St. Charles County
St. Charles County Courthouse in St. Charles
St. Charles County Courthouse in St. Charles
Flag of St. Charles County
Map of Missouri highlighting St. Charles County
Location within the U.S. state of Missouri
Map of the United States highlighting Missouri
Missouri's location within the U.S.
Coordinates: 38°45′36″N 90°37′00″W / 38.76°N 90.6167°W / 38.76; -90.6167
Country United States
State Missouri
FoundedOctober 1, 1812
Named forCharles Borromeo
SeatSt. Charles
Largest cityO'Fallon
Government
  County executiveSteve Ehlmann (R)
Area
  Total593 sq mi (1,540 km2)
  Land560 sq mi (1,500 km2)
  Water32 sq mi (80 km2)  5.4%
Population
 (2020)
  Total405,262
  Density680/sq mi (260/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional districts2nd, 3rd
Websitewww.sccmo.org

St. Charles County is in the central eastern part of the U.S. state of Missouri. As of the 2020 census, the population was 405,262,[1] making it Missouri's third-most populous county. Its county seat is St. Charles.[2] The county was organized October 1, 1812, and named for Saint Charles Borromeo, an Italian cardinal.

St. Charles County is part of the St. Louis, MO-IL Metropolitan Statistical Area and contains many of the city's northwestern suburbs. The wealthiest county in Missouri,[3] St. Charles County is one of the nation's fastest-growing counties.

St. Charles County includes a part of the Augusta AVA, an area of vineyards and wineries designated by the federal government in 1980 as the first American Viticultural Area.[4] The county's rural outer edge along the south-facing bluffs above the Missouri River, is also part of the broader Missouri Rhineland.

History

The County of St. Charles was originally called the District of St. Charles and had no definite limits until 1816 to 1818 when neighboring counties were formed.[5] The borders of St. Charles are the same today as they were in 1818.[6]

Geography

St. Charles County is the only known habitat of the threatened decurrent false aster in Missouri.[7]

According to the U.S. Census Bureau, the county has a total area of 593 square miles (1,540 km2), of which 560 square miles (1,500 km2) is land and 32 square miles (83 km2) (5.4%) is water.[8]

The highest elevation is 901 feet (275 m) northwest of Augusta near Femme Osage Creek headwaters.[9]

Adjacent counties

Major highways

  • I-64 – Major freeway in the western portion of the county. Originally U.S. Route 40, the highway was upgraded to Interstate standards in the late 2000s. The highway was re-signed as Interstate 64 from the Daniel Boone Bridge to Interstate 70 in Wentzville in 2009.
  • I-70 – The major east–west thoroughfare in the county. It is mostly a six-lane freeway in the county, but there are sections in St. Charles and St. Peters where the Interstate widens to 11 lanes of traffic.
  • Interstate 70 Business
  • US-40
  • US-61
  • US-67
  • Rte-79
  • Rte-94
  • Rte-364 – A freeway in the southern and central portions of the county that begins at Interstate 270 in western St. Louis County and ends at Interstate 64 in Lake St. Louis.
  • Rte-370 – A six-lane freeway that connects Interstate 70 in St. Charles County and Interstate 270 in St. Louis County.

National protected area

Climate

Saint Charles County
Climate chart (explanation)
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2.6
 
 
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72
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Average max. and min. temperatures in °F
Precipitation totals in inches
Source:[10]
Metric conversion
J
F
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66
 
 
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7
 
 
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76
 
 
4
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Average max. and min. temperatures in °C
Precipitation totals in mm

Demographics

Historical population
CensusPop.Note
18103,505
18203,97013.3%
18304,3208.8%
18407,91183.1%
185011,45444.8%
186016,52344.3%
187021,30428.9%
188023,0658.3%
189022,977−0.4%
190024,4746.5%
191024,6950.9%
192022,828−7.6%
193024,3546.7%
194025,5625.0%
195029,83416.7%
196052,97077.5%
197092,95475.5%
1980144,10755.0%
1990212,90747.7%
2000283,88333.3%
2010360,48527.0%
2020405,26212.4%
U.S. Decennial Census[11]
1790–1960[12] 1900–1990[13]
1990–2000[14] 2010–2020[15]

As of 2020, there were 405,262 people and 150,668 households residing in the county. The population density was 643 inhabitants per square mile (248/km2). There were 161,144 housing units. The racial makeup of the county was 83.8% White, 5.2% African American, 0.1% Native American, 2.8% Asian, 0.1% Pacific Islander, and 6.5% from two or more races. Hispanic or Latino made up 4.0% of the population.[16]

There were 101,663 households, out of which 40.50% had children under the age of 18 living with them, 63.20% were married couples living together, 9.20% have a woman whose husband does not live with her, and 24.20% were non-families. 19.40% of all households were made up of individuals, and 5.90% had someone living alone who was 65 years of age or older. The average household size was 2.76 and the average family size was 3.18.

