Population of Counties in (2018)

Name 2018 Population Growth Since 2010
St. Louis County996,726-0.20%
Jackson County698,8953.57%
St. Charles County395,5049.32%
St. Louis city308,626-3.36%
Greene County289,8055.27%
Clay County242,8749.07%
Jefferson County223,8102.14%
Boone County178,2719.26%
Jasper County120,2172.17%
Cass County103,7243.98%
Franklin County103,3301.85%
Platte County101,18712.82%
Buchanan County89,065-0.01%
Christian County85,4329.75%
Cape Girardeau County78,1612.99%
Cole County76,7080.73%
St. Francois County66,7051.79%
Newton County58,2900.21%
Lincoln County56,1836.62%
Taney County55,3556.65%
Johnson County53,8972.24%
Pulaski County52,059-1.49%
Camden County45,6323.56%
Callaway County45,0321.64%
Phelps County44,744-1.25%
Butler County42,666-0.28%
Pettis County42,5580.71%
Howell County40,103-1.14%
Webster County38,6656.64%
Scott County38,541-1.79%
Lawrence County38,434-0.38%
Barry County35,6680.33%
Laclede County35,443-0.65%
Warren County34,3735.49%
Lafayette County32,641-2.25%
Polk County31,7942.02%
Stone County31,699-1.67%
Dunklin County30,119-5.72%
Stoddard County29,369-2.19%
Marion County28,634-0.52%
Texas County25,735-1.14%
Audrain County25,6410.75%
Adair County25,377-0.97%
Miller County25,2282.08%
Washington County25,022-0.68%
Randolph County24,945-2.00%
Crawford County24,102-2.06%
Ray County22,855-2.72%
McDonald County22,828-1.08%
Saline County22,660-3.23%
Nodaway County22,472-3.95%
Henry County21,718-2.36%
Clinton County20,554-0.90%
Vernon County20,437-3.35%
Morgan County20,145-1.92%
Perry County19,2251.52%
Benton County19,074-0.11%
Pike County18,5670.47%
Wright County18,331-2.76%
Ste. Genevieve County17,843-1.53%
Cooper County17,6440.26%
New Madrid County17,582-7.24%
Andrew County17,5551.23%
Pemiscot County16,826-7.91%
Dallas County16,673-0.34%
Bates County16,334-4.11%
Moniteau County16,0632.77%
Dent County15,480-1.41%
Macon County15,251-2.19%
Livingston County15,1730.31%
Gasconade County14,726-3.19%
Cedar County14,0730.74%
Osage County13,662-1.58%
Mississippi County13,586-5.07%
Ripley County13,564-3.77%
Douglas County13,300-2.56%
Wayne County13,296-1.56%
DeKalb County12,588-2.44%
Bollinger County12,306-0.33%
Madison County12,2430.32%
Linn County12,194-4.45%
Barton County11,850-4.34%
Montgomery County11,438-6.37%
Oregon County10,558-3.46%
Iron County10,226-3.57%
Ralls County10,2240.38%
Howard County10,139-0.10%
Lewis County9,967-2.37%
Grundy County9,949-2.97%
Hickory County9,475-1.74%
St. Clair County9,362-4.70%
Ozark County9,186-5.65%
Caldwell County9,100-3.54%
Maries County8,867-3.48%
Carroll County8,796-5.25%
Monroe County8,612-1.94%
Harrison County8,524-4.90%
Daviess County8,361-1.08%
Shannon County8,249-2.37%
Dade County7,588-3.25%
Chariton County7,480-4.66%
Clark County6,723-5.79%
Gentry County6,665-1.22%
Reynolds County6,275-6.06%
Sullivan County6,229-7.54%
Carter County6,169-1.95%
Shelby County6,021-5.42%
Atchison County5,275-6.77%
Scotland County4,9632.54%
Putnam County4,811-3.28%
Schuyler County4,5081.51%
Holt County4,413-10.21%
Knox County3,977-3.59%
Mercer County3,678-2.44%
Worth County2,057-4.50%