| County | Rank | Change (2020) ↓ | 2025 Pop. | 2020 Pop. |
|---|---|---|---|---|
| Lincoln County | 1 | 12.05% | 67,069 | 59,857 |
| Warren County | 2 | 9.52% | 39,141 | 35,740 |
| Christian County | 3 | 9.33% | 97,621 | 89,294 |
| Webster County | 4 | 9.21% | 42,601 | 39,008 |
| Morgan County | 5 | 8.73% | 22,835 | 21,001 |
| Cedar County | 6 | 7.92% | 15,340 | 14,214 |
| Wright County | 7 | 7.81% | 19,637 | 18,214 |
| Ozark County | 8 | 7.81% | 9,184 | 8,519 |
| Cass County | 9 | 7.29% | 116,051 | 108,162 |
| Platte County | 10 | 6.63% | 114,302 | 107,190 |
| Douglas County | 11 | 6.52% | 12,356 | 11,600 |
| St. Clair County | 12 | 6.49% | 9,953 | 9,346 |
| Benton County | 13 | 6.4% | 20,668 | 19,425 |
| Hickory County | 14 | 6.25% | 8,817 | 8,298 |
| Texas County | 15 | 6.17% | 25,824 | 24,323 |
| Newton County | 16 | 6.01% | 62,225 | 58,699 |
| St. Charles County | 17 | 5.68% | 429,494 | 406,423 |
| Boone County | 18 | 5.5% | 194,170 | 184,050 |
| Polk County | 19 | 5.4% | 33,322 | 31,616 |
| Livingston County | 20 | 5.23% | 14,721 | 13,990 |
| Clay County | 21 | 4.9% | 266,590 | 254,145 |
| Dallas County | 22 | 4.84% | 17,961 | 17,132 |
| Johnson County | 23 | 4.84% | 56,653 | 54,039 |
| Stone County | 24 | 4.41% | 32,580 | 31,205 |
| Monroe County | 25 | 4.1% | 9,049 | 8,693 |
| Cooper County | 26 | 4.03% | 17,318 | 16,647 |
| Jasper County | 27 | 4.02% | 127,841 | 122,896 |
| Barry County | 28 | 4.01% | 35,926 | 34,542 |
| Miller County | 29 | 4% | 25,770 | 24,778 |
| Greene County | 30 | 3.82% | 310,754 | 299,332 |
| Lawrence County | 31 | 3.75% | 39,423 | 37,998 |
| Shannon County | 32 | 3.71% | 7,296 | 7,035 |
| Carter County | 33 | 3.54% | 5,389 | 5,205 |
| Pike County | 34 | 3.34% | 17,995 | 17,413 |
| Henry County | 35 | 3.23% | 22,693 | 21,982 |
| Adair County | 36 | 3.23% | 26,089 | 25,272 |
| Camden County | 37 | 3.19% | 44,171 | 42,807 |
| Bates County | 38 | 3.17% | 16,562 | 16,053 |
| Clinton County | 39 | 3.09% | 21,873 | 21,218 |
| McDonald County | 40 | 3.06% | 23,991 | 23,278 |
| Franklin County | 41 | 3.05% | 108,068 | 104,867 |
| Cape Girardeau County | 42 | 2.91% | 84,206 | 81,824 |
| Phelps County | 43 | 2.82% | 45,827 | 44,568 |
| Dent County | 44 | 2.77% | 14,788 | 14,389 |
| Montgomery County | 45 | 2.71% | 11,592 | 11,286 |
| Madison County | 46 | 2.69% | 12,965 | 12,625 |
| Howell County | 47 | 2.54% | 40,817 | 39,806 |
| Jefferson County | 48 | 2.5% | 232,621 | 226,947 |
| Callaway County | 49 | 2.45% | 45,434 | 44,346 |
| Gentry County | 50 | 2.43% | 6,285 | 6,136 |
| Jackson County | 51 | 2.34% | 734,441 | 717,662 |
| Caldwell County | 52 | 2.3% | 9,024 | 8,821 |
| Pettis County | 53 | 2.3% | 43,991 | 43,004 |
| St. Francois County | 54 | 2.21% | 67,912 | 66,446 |
| Lafayette County | 55 | 2.2% | 33,778 | 33,050 |
| Laclede County | 56 | 2.1% | 36,802 | 36,046 |
| Cole County | 57 | 1.71% | 77,932 | 76,624 |
| Osage County | 58 | 1.67% | 13,477 | 13,255 |
| Perry County | 59 | 1.47% | 19,250 | 18,971 |
| Maries County | 60 | 1.42% | 8,571 | 8,451 |
| Ralls County | 61 | 1.38% | 10,497 | 10,354 |
| Schuyler County | 62 | 1.37% | 4,065 | 4,010 |
| Linn County | 63 | 1.31% | 12,012 | 11,857 |