In the county, the population was spread out in age, with 29.00% under the age of 18, 8.20% from 18 to 24, 32.60% from 25 to 44, 21.60% from 45 to 64, and 8.80% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 97.10 males. For every 100 females age 18 and over, there were 94.10 males.

The median income for a household in the county was $71,458, and the median income for a family was $64,415. Males had a median income of $44,528 versus $29,405 for females. The per capita income for the county was $23,592. 4.00% of the population and 2.80% of families were below the poverty line. Out of the total people living in poverty, 4.90% are under the age of 18 and 5.10% are 65 or older.

St. Charles County has had one of the fastest-growing populations in the state for many decades, with 55% growth in the 1970s, 48% in the 1980s, 33% in the 1990s, and another 27% in the 2000s. The county sits at a cross-section of industry, as well as extensive retail and some agriculture. With the Missouri River on the south and east and the Mississippi River on the north, the county is bisected east to west by Interstate 70. After St. Charles Airport closed in 2010, the county has one remaining small airport, St. Charles County Smartt Airport. Two ferries cross the Mississippi River from St. Charles County.

Racial composition2010[17]2018[18]
White91.3%89.9%
—Non-Hispanic89.1%86.9%
Black or African American4.4%5.1%
Hispanic or Latino (of any race)2.9%3.4%
Asian2.3%2.7%
Two or More Races1.6%2.0%

2020 Census

St. Charles County Racial Composition[19]
Race Num. Perc.
White (NH) 335,879 82.9%
Black or African American (NH) 20,672 5.1%
Native American (NH) 623 0.15%
Asian (NH) 11,068 2.73%
Pacific Islander (NH) 199 0.05%
Other/Mixed (NH) 20,810 5.13%
Hispanic or Latino 16,011 4%

Education

Public schools

School districts include:[20]

High schools (all grades 9–12):

  • Fort Zumwalt District
  • Francis Howell District
  • Orchard Farm District
  • St. Charles District
  • Wentzville District

Private schools

  • Academy of the Sacred Heart – St. Charles – (PK-08) Roman Catholic
  • All Saints School – St. Peters – (K-08) – Roman Catholic
  • Assumption Catholic Grade School – O'Fallon – (K-08) – Roman Catholic
  • Christian High School– O'Fallon and St. Peters– (PK-12) – Non-denominational Christian
  • Duchesne High School– St. Charles– (09-12)– Roman Catholic
  • First Baptist Christian Academy – O'Fallon – (PK-07) – Non-denominational Christian
  • Foristell Baptist Academy Foristell – (K-09) Baptist
  • Hope Montessori Academy Lake St. Louis – (PK-K) – Nonsectarian
  • Immaculate Conception Catholic School – Dardenne Prairie – (K-08) – Roman Catholic
  • Immanuel Lutheran School – St. Charles – (PK-08) Lutheran
  • Immanuel Lutheran School – Wentzville – (PK-08) – Lutheran
  • Liberty Classical School – O'Fallon – (07-12) – Non-denominational Christian
  • Lutheran High School of St. Charles County – St. Peters – (09-12) – Lutheran
  • Messiah Lutheran School – Weldon Spring – (PK-08) – Lutheran
  • Mid Rivers Seventh-day Adventist School – St. Peters – (03-08) Seventh-day Adventist
  • St. Charles Borromeo – St. Charles – (K-08) – Roman Catholic
  • St. Cletus School – St. Charles – (K-08) – Roman Catholic
  • St. Dominic High School – O'Fallon – (09-12) – Roman Catholic
  • St. Elizabeth St. Robert Regional School – St. Charles – (PK-08) – Roman Catholic
  • St. Joseph School Cottleville – (K-08) – Roman Catholic
  • St. Joseph School – Wentzville – (PK-08) – Roman Catholic
  • St. Patrick Elementary School – Wentzville – (K-08) – Roman Catholic
  • St. Paul Elementary School – St. Paul – (PK-08) – Roman Catholic
  • St. Peter Catholic School – St. Charles – (PK-08) – Roman Catholic
  • St. Theodore School – Wentzville – (K-08) – Roman Catholic
  • Sts. Joachim & Ann School – St. Charles – (PK-08) – Roman Catholic
  • Trinity Lutheran School – St. Charles – (01-08) – Lutheran
  • Willott Road Christian Academy – St. Peters – (NS-09) – Baptist
  • Zion Lutheran School – St. Charles – (PK-08) – Lutheran

