Missouri Counties by Population (2025)

by Kristen Carney Kristen Carney

Updated: August 7, 2025

The most populous counties in Missouri are St. Louis County with 992,929, Jackson County at 727,362, St. Charles County with 423,726, Greene County at 307,942, and St. Louis city/county with 279,695. 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 Population Estimates Program.

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Rank County Population
1 St. Louis County 992,929
2 Jackson County 727,362
3 St. Charles County 423,726
4 Greene County 307,942
5 St. Louis city/county 279,695
6 Clay County 263,370
7 Jefferson County 231,888
8 Boone County 192,154
9 Jasper County 126,479
10 Cass County 113,873
11 Platte County 113,207
12 Franklin County 107,256
13 Christian County 96,045
14 Cape Girardeau County 83,658
15 Buchanan County 83,574
16 Cole County 77,625
17 St. Francois County 67,503
18 Lincoln County 65,888
19 Newton County 61,519
20 Taney County 56,744
21 Johnson County 55,880
22 Pulaski County 53,964
23 Phelps County 45,672
24 Callaway County 45,126
25 Camden County 44,135
26 Pettis County 43,791
27 Webster County 42,041
28 Butler County 41,814
29 Howell County 40,762
30 Lawrence County 39,151
31 Warren County 38,478
32 Scott County 37,957
33 Laclede County 36,738
34 Barry County 35,618
35 Lafayette County 33,511
36 Polk County 33,070
37 Stone County 32,630
38 Stoddard County 28,438
39 Marion County 28,425
40 Dunklin County 27,002
41 Texas County 25,715
42 Miller County 25,668
43 Adair County 25,660
44 Audrain County 24,304
45 Randolph County 24,077
46 McDonald County 24,054
47 Washington County 23,583
48 Saline County 23,325
49 Ray County 23,199
50 Crawford County 22,808
51 Henry County 22,575
52 Morgan County 22,399
53 Clinton County 21,721
54 Benton County 20,614
55 Nodaway County 20,503
56 Vernon County 19,787
57 Wright County 19,505
58 Perry County 19,100
59 Ste. Genevieve County 18,546
60 Andrew County 18,091
61 Pike County 17,961
62 Dallas County 17,877
63 Cooper County 17,122
64 Bates County 16,394
65 Moniteau County 15,294
66 New Madrid County 15,212
67 Macon County 15,177
68 Cedar County 15,023
69 Dent County 14,721
70 Livingston County 14,658
71 Gasconade County 14,655
72 Pemiscot County 14,407
73 Osage County 13,478
74 Madison County 12,852
75 Douglas County 12,290
76 Linn County 11,910
77 Mississippi County 11,750
78 Barton County 11,717
79 Montgomery County 11,511
80 Wayne County 10,820
81 Ripley County 10,715
82 Bollinger County 10,610
83 Ralls County 10,499
84 Howard County 10,150
85 DeKalb County 9,884
86 Lewis County 9,852
87 St. Clair County 9,848
88 Grundy County 9,766
89 Iron County 9,420
90 Ozark County 9,090
91 Caldwell County 9,000
92 Monroe County 8,890
93 Hickory County 8,766
94 Oregon County 8,699
95 Daviess County 8,541
96 Maries County 8,506
97 Carroll County 8,414
98 Harrison County 8,186
99 Dade County 7,622
100 Chariton County 7,397
101 Shannon County 7,275
102 Clark County 6,623
103 Gentry County 6,298
104 Reynolds County 5,927
105 Shelby County 5,926
106 Sullivan County 5,750
107 Carter County 5,359
108 Atchison County 5,139
109 Scotland County 4,698
110 Putnam County 4,539
111 Holt County 4,241
112 Schuyler County 4,069
113 Knox County 3,740
114 Mercer County 3,452
115 Worth County 1,872

United States Census Bureau. Annual Estimates of the Resident Population: April 1, 2020 to July 1, 2024. Population Division. May 2025.

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