Missouri Population By County in 2018
Updated on January 27, 2024.
According to the US Census Bureau population estimates, there were 6,125,986 people living in Missouri in 2018. St. Louis County was the most populated county with 995,900 residents, followed by Jackson County with 701,809 residents, and St. Charles County with 398,656 residents. Worth County with a population of 2,011 was the least populated county in Missouri in 2018.
Use the map below to interactively explore the population for each county in Missouri in 2018. The data can also be explored further by sorting and filtering with the table below.
You can see similar information for other states and by state for the United States.
Related Topics: Missouri Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage).
See this for other years:
Missouri Population By County (2018)
Table of Missouri Population By County in 2018
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| County | Population | % of State Population |
|---|---|---|
| Adair | 25,593 | 0.42% |
| Andrew | 17,661 | 0.29% |
| Atchison | 5,161 | 0.08% |
| Audrain | 25,411 | 0.42% |
| Barry | 35,687 | 0.58% |
| Barton | 11,756 | 0.19% |
| Bates | 16,320 | 0.27% |
| Benton | 19,377 | 0.32% |
| Bollinger | 12,167 | 0.20% |
| Boone | 179,569 | 2.93% |
| Buchanan | 88,047 | 1.44% |
| Butler | 42,641 | 0.70% |
| Caldwell | 9,073 | 0.15% |
| Callaway | 44,987 | 0.73% |
| Camden | 45,956 | 0.75% |
| Cape Girardeau | 78,810 | 1.29% |
| Carroll | 8,724 | 0.14% |
| Carter | 6,068 | 0.10% |
| Cass | 104,753 | 1.71% |
| Cedar | 14,126 | 0.23% |
| Chariton | 7,449 | 0.12% |
| Christian | 87,248 | 1.42% |
| Clark | 6,827 | 0.11% |
| Clay | 246,798 | 4.03% |
| Clinton | 20,435 | 0.33% |
| Cole | 76,734 | 1.25% |
| Cooper | 17,604 | 0.29% |
| Crawford | 23,948 | 0.39% |
| Dade | 7,560 | 0.12% |
| Dallas | 16,828 | 0.28% |
| Daviess | 8,330 | 0.14% |
| DeKalb | 12,534 | 0.21% |
| Dent | 15,592 | 0.26% |
| Douglas | 13,416 | 0.22% |
| Dunklin | 29,464 | 0.48% |
| Franklin | 103,716 | 1.69% |
| Gasconade | 14,680 | 0.24% |
| Gentry | 6,579 | 0.11% |
| Greene | 291,430 | 4.76% |
| Grundy | 9,949 | 0.16% |
| Harrison | 8,362 | 0.14% |
| Henry | 21,885 | 0.36% |
| Hickory | 9,416 | 0.15% |
| Holt | 4,382 | 0.07% |
| Howard | 10,027 | 0.16% |
| Howell | 40,103 | 0.66% |
| Iron | 10,193 | 0.17% |
| Jackson | 701,809 | 11.46% |
| Jasper | 120,349 | 1.97% |
| Jefferson | 224,656 | 3.67% |
| Johnson | 53,718 | 0.88% |
| Knox | 3,943 | 0.06% |
| Laclede | 35,684 | 0.58% |
| Lafayette | 32,567 | 0.53% |
| Lawrence | 38,271 | 0.63% |
| Lewis | 9,844 | 0.16% |
| Lincoln | 57,604 | 0.94% |
| Linn | 12,002 | 0.20% |
| Livingston | 15,169 | 0.25% |
| McDonald | 23,031 | 0.38% |
| Macon | 15,167 | 0.25% |
| Madison | 12,205 | 0.20% |
| Maries | 8,795 | 0.14% |
| Marion | 28,564 | 0.47% |
| Mercer | 3,625 | 0.06% |
| Miller | 25,269 | 0.41% |
| Mississippi | 13,369 | 0.22% |
| Moniteau | 16,118 | 0.26% |
| Monroe | 8,630 | 0.14% |
| Montgomery | 11,458 | 0.19% |
| Morgan | 20,466 | 0.33% |
| New Madrid | 17,234 | 0.28% |
| Newton | 58,233 | 0.95% |
| Nodaway | 22,244 | 0.36% |
| Oregon | 10,557 | 0.17% |
| Osage | 13,640 | 0.22% |
| Ozark | 9,011 | 0.15% |
| Pemiscot | 16,281 | 0.27% |
| Perry | 19,284 | 0.32% |
| Pettis | 42,449 | 0.69% |
| Phelps | 44,549 | 0.73% |
| Pike | 18,495 | 0.30% |
| Platte | 102,953 | 1.68% |
| Polk | 32,244 | 0.53% |
| Pulaski | 51,982 | 0.85% |
| Putnam | 4,748 | 0.08% |
| Ralls | 10,233 | 0.17% |
| Randolph | 24,697 | 0.40% |
| Ray | 22,924 | 0.37% |
| Reynolds | 6,267 | 0.10% |
| Ripley | 13,428 | 0.22% |
| St. Charles | 398,656 | 6.51% |
| St. Clair | 9,431 | 0.15% |
| Ste. Genevieve | 17,890 | 0.29% |
| St. Francois | 66,740 | 1.09% |
| St. Louis | 995,900 | 16.26% |
| Saline | 22,907 | 0.37% |
| Schuyler | 4,577 | 0.08% |
| Scotland | 4,937 | 0.08% |
| Scott | 38,596 | 0.63% |
| Shannon | 8,192 | 0.13% |
| Shelby | 6,004 | 0.10% |
| Stoddard | 29,288 | 0.48% |
| Stone | 31,729 | 0.52% |
| Sullivan | 6,189 | 0.10% |
| Taney | 55,817 | 0.91% |
| Texas | 25,560 | 0.42% |
| Vernon | 20,544 | 0.34% |
| Warren | 34,801 | 0.57% |
| Washington | 24,900 | 0.41% |
| Wayne | 13,079 | 0.21% |
| Webster | 39,205 | 0.64% |
| Worth | 2,011 | 0.03% |
| Wright | 18,230 | 0.30% |
| St. Louis city | 303,661 | 4.96% |