Missouri Counties by Population (2026)
2026 Pop.
100K
200K
300K
400K
500K
600K
700K
800K
900K
Top 5 Most Populous Counties
990,156
736,865
430,408
311,398
275,843
| County | 2026 Pop. ↓ | Area (mi²) | Density (/mi²) | Change (2020) |
|---|---|---|---|---|
| St. Louis County | 990,156 | 508 | 1,949 | -1.32% |
| Jackson County | 736,865 | 605 | 1,218 | 2.68% |
| St. Charles County | 430,408 | 561 | 767 | 5.91% |
| Greene County | 311,398 | 675 | 461 | 4.03% |
| St. Louis city | 275,843 | 62 | 4,449 | -8.14% |
| Clay County | 267,390 | 398 | 672 | 5.22% |
| Jefferson County | 234,130 | 656 | 357 | 3.17% |
| Boone County | 192,595 | 686 | 281 | 4.64% |
| Jasper County | 128,387 | 639 | 201 | 4.48% |
| Cass County | 117,774 | 697 | 169 | 8.89% |
| Platte County | 115,773 | 420 | 276 | 8.01% |
| Franklin County | 108,793 | 923 | 118 | 3.76% |
| Christian County | 97,414 | 563 | 173 | 9.1% |
| Cape Girardeau County | 84,541 | 579 | 146 | 3.34% |
| Buchanan County | 83,482 | 408 | 205 | -1.17% |
| Cole County | 78,053 | 392 | 199 | 1.89% |
| St. Francois County | 68,169 | 452 | 151 | 2.61% |
| Lincoln County | 67,574 | 627 | 108 | 12.92% |
| Newton County | 62,918 | 625 | 101 | 7.18% |
| Johnson County | 57,516 | 829 | 69 | 6.47% |
| Taney County | 57,120 | 632 | 90 | 1.9% |
| Pulaski County | 54,992 | 547 | 101 | 1.83% |
| Callaway County | 46,291 | 835 | 55 | 4.4% |
| Phelps County | 45,288 | 672 | 67 | 1.65% |
| Pettis County | 44,614 | 682 | 65 | 3.73% |
| Webster County | 44,024 | 593 | 74 | 12.85% |
| Camden County | 43,899 | 656 | 67 | 2.56% |
| Butler County | 41,909 | 695 | 60 | -0.37% |
| Howell County | 40,712 | 927 | 44 | 2.29% |
| Lawrence County | 39,593 | 612 | 65 | 4.22% |
| Warren County | 39,505 | 429 | 92 | 10.53% |
| Scott County | 38,013 | 420 | 91 | -0.02% |
| Laclede County | 37,197 | 765 | 49 | 3.19% |
| Barry County | 36,670 | 778 | 47 | 6.14% |
| Polk County | 33,997 | 636 | 53 | 7.53% |
| Lafayette County | 33,630 | 628 | 54 | 1.73% |
| Stone County | 32,436 | 464 | 70 | 3.92% |
| Marion County | 28,642 | 437 | 66 | 0.57% |
| Stoddard County | 28,184 | 823 | 34 | -1.65% |
| Dunklin County | 26,653 | 542 | 49 | -5.54% |
| Texas County | 26,284 | 1.2K | 22 | 8.06% |
| Miller County | 25,951 | 593 | 44 | 4.76% |
| Adair County | 25,751 | 567 | 45 | 1.88% |
| Audrain County | 24,712 | 692 | 36 | -0.27% |
| Randolph County | 24,647 | 483 | 51 | 0.76% |
| McDonald County | 24,159 | 539 | 45 | 3.77% |
| Washington County | 24,009 | 760 | 32 | 2.46% |
| Ray County | 23,531 | 569 | 41 | 1.71% |
| Saline County | 23,317 | 756 | 31 | -0.07% |
| Crawford County | 23,019 | 742 | 31 | -0.05% |
| Henry County | 22,777 | 697 | 33 | 3.64% |
| Morgan County | 22,475 | 598 | 38 | 7.04% |
| Clinton County | 21,630 | 419 | 52 | 1.96% |
| Benton County | 20,536 | 704 | 29 | 5.69% |
| Vernon County | 20,114 | 826 | 24 | 2.31% |
