This is less than a one percent fall in St. Louis County’s population, from 1,002,838 in 2020 to 997,187 in 2021.
St. Louis County had the largest population in Missouri in 2021.
The US Census Bureau found more than 73 percent of counties in the US saw a natural decrease in population in 2021. This is up from a 55.5 percent increase in 2020.
The Midwest suffered the most sustained population decreases, with many counties along the US East Coast and through the Rocky Mountains seeing increases.
The US population continues to grow, though at a slower rate than before.
Missouri Counties By Population Change from 2020 to 2021
| County | 2020 Estimated Population | 2021 Estimated Population | % Change in Population From Year to Year |
|---|---|---|---|
| Hickory County | 8,303 | 8,607 | 3.7% |
| Ozark County | 8,514 | 8,782 | 3.1% |
| Lincoln County | 59,829 | 61,586 | 2.9% |
| Benton County | 19,409 | 19,908 | 2.6% |
| Christian County | 89,224 | 91,499 | 2.5% |
| Wright County | 18,180 | 18,610 | 2.4% |
| Texas County | 24,413 | 24,987 | 2.4% |
| Warren County | 35,707 | 36,518 | 2.3% |
| Carter County | 5,207 | 5,320 | 2.2% |
| Cedar County | 14,199 | 14,496 | 2.1% |
| Knox County | 3,732 | 3,808 | 2% |
| Morgan County | 20,997 | 21,379 | 1.8% |
| Clark County | 6,632 | 6,736 | 1.6% |
| Camden County | 42,784 | 43,436 | 1.5% |
| Polk County | 31,577 | 32,043 | 1.5% |
| Webster County | 39,168 | 39,735 | 1.4% |
| Dallas County | 17,099 | 17,341 | 1.4% |
| Cass County | 108,113 | 109,638 | 1.4% |
| Platte County | 107,100 | 108,569 | 1.4% |
| Montgomery County | 11,262 | 11,415 | 1.4% |
| Livingston County | 14,562 | 14,755 | 1.3% |
| Newton County | 58,613 | 59,386 | 1.3% |
| Douglas County | 11,592 | 11,732 | 1.2% |
| Stone County | 31,175 | 31,548 | 1.2% |
| Henry County | 21,949 | 22,206 | 1.2% |
| Worth County | 1,962 | 1,983 | 1.1% |
| Boone County | 183,894 | 185,840 | 1.1% |
| Caldwell County | 8,806 | 8,897 | 1% |
| Osage County | 13,249 | 13,379 | 1% |
| St. Francois County | 66,900 | 67,541 | 1% |
| Holt County | 4,186 | 4,226 | 1% |
| Gentry County | 6,115 | 6,173 | 0.9% |
| Phelps County | 44,517 | 44,937 | 0.9% |
| Lawrence County | 37,963 | 38,321 | 0.9% |
| Shannon County | 7,041 | 7,106 | 0.9% |
| St. Charles County | 406,258 | 409,981 | 0.9% |
| Pike County | 17,613 | 17,761 | 0.8% |
| Callaway County | 44,288 | 44,638 | 0.8% |
| Putnam County | 4,676 | 4,712 | 0.8% |
| DeKalb County | 11,014 | 11,098 | 0.8% |
| Miller County | 24,733 | 24,909 | 0.7% |
| Taney County | 56,020 | 56,387 | 0.7% |
| Clay County | 253,923 | 255,518 | 0.6% |
| Ste. Genevieve County | 18,476 | 18,588 | 0.6% |
| Greene County | 299,060 | 300,865 | 0.6% |
| Howell County | 39,750 | 39,975 | 0.6% |
| Pettis County | 42,951 | 43,188 | 0.6% |
| Monroe County | 8,666 | 8,712 | 0.5% |
| Randolph County | 24,636 | 24,760 | 0.5% |
| Barry County | 34,539 | 34,712 | 0.5% |
| Schuyler County | 4,007 | 4,025 | 0.4% |
| Franklin County | 104,769 | 105,231 | 0.4% |
| McDonald County | 23,285 | 23,383 | 0.4% |
| Madison County | 12,600 | 12,652 | 0.4% |
| Cape Girardeau County | 81,788 | 82,113 | 0.4% |
| Clinton County | 21,204 | 21,287 | 0.4% |
| Barton County | 11,613 | 11,658 | 0.4% |
| St. Clair County | 9,340 | 9,376 | 0.4% |
| Bates County | 16,044 | 16,105 | 0.4% |
| Jefferson County | 226,929 | 227,771 | 0.4% |
| Jasper County | 122,766 | 123,155 | 0.3% |
| Gasconade County | 14,745 | 14,791 | 0.3% |
| Laclede County | 36,024 | 36,133 | 0.3% |
| Bollinger County | 10,525 | 10,556 | 0.3% |
| Johnson County | 54,002 | 54,150 | 0.3% |
| Howard County | 10,144 | 10,168 | 0.2% |
| Audrain County | 24,925 | 24,982 | 0.2% |
| Butler County | 42,007 | 42,101 | 0.2% |
| Dade County | 7,586 | 7,599 | 0.2% |
| Marion County | 28,470 | 28,518 | 0.2% |
| Oregon County | 8,617 | 8,631 | 0.2% |
| Cooper County | 17,089 | 17,115 | 0.2% |
