Missouri Counties by Population (2025)
2025 Pop.
100K
200K
300K
400K
500K
600K
700K
800K
900K
Top 5 Most Populous Counties
994,983
734,441
429,494
310,754
276,618
115 Counties
| County | 2025 Pop. ↓ | Area (mi²) | Density | Change (2020) |
|---|---|---|---|---|
| St. Louis County | 994,983 | 508 | 1,959 | -0.84% |
| Jackson County | 734,441 | 605 | 1,214 | 2.34% |
| St. Charles County | 429,494 | 561 | 766 | 5.68% |
| Greene County | 310,754 | 675 | 460 | 3.82% |
| St. Louis city | 276,618 | 62 | 4,462 | -7.89% |
| Clay County | 266,590 | 398 | 670 | 4.9% |
| Jefferson County | 232,621 | 656 | 355 | 2.5% |
| Boone County | 194,170 | 686 | 283 | 5.5% |
| Jasper County | 127,841 | 639 | 200 | 4.02% |
| Cass County | 116,051 | 697 | 167 | 7.29% |
| Platte County | 114,302 | 420 | 272 | 6.63% |
| Franklin County | 108,068 | 923 | 117 | 3.05% |
| Christian County | 97,621 | 563 | 173 | 9.33% |
| Cape Girardeau County | 84,206 | 579 | 145 | 2.91% |
| Buchanan County | 83,947 | 408 | 206 | -0.62% |
| Cole County | 77,932 | 392 | 199 | 1.71% |
| St. Francois County | 67,912 | 452 | 150 | 2.21% |
| Lincoln County | 67,069 | 627 | 107 | 12.05% |
| Newton County | 62,225 | 625 | 100 | 6.01% |
| Taney County | 56,698 | 632 | 90 | 1.13% |
| Johnson County | 56,653 | 829 | 68 | 4.84% |
| Pulaski County | 54,099 | 547 | 99 | 0.11% |
| Phelps County | 45,827 | 672 | 68 | 2.82% |
| Callaway County | 45,434 | 835 | 54 | 2.45% |
| Camden County | 44,171 | 656 | 67 | 3.19% |
| Pettis County | 43,991 | 682 | 65 | 2.3% |
| Webster County | 42,601 | 593 | 72 | 9.21% |
| Butler County | 41,718 | 695 | 60 | -0.82% |
| Howell County | 40,817 | 927 | 44 | 2.54% |
| Lawrence County | 39,423 | 612 | 64 | 3.75% |
| Warren County | 39,141 | 429 | 91 | 9.52% |
| Scott County | 37,991 | 420 | 90 | -0.08% |
| Laclede County | 36,802 | 765 | 48 | 2.1% |
| Barry County | 35,926 | 778 | 46 | 4.01% |
| Lafayette County | 33,778 | 628 | 54 | 2.2% |
| Polk County | 33,322 | 636 | 52 | 5.4% |
| Stone County | 32,580 | 464 | 70 | 4.41% |
| Marion County | 28,538 | 437 | 65 | 0.16% |
| Stoddard County | 28,504 | 823 | 35 | -0.51% |
| Dunklin County | 26,938 | 542 | 50 | -4.53% |
| Adair County | 26,089 | 567 | 46 | 3.23% |
| Texas County | 25,824 | 1.2K | 22 | 6.17% |
| Miller County | 25,770 | 593 | 43 | 4% |
| Audrain County | 24,266 | 692 | 35 | -2.08% |
| Randolph County | 24,049 | 483 | 50 | -1.67% |
| McDonald County | 23,991 | 539 | 45 | 3.06% |
| Washington County | 23,624 | 760 | 31 | 0.82% |
| Saline County | 23,438 | 756 | 31 | 0.42% |
| Ray County | 23,220 | 569 | 41 | 0.37% |
| Crawford County | 22,925 | 742 | 31 | -0.48% |
| Morgan County | 22,835 | 598 | 38 | 8.73% |
| Henry County | 22,693 | 697 | 33 | 3.23% |
| Clinton County | 21,873 | 419 | 52 | 3.09% |
| Benton County | 20,668 | 704 | 29 | 6.4% |
| Nodaway County | 20,313 | 877 | 23 | -3.27% |
| Vernon County | 19,806 | 826 | 24 | 0.67% |
| Wright County | 19,637 | 682 | 29 | 7.81% |
| Perry County | 19,250 | 474 | 41 | 1.47% |
| Ste. Genevieve County | 18,452 | 499 | 37 | -0.14% |
| Andrew County | 18,073 | 433 | 42 | -0.16% |
| Pike County | 17,995 | 670 | 27 | 3.34% |
| Dallas County | 17,961 | 541 | 33 | 4.84% |
| Cooper County | 17,318 | 565 | 31 | 4.03% |
| Bates County | 16,562 | 837 | 20 | 3.17% |
| Moniteau County | 15,343 | 415 | 37 | 0.83% |
| Cedar County | 15,340 | 474 | 32 | 7.92% |
| Macon County | 15,181 | 801 | 19 | -0.12% |
