Saint Clair County, Missouri
Saint Clair County: county in Missouri, United States
About
Saint Clair County is a county located in the U.S. state of Missouri. As of the 2010 census, the population was 9,805 and a population density of 5 people per km². After 10 years in 2020 county had an estimated population of 9,689 inhabitants. Its county seat is Osceola. The county was created 185 years ago in 1840.
County Snapshot
Saint Clair County at a glance
Saint Clair County currently has 7 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.
Mapped populated places
7
These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.
Missouri counties
115
Open related pagesLargest city
Appleton CityPopulation 1,080
Top linked places
Quick Facts about Saint Clair County
| Population | 9,689 (2020) |
| Country | United States of America |
| State | Missouri (United States) |
| Different from | St. Clair County, St. Clair County, St. Clair County |
| Area | 1818 km2 |
| Water as percent of area | 4.6% |
| Land as percent of area | 95.4% |
| Latitude & Longitude | 38.0372,-93.7760 |
| Named for | Arthur St. Clair |
| Capital | Osceola |
| Establishment | January 01, 1841 |
| Time Zone | America/Chicago |
| Local time | 21:54:57 (18th April 2026) |
| Density | 5 Pop. per km² as of 2020 |
| Population growth | -1.2% (2010-2020) |
Geography
Saint Clair County is located at 38°2'14"N 93°46'34"W (38.0371800, -93.7759800). It has 7 neighbors: Bates County, Benton County, Cedar County, Henry County, Hickory County, Polk and Vernon County.
Saint Clair County map
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The largest city of Saint Clair County is Appleton City with a population of 1,080. Other cities include, Osceola population 935, Lowry City population 613, Collins population 159 and Roscoe population 121. See all Saint Clair County cities & populated places.
Saint Clair County Populated Places
Cities, towns, neighborhoods & other populated places in Saint Clair County.
| City Name | Population | Title |
|---|---|---|
| Appleton City | 1,080 | City in St. |
| Osceola | 935 | City in St. |
| Lowry City | 613 | City in Saint Clair County, Missouri, United States |
| Collins | 159 | Human settlement in St. |
| Roscoe | 121 | Human settlement in St. |
| Vista | 47 | Human settlement in St. |
| Gerster | 24 | Village in the United States |
Official website of Saint Clair County
Official Website- Osceola
Demographics
According to census records, the population of Saint Clair County decreased by 1.2% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 9,805 | - | census |
| 2011 | 9,693 | -1.16% | estimation process |
| 2012 | 9,527 | -1.74% | estimation process |
| 2013 | 9,487 | -0.42% | estimation process |
| 2014 | 9,432 | -0.58% | estimation process |
| 2015 | 9,411 | -0.22% | estimation process |
| 2016 | 9,288 | -1.32% | estimation process |
| 2017 | 9,365 | 0.82% | estimation process |
| 2018 | 9,389 | 0.26% | estimation process |
| 2019 | 9,397 | 0.09% | estimation process |
| 2020 | 9,689 | 3.01% | estimation process |
Other places with the same name (3)
- Saint Clair County, Illinois The County of St. with a population of 258,046 people.
- Saint Clair County, Michigan county in Alabama, United States with a population of 159,293 people.
- Saint Clair County, Alabama county in Alabama, United States with a population of 90,739 people.
Missouri Other Counties (more counties)
| County Name | Population | Title |
|---|---|---|
| Saint Louis County | 994,020 | County in Minnesota, United States |
| Jackson County | 705,925 | County in Oregon, United States |
| Kansas City | 495,327 | The third most populous city in Missouri and the center of the Kansas City metropolitan area. |
| Saint Charles County | 406,204 | County in Missouri, United States |
| St. Louis | 315,685 | The second most populous city in Missouri and the center of the St. |
| Greene County | 294,997 | County in Tennessee, United States |
| Clay County | 253,463 | County in North Carolina, United States |
| Jefferson County | 226,543 | County in Missouri, United States |
| Boone County | 182,991 | County in West Virginia, United States |
| Columbia | 124,769 | The most populous city in the state of Missouri. |
| Jasper County | 121,648 | County in South Carolina, United States |
| Independence | 116,774 | A city in Jackson County, Missouri. |
| East Independence | 110,675 | A census-designated place in Jackson County, Missouri. |
| Cass County | 106,806 | County in Missouri, United States |
| Platte County | 106,532 | County in Wyoming, United States |
| Franklin County | 104,469 | County in Missouri, United States |