Saint Louis County , Missouri

County in Minnesota, United States

Saint Louis County, MO locator map
Location of Saint Louis County, MO 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.

The county has a total area of 6,859.88 square miles (17767 km2).

Saint Louis County map

Saint Louis County, MO Quick Facts

Population : 994,205 (2019)
Country : United States of America
State : Missouri
Different from : St. Louis
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 : 23:36:38 (11th April 2021)
Density : 56 Pop. per km² as of 2019
Population growth : -0.48% (2010-2019)

Saint Louis County, MO has 4 neighbors .

Year Population Method
2010 998,954 census
2011 1,000,040 estimation process
2012 1,000,761 estimation process
2013 1,000,456 estimation process
2014 1,000,528 estimation process
2015 1,001,109 estimation process
2016 997,837 estimation process
2017 996,227 estimation process
2018 995,219 estimation process
2019 994,205 estimation process

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

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

People born in Saint Louis County, MO (4)

Many people were born here, 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, MO.

Saint Louis County, MO Populated Places (more)

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

City Name Population Title
Castle Point 90,070 Non-metropolitan district in Essex, UK
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
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
Jennings 14,575 City in St.

Missouri Other Counties (more counties)

County Name Population Title
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 Non-metropolitan district in Essex, UK
O'Fallon 88,673 City in St.
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