Saint Louis County , Missouri

Saint Louis County: County in Minnesota, United States

Saint Louis County locator map
Location of Saint Louis County on Missouri map.


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 9 years in 2019 county had an estimated population of 994,205 inhabitants. Its county seat is Duluth. The county was created 165 years ago in 1856.


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.

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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 50,952, Chesterfield population 47,538, Wildwood population 35,432 and University City population 34,165. See all Saint Louis County cities & populated places.

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Saint Louis County map

Saint Louis County Quick Facts

Population : 994,205 (2019)
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%
Named for : Saint Louis River
Altitude : 541 feet / 165 meters
Capital : Duluth
Establishment : March 03, 1856
Time Zone : America/Chicago
Local time : 23:52:31 (24th June 2021)
Density : 56 Pop. per km² as of 2019
Population growth : -0.48% (2010-2019)

Saint Louis County has 4 neighbours.


According to census records, the population of Saint Louis County decreased by 0.48% in 9 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

Comte de Saint Louis, Comté de Saint Louis, Saint Louis

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, you can see a list of people who born in Saint Louis County.

Other places with the same name (1)

Saint Louis County Populated Places (more)

Cities, Towns, Neighborhoods & Other Populated Places in Saint Louis County.

City Name Population Title
Castle Point 90,070 Census designated place in St.
Florissant 50,952 City in St.
Chesterfield 47,538 City in St.
Wildwood 35,432 City in New Jersey
University City 34,165 Suburb in St.
Ballwin 30,082 City in Saint Louis County, Missouri, United States
Kirkwood 27,807 Suburb of St.
Maryland Heights 26,956 City in Missouri, United States
Hazelwood 25,117 Suburb city of St.
Webster Groves 22,819 City in Missouri
Ferguson 20,525 Town in St.
Creve Coeur 18,622 City in St.
Manchester 18,073 City in Missouri
Clayton 16,747 Inner-ring suburb of St.
Overland 15,551 City in Saint Louis County, Missouri, United States
Jennings 14,575 City in St.

Missouri Other Counties (more counties)

County Name Population Title
Missouri 6,137,428 State of the United States of America
Jackson County 703,011 County in Oregon, United States
Kansas City 495,327 Largest municipality in the U.
Saint Charles County 402,022 County in Missouri, United States
St. Louis 315,685 City in Missouri, United States
Greene County 293,086 County in Tennessee, United States
Clay County 249,948 County in North Carolina, United States
Jefferson County 225,081 County in Missouri, United States
Boone County 180,463 County in West Virginia, United States
Columbia 123,195 City in Missouri, United States
Jasper County 121,328 County in South Carolina, United States
Cass County 105,780 County in Missouri, United States
Platte County 104,418 County in Wyoming, United States
Franklin County 103,967 County in Missouri, United States
Lee's Summit 99,357 City in Missouri, United States
Castle Point 90,070 Census designated place in St.

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