| New Madrid County | 15,036 | 675 | 22 | -7.92% |
| Dent County | 14,788 | 753 | 20 | 2.77% |
| Livingston County | 14,721 | 532 | 28 | 5.23% |
| Gasconade County | 14,579 | 519 | 28 | -1.25% |
| Pemiscot County | 14,145 | 493 | 29 | -9.26% |
| Osage County | 13,477 | 607 | 22 | 1.67% |
| Madison County | 12,965 | 494 | 26 | 2.69% |
| Douglas County | 12,356 | 814 | 15 | 6.52% |
| Linn County | 12,012 | 616 | 20 | 1.31% |
| Barton County | 11,691 | 592 | 20 | 0.59% |
| Mississippi County | 11,648 | 412 | 28 | -3.9% |
| Montgomery County | 11,592 | 535 | 22 | 2.71% |
| Wayne County | 10,815 | 759 | 14 | -1.1% |
| Bollinger County | 10,684 | 618 | 17 | 1.22% |
| Ripley County | 10,621 | 630 | 17 | -0.46% |
| Ralls County | 10,497 | 470 | 22 | 1.38% |
| Howard County | 10,184 | 464 | 22 | 0.27% |
| St. Clair County | 9,953 | 675 | 15 | 6.49% |
| DeKalb County | 9,869 | 421 | 23 | -14.89% |
| Lewis County | 9,864 | 505 | 20 | -1.74% |
| Grundy County | 9,725 | 435 | 22 | -0.33% |
| Iron County | 9,386 | 550 | 17 | -1.34% |
| Ozark County | 9,184 | 745 | 12 | 7.81% |
| Monroe County | 9,049 | 648 | 14 | 4.1% |
| Caldwell County | 9,024 | 426 | 21 | 2.3% |
| Hickory County | 8,817 | 399 | 22 | 6.25% |
| Oregon County | 8,679 | 790 | 11 | 0.79% |
| Maries County | 8,571 | 527 | 16 | 1.42% |
| Daviess County | 8,528 | 563 | 15 | 1.13% |
| Carroll County | 8,461 | 695 | 12 | -0.04% |
| Harrison County | 8,156 | 723 | 11 | -0.01% |
| Dade County | 7,525 | 490 | 15 | -0.8% |
| Chariton County | 7,391 | 751 | 10 | 0.01% |
| Shannon County | 7,296 | 1K | 7 | 3.71% |
| Clark County | 6,598 | 505 | 13 | -0.9% |
| Gentry County | 6,285 | 491 | 13 | 2.43% |
| Shelby County | 5,922 | 501 | 12 | -2.84% |
| Reynolds County | 5,889 | 808 | 7 | -3.13% |
| Sullivan County | 5,659 | 648 | 9 | -5.3% |
| Carter County | 5,389 | 507 | 11 | 3.54% |
| Atchison County | 5,162 | 547 | 9 | -2.7% |
| Scotland County | 4,698 | 437 | 11 | -0.15% |
| Putnam County | 4,439 | 517 | 9 | -5.25% |
| Holt County | 4,216 | 463 | 9 | 0.6% |
| Schuyler County | 4,065 | 307 | 13 | 1.37% |
| Knox County | 3,744 | 504 | 7 | 0.13% |
| Mercer County | 3,405 | 454 | 8 | -3.05% |
| Worth County | 1,841 | 267 | 7 | -6.45% |
Overview of Missouri Counties
There are 115 counties in Missouri.
St. Louis County is the largest county in the state, with a population of 994,983. The most recent census shows that its population has decreased by 0.01% since the previous census.
A number of other Missouri counties also boast relatively large populations for their state, though not able to match the density of St. Louis County:
- Jackson County : 734,441
- St. Charles County : 429,494
Missouri Counties with the Fewest Residents
The smallest county in Missouri is Worth County , with a population of just 1,841. This total represents a decrease of 0.1% since the last census count was performed.
Other small counties include:
- Mercer County : 3,405
- Knox County : 3,744
- Schuyler County : 4,065
Missouri Counties with Rapid Growth
Lincoln County , with its current population of 67,069, has shown the largest population growth, with an increase of 0.1% since the last census.
Jackson County has also had relatively high population growth of 0.02% with 734,441 residents.
On the other hand, DeKalb County has had the largest decrease in population, with its 9,869 current residents totalling 0.1% less than the previous census.
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)