| Reynolds County | 6,078 | 6,087 | 0.1% |
| Moniteau County | 15,464 | 15,484 | 0.1% |
| Harrison County | 8,155 | 8,164 | 0.1% |
| Dent County | 14,418 | 14,432 | 0.1% |
| Ralls County | 10,351 | 10,361 | 0.1% |
| Washington County | 23,499 | 23,502 | 0% |
| Wayne County | 10,913 | 10,914 | 0% |
| Cole County | 77,198 | 77,205 | 0% |
| Mississippi County | 12,537 | 12,538 | 0% |
| Macon County | 15,182 | 15,183 | 0% |
| Linn County | 11,849 | 11,843 | -0.1% |
| Jackson County | 717,243 | 716,862 | -0.1% |
| Grundy County | 9,729 | 9,720 | -0.1% |
| Scotland County | 4,698 | 4,693 | -0.1% |
| Saline County | 23,319 | 23,289 | -0.1% |
| Perry County | 18,960 | 18,922 | -0.2% |
| Vernon County | 19,642 | 19,595 | -0.2% |
| Adair County | 25,246 | 25,185 | -0.2% |
| Maries County | 8,427 | 8,406 | -0.2% |
| Nodaway County | 21,218 | 21,160 | -0.3% |
| Pulaski County | 53,964 | 53,816 | -0.3% |
| Lewis County | 10,031 | 10,000 | -0.3% |
| Chariton County | 7,380 | 7,356 | -0.3% |
| Daviess County | 8,427 | 8,399 | -0.3% |
| Ray County | 23,100 | 23,008 | -0.4% |
| Scott County | 38,009 | 37,840 | -0.4% |
| Andrew County | 18,083 | 18,002 | -0.4% |
| Lafayette County | 33,001 | 32,817 | -0.6% |
| St. Louis County | 1,002,838 | 997,187 | -0.6% |
| Ripley County | 10,680 | 10,617 | -0.6% |
| Stoddard County | 28,652 | 28,479 | -0.6% |
| Sullivan County | 5,976 | 5,934 | -0.7% |
| Mercer County | 3,515 | 3,488 | -0.8% |
| Buchanan County | 84,615 | 83,853 | -0.9% |
| Crawford County | 23,026 | 22,807 | -1% |
| Carroll County | 8,461 | 8,376 | -1% |
| Iron County | 9,515 | 9,408 | -1.1% |
| Atchison County | 5,306 | 5,234 | -1.4% |
| Dunklin County | 28,178 | 27,717 | -1.6% |
| New Madrid County | 16,329 | 16,035 | -1.8% |
| Shelby County | 6,101 | 5,976 | -2% |
| Pemiscot County | 15,585 | 15,236 | -2.2% |
| St. Louis city | 300,528 | 293,310 | -2.4% |
ORGANIZATIONS IN THIS STORY
Oakville• City of Greendale• City of Flordell Hills• City of Breckenridge Hills• City of Clarkson Valley• City of Maplewood• City of Kinloch• City of University City• City of Vinita Park• City of Beverly Hills• City of Manchester• Castle Point• City of Pagedale• Mehlville• City of Oakland• City of Moline Acres• City of Overland• City of Black Jack• Glasgow Village• City of Ballwin• City of Pine Lawn• City of Lakeshire• City of Chesterfield• City of Richmond Heights• City of Maryland Heights• Village of Twin Oaks• City of St. John• City of Valley Park• Velda Village Hills• Village of Riverview• City of Berkeley• City of Ferguson• Normandy• Village of Hanley Hills• City of Huntleigh• Bel-Ridge• Concord• Bel-Nor• City of Wellston• City of Crystal Lake Park• City of Glendale• City of Webster Groves• City of Woodson Terrace• City of Ladue• City of Shrewsbury• City of Winchester• City of Town & Country• St. George• Sappington• City of Calverton Park• City of Cool Valley• City of Crestwood• Village of Mackenzie• Village of Sycamore Hills• Old Jamestown• City of Rock Hill• City of Bridgeton• Village of Glen Echo Park• Village of Hillsdale• Lemay• Village of Westwood• City of Dellwood• City of Sunset Hills• City of Jennings• Affton• Marlborough• Village of Uplands Park• City of Warson Woods• City of Wildwood• City of Velda• City of Olivette• Town of Norwood Court• City of Creve Coeur• City of Hazelwood• City of Pasadena Hills• Spanish Lake• City of St. Ann• City of Brentwood• City of Bella Villa• City of Eureka• Village of Pasadena Park• City of Green Park• City Of Charlack• City Of Kirkwood• City Of Clayton• City Of Ellisville• Village Of Champ• City Of Fenton• City Of Northwoods• Village Of Country Life Acres• City Of Florissant• City Of Bellefontaine Neighbors• Bellerive• Village Of Wilbur Park• City Of Frontenac• Grantwood Village• Village Of Vinita Terrace• City Of Des Peres• City Of Country Club Hills• City Of Edmundson
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