Hinds County | 69 | -8.77% | 206,891 | 226,772 |
| Humphreys County | 70 | -10.42% | 6,929 | 7,735 |
| Tunica County | 71 | -10.51% | 8,711 | 9,734 |
| Leflore County | 72 | -10.8% | 25,281 | 28,341 |
| Bolivar County | 73 | -10.89% | 27,485 | 30,843 |
| Washington County | 74 | -10.99% | 39,739 | 44,648 |
| Holmes County | 75 | -11.07% | 15,008 | 16,876 |
| Quitman County | 76 | -11.56% | 5,442 | 6,153 |
| Wilkinson County | 77 | -12.2% | 7,484 | 8,524 |
| Claiborne County | 78 | -17.37% | 7,516 | 9,096 |
| Sunflower County | 79 | -17.49% | 21,207 | 25,702 |
| Sharkey County | 80 | -21.94% | 2,946 | 3,774 |
| Tallahatchie County | 81 | -23.07% | 9,729 | 12,647 |
| Yazoo County | 82 | -25.51% | 19,866 | 26,670 |
Mississippi's counties show varied growth patterns from 2020 to 2026. Stone County leads with 2.05% annualized growth, followed by Lafayette County (1.39%) and George County (1.38%). The largest counties are Harrison County (218,402), Hinds County (206,891), and DeSoto County (199,691). Of the 82 counties in Mississippi, 27 are growing while 55 have experienced population decline. Overall, counties averaged -0.51% annualized growth, with total population growing by -0.09% annually.
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