Saint Louis County, Missouri
Saint Louis County: county in Minnesota, United States
About
Saint Louis County is a county located in the U.S. state of Missouri. As of the 2010 census, the population was 998,954 and a population density of 56 people per km². After 10 years in 2020 county had an estimated population of 994,020 inhabitants. Its county seat is Duluth. The county was created 170 years ago in 1856.
County Snapshot
Saint Louis County at a glance
Saint Louis County currently has 91 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.
Mapped populated places
91
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
Castle PointPopulation 90,070
Top linked places
Quick Facts about Saint Louis County
| Population | 994,020 (2020) |
| Country | United States of America |
| State | Missouri (United States) |
| Different from | St. Louis, St. Louis County |
| Area | 17767 km2 |
| Water as percent of area | 8.9% |
| Land as percent of area | 91.1% |
| Latitude & Longitude | 38.6407,-90.4434 |
| Named for | Saint Louis River |
| Altitude | 541 feet / 165 meters |
| Capital | Duluth |
| Establishment | March 01, 1856 |
| Time Zone | America/Chicago |
| Local time | 13:35:50 (19th April 2026) |
| Density | 56 Pop. per km² as of 2020 |
| Population growth | -0.5% (2010-2020) |
| Weather | 66℉ Sunny 7-days weather |
Geography
Saint Louis County is located at 38°38'26"N 90°26'36"W (38.6406800, -90.4434100). It has 4 neighbors: Aitkin County, Carlton County, Koochiching County and Lake County.
Saint Louis County map
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The largest city of Saint Louis County is Castle Point with a population of 90,070. Other cities include, Florissant population 50,795, Chesterfield population 47,570, Oakville population 36,143 and Wildwood population 35,460. See all Saint Louis County cities & populated places.
Saint Louis County Populated Places (more)
Cities, towns, neighborhoods & other populated places in Saint Louis County.
| City Name | Population | Title |
|---|---|---|
| Castle Point | 90,070 | A census-designated place in Jefferson County, Missouri. |
| Florissant | 50,795 | The most populous city in St. |
| Chesterfield | 47,570 | A city in St. |
| Oakville | 36,143 | City in Halton Region, Ontario |
| Wildwood | 35,460 | City in New Jersey |
| University City | 34,165 | Suburb in St. |
| Ballwin | 30,094 | City in Saint Louis County, Missouri, United States |
| Mehlville | 28,380 | Census designated place |
| Kirkwood | 27,866 | Suburb of St. |
| Maryland Heights | 26,895 | City in Missouri, United States |
| Hazelwood | 25,042 | Suburb city of St. |
| Webster Groves | 22,896 | City in Missouri |
| Ferguson | 20,457 | Town in St. |
| Affton | 20,307 | Census designated place |
| Spanish Lake | 19,650 | Census designated place |
| Creve Coeur | 18,624 | City in St. |
Official website of Saint Louis County
Official WebsiteDemographics
According to census records, the population of Saint Louis County decreased by 0.5% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 998,954 | - | census |
| 2011 | 1,000,040 | 0.11% | estimation process |
| 2012 | 1,000,761 | 0.07% | estimation process |
| 2013 | 1,000,456 | -0.03% | estimation process |
| 2014 | 1,000,528 | 0.01% | estimation process |
| 2015 | 1,001,109 | 0.06% | estimation process |
| 2016 | 997,837 | -0.33% | estimation process |
| 2017 | 996,227 | -0.16% | estimation process |
| 2018 | 995,219 | -0.1% | estimation process |
| 2019 | 994,205 | -0.1% | estimation process |
| 2020 | 994,020 | -0.02% | estimation process |
People born in Saint Louis County (4)
People born in Saint Louis County, including former US senior policy advisor, convicted fraudster John C. Beale, mathematician Vernon Bakke, politician Robert O. Ashbach, .
More notable people
- James E. Ulland he was born in 01/01/1942
Other places with the same name (1)
- Saint Louis County, Minnesota county in Minnesota, United States with a population of 198,538 people.
Missouri Other Counties (more counties)
| County Name | Population | Title |
|---|---|---|
| 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 |
| Lee's Summit | 101,467 | The most populous city in Jackson County, Missouri. |