Ranking of Missouri Counties By Population in 2020
Updated on August 1, 2024.
Based on the US Census Vintage data estimates, in 2020, the Population for Missouri was 6.15M. Among all Missouri counties, St. Louis County had the highest population (1.00M), followed by Jackson County (717.62K), and St. Charles County (406.42K).
The chart below shows the top 10 counties, and the table below shows the ranking of all Missouri counties.
You can see similar ranking information for related topics, and for other states. You can also see the ranking of all counties in the United States.
Related Topics: Missouri Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage), 2020 Census.
See this for other years:
Ranking of Missouri Counties By Population in 2020
Rank | County | Population |
|---|---|---|
| 1 | St. Louis County | 1,003,130 |
| 2 | Jackson County | 717,615 |
| 3 | St. Charles County | 406,417 |
| 4 | St. Louis city | 300,496 |
| 5 | Greene County | 299,328 |
| 6 | Clay County | 254,137 |
| 7 | Jefferson County | 226,937 |
| 8 | Boone County | 184,047 |
| 9 | Jasper County | 122,907 |
| 10 | Cass County | 108,161 |
| 11 | Platte County | 107,193 |
| 12 | Franklin County | 104,864 |
| 13 | Christian County | 89,285 |
| 14 | Buchanan County | 84,467 |
| 15 | Cape Girardeau County | 81,821 |
| 16 | Cole County | 76,621 |
| 17 | St. Francois County | 66,443 |
| 18 | Lincoln County | 59,854 |
| 19 | Newton County | 58,692 |
| 20 | Taney County | 56,062 |
| 21 | Johnson County | 54,031 |
| 22 | Pulaski County | 54,010 |
| 23 | Phelps County | 44,559 |
| 24 | Callaway County | 44,340 |
| 25 | Pettis County | 43,006 |
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