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.

Sure, you can copy this list right into your favorite spreadsheet tool. Or save yourself formatting headaches and grab the latest Missouri counties population data as a ready-to-use Excel™ file below. It's time to stop searching and start digging into data!

Download the newest population data for Missouri counties

↓ Download (.xlsx)

Free, Excel™ file.
Trusted by 14,131 businesses.

RankCountyPopulation
1St. Louis County995,569
2Jackson County719,976
3St. Charles County414,535
4Greene County303,375
5St. Louis city/county288,512
6Clay County258,122
7Jefferson County229,458
8Boone County188,043
9Jasper County124,357
10Cass County110,773
11Platte County110,371
12Franklin County105,950
13Christian County92,915
14Buchanan County83,568
15Cape Girardeau County82,735
16Cole County77,032
17St. Francois County66,999
18Lincoln County63,057
19Newton County60,118
20Taney County56,529
21Johnson County54,732
22Pulaski County53,894
23Phelps County45,194
24Callaway County44,741
25Camden County43,667
26Pettis County43,397
27Butler County42,020
28Webster County40,500
29Howell County40,383
30Lawrence County38,593
31Scott County37,933
32Warren County37,177
33Laclede County36,390
34Barry County35,033
35Lafayette County33,115
36Polk County32,444
37Stone County32,048
38Stoddard County28,470
39Marion County28,457
40Dunklin County27,493
41Adair County25,301
42Miller County25,269
43Texas County25,161
44Audrain County24,548
45Randolph County24,365
46McDonald County23,701
47Washington County23,470
48Saline County23,231
49Ray County23,145
50Crawford County22,797
51Henry County22,328
52Morgan County21,717
53Clinton County21,414
54Nodaway County20,774
55Benton County20,151
56Vernon County19,687
57Perry County18,976
58Wright County18,965
59Ste. Genevieve County18,571
60Andrew County18,065
61Pike County17,711
62Dallas County17,551
63Cooper County16,824
64Bates County16,186
65New Madrid County15,731
66Moniteau County15,262
67Macon County15,163
68Pemiscot County14,958
69Gasconade County14,746
70Cedar County14,615
71Dent County14,539
72Livingston County14,364
73Osage County13,402
74Madison County12,729
75Douglas County11,965
76Mississippi County11,902
77Linn County11,852
78Barton County11,690
79Montgomery County11,426
80DeKalb County10,876
81Wayne County10,862
82Ripley County10,708
83Bollinger County10,559
84Ralls County10,428
85Howard County10,147
86Lewis County9,924
87Grundy County9,787
88St. Clair County9,587
89Iron County9,446
90Caldwell County8,927
91Ozark County8,873
92Monroe County8,734
93Oregon County8,673
94Hickory County8,585
95Daviess County8,477
96Maries County8,450
97Carroll County8,411
98Harrison County8,190
99Dade County7,641
100Chariton County7,390
101Shannon County7,177
102Clark County6,675
103Gentry County6,245
104Reynolds County6,010
105Shelby County5,986
106Sullivan County5,857
107Carter County5,297
108Atchison County5,187
109Scotland County4,686
110Putnam County4,642
111Holt County4,240
112Schuyler County4,038
113Knox County3,756
114Mercer County3,482
115Worth County1,934

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/.

Email Me When New Data Are Released

Join thousands of subscribers and receive just 2 (TWO!) emails a year in March and December when the US Census Bureau releases new population data for Missouri counties.

Products & Services

Plumbing

Connect

Cubit logo

© Copyright 2026 Cubit Planning, Inc.