Data / Rankings / Population density / Counties in Missouri

Counties in Missouri by population density, 2025

St. Louis city had the highest population density of 115 counties in 2025, at 1,740.1 inhabitants per km². Worth County had the lowest, at 2.8 inhabitants per km². The median was 11.9 inhabitants per km² and the figure for Missouri was 35.2 inhabitants per km². Source: the U.S. Census Bureau.

Highest1,740.1St. Louis city
Lowest2.8Worth County
Median11.9115 counties
Missouri35.2History

Top 40 counties, 2025

CSVChart (SVG)

St. Louis citySt. Louis city: 1,740.1 inhabitants per km²1,740.1St. Louis CountySt. Louis County: 752.4 inhabitants per km²752.4Jackson CountyJackson County: 468 inhabitants per km²468St. Charles CountySt. Charles County: 293.9 inhabitants per km²293.9Clay CountyClay County: 257.3 inhabitants per km²257.3Greene CountyGreene County: 176.8 inhabitants per km²176.8Jefferson CountyJefferson County: 137.2 inhabitants per km²137.2Boone CountyBoone County: 108 inhabitants per km²108Platte CountyPlatte County: 105.2 inhabitants per km²105.2Buchanan CountyBuchanan County: 79 inhabitants per km²79Jasper CountyJasper County: 77.1 inhabitants per km²77.1Cole CountyCole County: 76.8 inhabitants per km²76.8Christian CountyChristian County: 66.4 inhabitants per km²66.4Cass CountyCass County: 64.2 inhabitants per km²64.2St. Francois CountySt. Francois County: 57.9 inhabitants per km²57.9Cape Girardeau CountyCape Girardeau County: 56.1 inhabitants per km²56.1Franklin CountyFranklin County: 45.2 inhabitants per km²45.2Lincoln CountyLincoln County: 41.1 inhabitants per km²41.1Newton CountyNewton County: 38.5 inhabitants per km²38.5Pulaski CountyPulaski County: 38.4 inhabitants per km²38.4Warren CountyWarren County: 35.1 inhabitants per km²35.1Scott CountyScott County: 34.9 inhabitants per km²34.9Taney CountyTaney County: 34.8 inhabitants per km²34.8Webster CountyWebster County: 28.1 inhabitants per km²28.1Stone CountyStone County: 27.1 inhabitants per km²27.1Johnson CountyJohnson County: 26.4 inhabitants per km²26.4Phelps CountyPhelps County: 26 inhabitants per km²26Camden CountyCamden County: 25.9 inhabitants per km²25.9Marion CountyMarion County: 25.2 inhabitants per km²25.2Pettis CountyPettis County: 25 inhabitants per km²25Lawrence CountyLawrence County: 24.9 inhabitants per km²24.9Butler CountyButler County: 23.3 inhabitants per km²23.3Callaway CountyCallaway County: 21.2 inhabitants per km²21.2Lafayette CountyLafayette County: 20.6 inhabitants per km²20.6Polk CountyPolk County: 20.4 inhabitants per km²20.4Clinton CountyClinton County: 20 inhabitants per km²20Randolph CountyRandolph County: 19.6 inhabitants per km²19.6Dunklin CountyDunklin County: 19.1 inhabitants per km²19.1Laclede CountyLaclede County: 18.7 inhabitants per km²18.7Barry CountyBarry County: 18 inhabitants per km²18
inhabitants per km². Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2025
inhabitants per km²		Change on 2024
1St. Louis city1,740.1-0.8%
2St. Louis County752.4-0.1%
3Jackson County468+0.5%
4St. Charles County293.9+0.9%
5Clay County257.3+0.9%
6Greene County176.8+0.7%
7Jefferson County137.2+0.4%
8Boone County108+0.4%
9Platte County105.2+1.2%
10Buchanan County79-0.1%
11Jasper County77.1+0.8%
12Cole County76.8+0.2%
13Christian County66.4+0.7%
14Cass County64.2+1.7%
15St. Francois County57.9+0.5%
16Cape Girardeau County56.1+0.6%