| Nodaway County | 20,052 | 877 | 23 | -4.61% |
| Wright County | 19,810 | 682 | 29 | 8.79% |
| Perry County | 19,073 | 474 | 40 | 0.54% |
| Ste. Genevieve County | 18,776 | 499 | 38 | 1.6% |
| Andrew County | 18,367 | 433 | 42 | 1.42% |
| Dallas County | 18,192 | 541 | 34 | 6.18% |
| Pike County | 17,879 | 670 | 27 | 2.69% |
| Cooper County | 17,136 | 565 | 30 | 2.96% |
| Bates County | 16,576 | 837 | 20 | 3.26% |
| Moniteau County | 15,429 | 415 | 37 | 1.35% |
| Macon County | 15,197 | 801 | 19 | -0.01% |
| New Madrid County | 14,891 | 675 | 22 | -8.81% |
| Gasconade County | 14,859 | 519 | 29 | 0.65% |
| Cedar County | 14,848 | 474 | 31 | 4.49% |
| Livingston County | 14,730 | 532 | 28 | 1.2% |
| Dent County | 14,507 | 753 | 19 | 0.8% |
| Pemiscot County | 14,451 | 493 | 29 | -7.26% |
| Osage County | 13,753 | 607 | 23 | 3.8% |
| Madison County | 12,872 | 494 | 26 | 1.97% |
| Douglas County | 12,408 | 814 | 15 | 6.93% |
| Mississippi County | 12,058 | 412 | 29 | -0.62% |
| Barton County | 11,840 | 592 | 20 | 1.86% |
| Linn County | 11,756 | 616 | 19 | -0.83% |
| Montgomery County | 11,624 | 535 | 22 | 2.93% |
| Bollinger County | 10,722 | 618 | 17 | 1.57% |
| Ripley County | 10,718 | 630 | 17 | 0.45% |
| Wayne County | 10,713 | 759 | 14 | -2.05% |
| Ralls County | 10,437 | 470 | 22 | 0.82% |
| Howard County | 10,229 | 464 | 22 | 0.74% |
| St. Clair County | 10,109 | 675 | 15 | 8.12% |
| Lewis County | 9,905 | 505 | 20 | -1.36% |
| Grundy County | 9,739 | 435 | 22 | -0.26% |
| DeKalb County | 9,708 | 421 | 23 | -16.35% |
| Ozark County | 9,245 | 745 | 12 | 8.53% |
| Iron County | 9,223 | 550 | 17 | -3.04% |
| Hickory County | 9,199 | 399 | 23 | 10.75% |
| Monroe County | 9,061 | 648 | 14 | 4.25% |
| Caldwell County | 9,053 | 426 | 21 | 2.57% |
| Oregon County | 8,754 | 790 | 11 | 1.73% |
| Daviess County | 8,608 | 563 | 15 | 2.05% |
| Carroll County | 8,421 | 695 | 12 | -0.53% |
| Harrison County | 8,326 | 723 | 12 | 2.06% |
| Maries County | 8,300 | 527 | 16 | -1.83% |
| Dade County | 7,969 | 490 | 16 | 5.06% |
| Chariton County | 7,364 | 751 | 9.8 | -0.3% |
| Shannon County | 7,286 | 1K | 7.3 | 3.58% |
| Gentry County | 6,458 | 491 | 13 | 5.37% |
| Clark County | 6,366 | 505 | 13 | -4.47% |
| Reynolds County | 6,064 | 808 | 7.5 | -0.21% |
| Shelby County | 5,754 | 501 | 11 | -5.52% |
| Sullivan County | 5,714 | 648 | 8.8 | -4.53% |
| Carter County | 5,473 | 507 | 11 | 5.23% |
| Atchison County | 5,183 | 547 | 9.5 | -2.34% |
| Scotland County | 4,916 | 437 | 11 | 4.64% |
| Putnam County | 4,530 | 517 | 8.8 | -3.33% |
| Schuyler County | 4,207 | 307 | 14 | 5.02% |
| Holt County | 4,182 | 463 | 9.0 | -0.02% |
| Knox County | 3,748 | 504 | 7.4 | 0.4% |
| Mercer County | 3,394 | 454 | 7.5 | -3.47% |
| Worth County | 1,916 | 267 | 7.2 | -2.49% |
Sources
- 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)