Missouri Counties by Population (2026)

by Kristen Carney

Updated: February 9, 2026

The most populous counties in Missouri are St. Louis County with 995,569, Jackson County at 719,976, St. Charles County with 414,535, Greene County at 303,375, and St. Louis city/county with 288,512. You can get the most current Census population data for all 115 Missouri counties, sorted from the most populous counties in Missouri to the least, according to the 2024 American Community Survey.

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Rank County Population
1 St. Louis County 995,569
2 Jackson County 719,976
3 St. Charles County 414,535
4 Greene County 303,375
5 St. Louis city/county 288,512
6 Clay County 258,122
7 Jefferson County 229,458
8 Boone County 188,043
9 Jasper County 124,357
10 Cass County 110,773
11 Platte County 110,371
12 Franklin County 105,950
13 Christian County 92,915
14 Buchanan County 83,568
15 Cape Girardeau County 82,735
16 Cole County 77,032
17 St. Francois County 66,999
18 Lincoln County 63,057
19 Newton County 60,118
20 Taney County 56,529
21 Johnson County 54,732
22 Pulaski County 53,894
23 Phelps County 45,194
24 Callaway County 44,741
25 Camden County 43,667
26 Pettis County 43,397
27 Butler County 42,020
28 Webster County 40,500
29 Howell County 40,383
30 Lawrence County 38,593
31 Scott County 37,933
32 Warren County 37,177
33 Laclede County 36,390
34 Barry County 35,033
35 Lafayette County 33,115
36 Polk County 32,444
37 Stone County 32,048
38 Stoddard County 28,470
39 Marion County 28,457
40 Dunklin County 27,493
41 Adair County 25,301
42 Miller County 25,269
43 Texas County 25,161
44 Audrain County 24,548
45 Randolph County 24,365
46 McDonald County 23,701
47 Washington County 23,470
48 Saline County 23,231
49 Ray County 23,145
50 Crawford County 22,797
51 Henry County 22,328
52 Morgan County 21,717
53 Clinton County 21,414
54 Nodaway County 20,774
55 Benton County 20,151
56 Vernon County 19,687
57 Perry County 18,976
58 Wright County 18,965
59 Ste. Genevieve County 18,571
60 Andrew County 18,065
61 Pike County 17,711
62 Dallas County 17,551
63 Cooper County 16,824
64 Bates County 16,186
65 New Madrid County 15,731
66 Moniteau County 15,262
67 Macon County 15,163
68 Pemiscot County 14,958
69 Gasconade County 14,746
70 Cedar County 14,615
71 Dent County 14,539
72 Livingston County 14,364
73 Osage County 13,402
74 Madison County 12,729
75 Douglas County 11,965
76 Mississippi County 11,902
77 Linn County 11,852
78 Barton County 11,690
79 Montgomery County 11,426
80 DeKalb County 10,876
81 Wayne County 10,862
82 Ripley County 10,708
83 Bollinger County 10,559
84 Ralls County 10,428
85 Howard County 10,147
86 Lewis County 9,924
87 Grundy County 9,787
88 St. Clair County 9,587
89 Iron County 9,446
90 Caldwell County 8,927
91 Ozark County 8,873
92 Monroe County 8,734
93 Oregon County 8,673
94 Hickory County 8,585
95 Daviess County 8,477
96 Maries County 8,450
97 Carroll County 8,411
98 Harrison County 8,190
99 Dade County 7,641
100 Chariton County 7,390
101 Shannon County 7,177
102 Clark County 6,675
103 Gentry County 6,245
104 Reynolds County 6,010
105 Shelby County 5,986
106 Sullivan County 5,857
107 Carter County 5,297
108 Atchison County 5,187
109 Scotland County 4,686
110 Putnam County 4,642
111 Holt County 4,240
112 Schuyler County 4,038
113 Knox County 3,756
114 Mercer County 3,482
115 Worth County 1,934

United States Census Bureau. B01001 SEX BY AGE, 2024 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. January 29, 2026. http://www.census.gov/.

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