17Franklin County45.2+0.7%
18Lincoln County41.1+1.4%
19Newton County38.5+1.1%
20Pulaski County38.4+1%
21Warren County35.1+1.3%
22Scott County34.9+0.1%
23Taney County34.8+0.2%
24Webster County28.1+2.3%
25Stone County27.1-0.2%
26Johnson County26.4+1.5%
27Phelps County26+0.1%
28Camden County25.9-0.3%
29Marion County25.2+0.4%
30Pettis County25+0.8%
31Lawrence County24.9+0.5%
32Butler County23.30%
33Callaway County21.2+1.2%
34Lafayette County20.6+0.3%
35Polk County20.4+1.2%
36Clinton County20-0.1%
37Randolph County19.6+0.5%
38Dunklin County19.1-0.7%
39Laclede County18.7+0.7%
40Barry County18+1.3%
41Adair County17.5+0.3%
42McDonald County17.2+0.7%
43Howell County17-0.2%
44Miller County16.8+0.5%
45Andrew County16.3+0.7%
46Ray County15.9+0.6%
47Perry County15.5-0.1%
48Morgan County14.5+0.2%
49Ste. Genevieve County14.5+0.5%
50Moniteau County14.40%
51Audrain County13.7+0.8%
52Stoddard County13.3-0.4%
53Dallas County12.9+0.9%
54Henry County12.6+0.5%
55Cedar County12.1-0.3%
56Washington County12.1+0.8%
57Crawford County11.9+0.4%
58Saline County11.9+0.2%
59Cooper County11.70%
60Pemiscot County11.3-0.1%
61Benton County11.30%
62Mississippi County11.3+0.5%
63Wright County11.1+0.7%
64Gasconade County11+0.5%
65Livingston County10.7+0.2%
66Pike County10.3-0.4%
67Madison County10+0.1%
68Vernon County9.3+0.8%
69DeKalb County9-0.9%
70Nodaway County8.9-0.6%
71Hickory County8.8+1.7%
72Osage County8.7+1.1%
73Grundy County8.6-0%
74New Madrid County8.6-1.3%
75Ralls County8.6-0.1%
76Texas County8.5+1.1%
77Howard County8.5+0.5%
78Montgomery County8.4+0.3%
79Caldwell County8.2+0.5%
80Barton County7.7+0.4%
81Bates County7.6+0.4%
82Lewis County7.6+0.3%
83Dent County7.5-0.5%
84Linn County7.4-0.5%
85Macon County7.30%
86Bollinger County6.7+0.7%
87Ripley County6.60%
88Iron County6.5-1%
89Maries County6.2-1.1%
90Dade County6.1+2.2%
91Daviess County5.9+0.6%
92Douglas County5.9+0.5%
93St. Clair County5.7+1.3%
94Wayne County5.5-0.7%
95Monroe County5.3+1.2%
96Schuyler County5.2+1.7%
97Gentry County5+1.2%
98Clark County5-1.7%
99Ozark County4.8+0.8%
100Carroll County4.7+0.1%
101Shelby County4.5-1.9%
102Harrison County4.4+0.5%
103Oregon County4.3+0.5%
104Scotland County4.2+2.6%
105Carter County4.1+1%
106Chariton County3.8-0.2%
107Atchison County3.7+0.2%
108Holt County3.5-0.4%
109Sullivan County3.4-0.4%
110Putnam County3.4-0.4%
111Mercer County2.9-0.3%
112Reynolds County2.9+1.2%
113Knox County2.9+0.5%
114Shannon County2.80%
115Worth County2.8+0.1%

Other periods

About this ranking

Resident population divided by land area in km². World Bank figures use mid-year population and land area excluding inland water.

United States: Census Bureau population estimates for 1 July divided by land area (water excluded) from the latest Census Gazetteer files. US tables often give people per square mile; multiply persons per km² by 2.59 to compare.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-09.

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Questions

Which county has the highest population density?

St. Louis city, with 1,740.1 inhabitants per km² in 2025, according to the U.S. Census Bureau.

Which county has the lowest population density?

Worth County, with 2.8 inhabitants per km² in 2025.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². Retrieved 2026-10-09.

Population density: other rankings

Counties in Missouri: more rankings