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Population of Counties in Missouri (2024)
County | 2024 Population | Growth Since 2020 | Area (mi²) | Density (/mi²) | Location |
|---|---|---|---|---|---|
| St. Louis County | 983,327 | -1.97% | 508 | 1,936 |  |
| Jackson County | 720,902 | 0.46% | 605 | 1,192 |  |
| St. Charles County | 419,520 | 3.22% | 561 | 748 |  |
| Greene County | 306,025 | 2.24% | 675 | 453 |  |
| St. Louis city | 277,315 | -7.71% | 62 | 4,473 |  |
| Clay County | 262,614 | 3.34% | 398 | 660 |  |
| Jefferson County | 233,240 | 2.78% | 656 | 356 |  |
| Boone County | 191,205 | 3.89% | 686 | 279 |  |
| Jasper County | 126,096 | 2.59% | 639 | 197 |  |
| Platte County | 113,310 | 5.71% | 420 | 270 |  |
| Cass County | 113,107 | 4.57% | 697 | 162 |  |
| Franklin County | 107,015 | 2.05% | 923 | 116 |  |
| Christian County | 95,722 | 7.21% | 563 | 170 |  |
| Cape Girardeau County | 83,037 | 1.49% | 579 | 143 |  |
| Buchanan County | 83,021 | -1.71% | 408 | 203 |  |
| Cole County | 77,600 | 1.28% | 392 | 198 |  |
| St. Francois County | 67,210 | 1.15% | 452 | 149 |  |
| Lincoln County | 66,216 | 10.63% | 627 | 106 |  |
| Newton County | 61,258 | 4.37% | 625 | 98 |  |
| Taney County | 56,801 | 1.32% | 632 | 90 |  |
| Johnson County | 55,475 | 2.67% | 829 | 67 |  |
| Pulaski County | 53,814 | -0.36% | 547 | 98 |  |
| Phelps County | 45,295 | 1.65% | 672 | 67 |  |
| Callaway County | 44,739 | 0.9% | 835 | 54 |  |
| Camden County | 44,328 | 3.56% | 656 | 68 |  |
| Pettis County | 43,663 | 1.53% | 682 | 64 |  |
| Webster County | 42,578 | 9.14% | 593 | 72 |  |
| Butler County | 41,730 | -0.81% | 695 | 60 |  |
| Howell County | 40,847 | 2.63% | 927 | 44 |  |
| Lawrence County | 39,055 | 2.78% | 612 | 64 |  |
| Warren County | 38,322 | 7.25% | 429 | 89 |  |
| Scott County | 37,910 | -0.29% | 420 | 90 |  |
| Laclede County | 37,015 | 2.7% | 765 | 48 |  |
| Barry County | 35,586 | 3.02% | 778 | 46 |  |
| Lafayette County | 33,425 | 1.12% | 628 | 53 |  |
| Stone County | 33,182 | 6.31% | 464 | 72 |  |
| Polk County | 32,901 | 4.06% | 636 | 52 |  |
| Stoddard County | 28,404 | -0.86% | 823 | 35 |  |
| Marion County | 28,183 | -1.06% | 437 | 64 |  |
| Dunklin County | 26,653 | -5.54% | 542 | 49 |  |
| Texas County | 25,934 | 6.62% | 1.2K | 22 |  |
| Miller County | 25,777 | 4.04% | 593 | 43 |  |
| Adair County | 25,093 | -0.69% | 567 | 44 |  |
| Audrain County | 24,306 | -1.94% | 692 | 35 |  |
| McDonald County | 24,213 | 4.01% | 539 | 45 |  |
| Washington County | 23,676 | 1.08% | 760 | 31 |  |
| Randolph County | 23,592 | -3.5% | 483 | 49 |  |
| Ray County | 23,243 | 0.48% | 569 | 41 |  |
| Saline County | 23,095 | -1.01% | 756 | 31 |  |
| Crawford County | 22,779 | -1.11% | 742 | 31 |  |
| Henry County | 22,549 | 2.61% | 697 | 32 |  |
| Morgan County | 22,154 | 5.52% | 598 | 37 |  |
| Clinton County | 21,793 | 2.75% | 419 | 52 |  |
| Benton County | 20,871 | 7.46% | 704 | 30 |  |
| Nodaway County | 20,675 | -1.53% | 877 | 24 |  |
| Vernon County | 19,821 | 0.77% | 826 | 24 |  |
| Wright County | 19,663 | 7.96% | 682 | 29 |  |
| Perry County | 19,022 | 0.27% | 474 | 40 |  |
| Ste. Genevieve County | 18,671 | 1.06% | 499 | 37 |  |
| Andrew County | 18,238 | 0.75% | 433 | 42 |  |
| Pike County | 18,226 | 4.75% | 670 | 27 |  |
| Dallas County | 17,949 | 4.79% | 541 | 33 |  |
| Cooper County | 17,131 | 2.91% | 565 | 30 |  |
| Bates County | 16,314 | 1.63% | 837 | 19 |  |
| Moniteau County | 15,252 | 0.26% | 415 | 37 |  |
| Macon County | 15,246 | 0.33% | 801 | 19 |  |
| New Madrid County | 15,138 | -7.27% | 675 | 22 |  |
| Dent County | 14,806 | 2.91% | 753 | 20 |  |
| Livingston County | 14,779 | 5.68% | 532 | 28 |  |
| Cedar County | 14,743 | 3.74% | 474 | 31 |  |
| Gasconade County | 14,638 | -0.85% | 519 | 28 |  |
| Pemiscot County | 14,361 | -7.87% | 493 | 29 |  |
