Saint Charles County , Missouri

County in Missouri, United States

Saint Charles County, MO locator map
Location of Saint Charles County, MO on Missouri map.


Saint Charles County is a county located in the U.S. state of Missouri. As of the 2010 census, the population was 360,485 and a population density of 235 people per km². After 9 years in 2019 county had an estimated population of 402,022 inhabitants. Its county seat is St. Charles. The county was created 209 years ago in 1811.

The county has a total area of 592.28 square miles (1534 km2).

Saint Charles County map

Saint Charles County, MO Quick Facts

Population : 402,022 (2019)
Country : United States of America
State : Missouri
Different from : St. Charles Parish
Area : 1534 km2
Water as percent of area : 5.4%
Land as percent of area : 94.6%
Named for : Charles Borromeo
Altitude : 623 feet / 190 meters
Capital : St. Charles
Establishment : January 01, 1812
Time Zone : America/Chicago
Local time : 23:21:04 (11th April 2021)
Density : 262 Pop. per km² as of 2019
Population growth : 10.33% (2010-2019)

Saint Charles County, MO has 3 neighbors .

  • St. Charles

Year Population Method
2010 360,485 census
2011 365,582 estimation process
2012 369,111 estimation process
2013 374,288 estimation process
2014 379,844 estimation process
2015 384,978 estimation process
2016 390,541 estimation process
2017 395,130 estimation process
2018 398,780 estimation process
2019 402,022 estimation process

The population of Saint Charles County increased by 10.33% in 9 years.

Comte de Saint Charles, Comté de Saint Charles, Saint Charles

People born in Saint Charles County, MO (6)

Many people were born here, including baseball player Ken Heintzelman, 3rd Chief of Staff of the United States Army John C. Bates, soccer player-coach Wendy Dillinger, you can see a list of people who born in Saint Charles County, MO.

Saint Charles County, MO Populated Places (more)

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

City Name Population Title
O'Fallon 88,673 City in St.
Saint Charles 71,028 City in St.
Saint Peters 58,212 City in Missouri
Wentzville 41,784 City
Lake Saint Louis 16,864 City
Dardenne Prairie 13,348 City
Cottleville 5,608 City
Weldon Spring 5,533 City
Saint Paul 2,574 City in St.
Foristell 606 City
West Alton 527 City
New Melle 508 City
Josephville 476 Human settlement in St.
Portage Des Sioux 328 City in St.
Augusta 267 City in St.
Weldon Spring Heights 90 Village in the United States

Missouri Other Counties (more counties)

County Name Population Title
Saint Louis County 994,205 County in Minnesota, United States
Jackson County 703,011 County in Oregon, United States
Kansas City 495,327 Largest municipality in the U.
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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