| Bollinger County | 64 | 1.22% | 10,684 | 10,555 |
| Taney County | 65 | 1.13% | 56,698 | 56,064 |
| Daviess County | 66 | 1.13% | 8,528 | 8,433 |
| Moniteau County | 67 | 0.83% | 15,343 | 15,216 |
| Washington County | 68 | 0.82% | 23,624 | 23,432 |
| Oregon County | 69 | 0.79% | 8,679 | 8,611 |
| Vernon County | 70 | 0.67% | 19,806 | 19,675 |
| Holt County | 71 | 0.6% | 4,216 | 4,191 |
| Barton County | 72 | 0.59% | 11,691 | 11,623 |
| Saline County | 73 | 0.42% | 23,438 | 23,339 |
| Ray County | 74 | 0.37% | 23,220 | 23,135 |
| Howard County | 75 | 0.27% | 10,184 | 10,157 |
| Marion County | 76 | 0.16% | 28,538 | 28,493 |
| Knox County | 77 | 0.13% | 3,744 | 3,739 |
| Pulaski County | 78 | 0.11% | 54,099 | 54,039 |
| Chariton County | 79 | 0.01% | 7,391 | 7,390 |
| Harrison County | 80 | -0.01% | 8,156 | 8,157 |
| Carroll County | 81 | -0.04% | 8,461 | 8,464 |
| Scott County | 82 | -0.08% | 37,991 | 38,022 |
| Macon County | 83 | -0.12% | 15,181 | 15,199 |
| Ste. Genevieve County | 84 | -0.14% | 18,452 | 18,478 |
| Scotland County | 85 | -0.15% | 4,698 | 4,705 |
| Andrew County | 86 | -0.16% | 18,073 | 18,102 |
| Grundy County | 87 | -0.33% | 9,725 | 9,757 |
| Ripley County | 88 | -0.46% | 10,621 | 10,670 |
| Crawford County | 89 | -0.48% | 22,925 | 23,036 |
| Stoddard County | 90 | -0.51% | 28,504 | 28,650 |
| Buchanan County | 91 | -0.62% | 83,947 | 84,472 |
| Dade County | 92 | -0.8% | 7,525 | 7,586 |
| Butler County | 93 | -0.82% | 41,718 | 42,063 |
| St. Louis County | 94 | -0.84% | 994,983 | 1,003,376 |
| Clark County | 95 | -0.9% | 6,598 | 6,658 |
| Wayne County | 96 | -1.1% | 10,815 | 10,935 |
| Gasconade County | 97 | -1.25% | 14,579 | 14,763 |
| Iron County | 98 | -1.34% | 9,386 | 9,513 |
| Randolph County | 99 | -1.67% | 24,049 | 24,457 |
| Lewis County | 100 | -1.74% | 9,864 | 10,039 |
| Audrain County | 101 | -2.08% | 24,266 | 24,781 |
| Atchison County | 102 | -2.7% | 5,162 | 5,305 |
| Shelby County | 103 | -2.84% | 5,922 | 6,095 |
| Mercer County | 104 | -3.05% | 3,405 | 3,512 |
| Reynolds County | 105 | -3.13% | 5,889 | 6,079 |
| Nodaway County | 106 | -3.27% | 20,313 | 20,999 |
| Mississippi County | 107 | -3.9% | 11,648 | 12,121 |
| Dunklin County | 108 | -4.53% | 26,938 | 28,216 |
| Putnam County | 109 | -5.25% | 4,439 | 4,685 |
| Sullivan County | 110 | -5.3% | 5,659 | 5,976 |
| Worth County | 111 | -6.45% | 1,841 | 1,968 |
| St. Louis city | 112 | -7.89% | 276,618 | 300,315 |
| New Madrid County | 113 | -7.92% | 15,036 | 16,329 |
| Pemiscot County | 114 | -9.26% | 14,145 | 15,589 |
| DeKalb County | 115 | -14.89% | 9,869 | 11,596 |
Missouri's counties show varied growth patterns from 2020 to 2025. Lincoln County leads with 12.05% annualized growth, followed by Warren County (9.52%) and Christian County (9.33%). The largest counties are St. Louis County (994,983), Jackson County (734,441), and St. Charles County (429,494). Of the 115 counties in Missouri, 79 are growing while 36 have experienced population decline. Overall, counties averaged 1.62% annualized growth, with total population growing by 2.08% annually.
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