| Osage County | 13,538 | 2.1% | 607 | 22 |  |
| Madison County | 12,639 | 0.1% | 494 | 26 |  |
| Douglas County | 12,475 | 7.49% | 814 | 15 |  |
| Mississippi County | 11,979 | -1.2% | 412 | 29 |  |
| Barton County | 11,767 | 1.24% | 592 | 20 |  |
| Linn County | 11,756 | -0.86% | 616 | 19 |  |
| Montgomery County | 11,439 | 1.4% | 535 | 21 |  |
| Ripley County | 10,898 | 2.15% | 630 | 17 |  |
| Wayne County | 10,805 | -1.2% | 759 | 14 |  |
| Ralls County | 10,568 | 2.03% | 470 | 22 |  |
| Bollinger County | 10,557 | -0.05% | 618 | 17 |  |
| Howard County | 10,023 | -1.32% | 464 | 22 |  |
| St. Clair County | 9,909 | 6.01% | 675 | 15 |  |
| Grundy County | 9,786 | 0.33% | 435 | 22 |  |
| Lewis County | 9,750 | -2.86% | 505 | 19 |  |
| Iron County | 9,467 | -0.46% | 550 | 17 |  |
| Ozark County | 8,986 | 5.51% | 745 | 12 |  |
| Caldwell County | 8,971 | 1.69% | 426 | 21 |  |
| Hickory County | 8,861 | 6.77% | 399 | 22 |  |
| Monroe County | 8,761 | 0.85% | 648 | 14 |  |
| Oregon County | 8,737 | 1.5% | 790 | 11 |  |
| Daviess County | 8,645 | 2.55% | 563 | 15 |  |
| DeKalb County | 8,488 | -26.82% | 421 | 20 |  |
| Maries County | 8,428 | -0.27% | 527 | 16 |  |
| Carroll County | 8,362 | -1.23% | 695 | 12 |  |
| Harrison County | 8,223 | 0.74% | 723 | 11 |  |
| Dade County | 7,767 | 2.41% | 490 | 16 |  |
| Chariton County | 7,403 | 0.23% | 751 | 10 |  |
| Shannon County | 7,260 | 3.3% | 1K | 7 |  |
| Clark County | 6,567 | -1.4% | 505 | 13 |  |
| Gentry County | 6,300 | 2.74% | 491 | 13 |  |
| Reynolds County | 5,904 | -2.91% | 808 | 7 |  |
| Shelby County | 5,866 | -3.63% | 501 | 12 |  |
| Sullivan County | 5,778 | -3.46% | 648 | 9 |  |
| Carter County | 5,352 | 2.88% | 507 | 11 |  |
| Atchison County | 5,053 | -4.77% | 547 | 9 |  |
| Scotland County | 4,705 | -0.04% | 437 | 11 |  |
| Putnam County | 4,614 | -1.6% | 517 | 9 |  |
| Holt County | 4,242 | 1.27% | 463 | 9 |  |
| Schuyler County | 4,106 | 2.5% | 307 | 13 |  |
| Knox County | 3,669 | -1.87% | 504 | 7 |  |
| Mercer County | 3,472 | -1.17% | 454 | 8 |  |
| Worth County | 1,874 | -4.53% | 267 | 7 |  |
There are 115 counties in Missouri. In 2019, the most populous county in Missouri is St. Louis County with a population of 996,945. This represents modest population decline of 0.19% since the 2010 census. Other major counties in Missouri include Jackson County (700,307), St. Charles County (399,182), and St. Louis City (302,838). These are the only counties with more than 300,000 residents, although there are eight other counties with at least 100,000 residents. Of these counties, St. Charles County experienced the most rapid growth at 10.33% since 2010.
Missouri Counties with Fewest Residents
The smallest Missouri county in terms of population is Worth County with just 2,040 residents. This represents a growth rate of -5.20% since 2010. Missouri has six other counties under 5,000 residents including Mercer County (3,641), Knox County (3,947), and Holt County (4,404). All of these counties lost residents since 2010 with the most dramatic decline in Holt County with a growth rate of -10.40%.
Missouri Counties with Rapid Growth
The fastest-growing county in Missouri since the 2010 census is Platte County with a growth rate of 14.81%, bringing its total population to 102,985. Other counties with rapid growth include Clay County grew 10.63% to 246,365, and St. Charles County grew 10.33% to 399,182, and Boone County grew 10.30% to 180,005. The county with the most significant decline was Pemiscot County which lost 10.94% of its residents.
- Missouri Census Data Center
- US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
- US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
- American Community Survey (2009 - 2013)
- Census QuickFacts
- Historical Populations of States and Counties (1790 - 1990)