Alternative schools

  • Boonslick State School – St. Peters – Special Education
  • Fort Zumwalt Hope High School – O'Fallon – Other/Alternative School – (09-12)
  • Francis Howell Union High School – St. Charles – Other/Alternative School – (09-12)
  • Heritage Landing – St. Peters – Other/Alternative School – (06-12)
  • The Lead School – O'Fallon – Other/Alternative School – (K-12)
  • Lewis & Clark Career Center – St. Charles – Vocational/Technical School – (09-12)
  • Quest Day Treatment Center – St. Charles – Other/Alternative School – (06-12)
  • Success Campus – St. Charles – Other/Alternative School – (09-12)

Higher education

Public libraries

Government

St. Charles County is governed by a county executive and a county council. The county council consists of seven members, each elected from various districts in the county. The county executive is elected by the entire county. The current executive is Steve Ehlmann. He was preceded by Joe Ortwerth, who was preceded by Gene Schwendemann, the first county executive of St. Charles County under the new form of government. The executive under the old form of county government was termed a "judge." The county had 258,525 registered voters as of March 2016.[22]

St. Charles County Ambulance District (SCCAD) is the largest such district in Missouri, serving all of St. Charles County and its population of nearly 370,000.

Law enforcement

The St. Charles County Sheriff's Department (SCCSD) is responsible for court services and security, prisoner transport, civil process, and bailiffs. Until the end of 2014, SCCSD was the primary law enforcement agency serving unincorporated areas of St. Charles County. On January 1, 2015, the St. Charles County Police Department was established and assumed that responsibility.[23] It should not be confused with the St. Charles City Police Department. The St. Charles County Regional SWAT Team is made up of officers from each county law enforcement agency.

The SCCSD Aviation Unit is part of a multi-jurisdictional unit known as the Metro Air Support Unit, with the Metropolitan Police Department, City of St. Louis, St. Louis County Police Department, and St. Charles County Sheriff's Department. In 2007, the fleet included six helicopters, one fixed-wing airplane, six pilots, and eight crew chiefs.[24]

In May 2022, Ryan Keuhner, who was then an SCCSD deputy, shot and killed his neighbor's 3-year-old rescue dog with a pellet gun. The shooting was reportedly unprovoked and Keuhner was off duty at the time. Video of the dog's owner confronting Keuhner was uploaded online, and later gained national coverage. Keuhner resigned in June 2022 and was charged with a class A misdemeanor for animal abuse.[25][26]

Library resolution

In 2023, the county council issued a resolution aimed at library policies and staff online activities. The resolution followed protests and comments at council meetings from residents who complained about a staff member wearing gender non-conforming clothes. Within the resolution, the council asked the library CEO to remove an article they shared on their personal LinkedIn profile related to conservative campaigns targeting public libraries and freedom of speech.[27]

Politics

Local

The Republican Party predominantly controls politics at the local level in St. Charles County. Republicans hold all the elected positions in the county.[28][29][30]

PositionIncumbentParty
Assessor Scott Shipman Republican
Collector Michelle McBride Republican
Council Member – District 1 Matt Swanson Republican
Council Member – District 2 Joseph Brazil Republican
Council Member – District 3 Michael Elam Republican
Council Member – District 4 David Hammond Republican
Council Member – District 5 Terry Hollander Republican
Council Member – District 6 Nancy Schneider Republican
Council Member – District 7 Tim Baker Republican
County Executive Steve Ehlmann Republican
Director of Elections Kurt Bahr Republican
Prosecuting Attorney Tim Lohmar Republican[31]
Recorder Mary Dempsey Republican
Sheriff Scott Lewis Republican

State

Past Gubernatorial Elections Results
Year Republican Democratic Third Parties
2020 58.12% 128,230 39.84% 87,888 2.04% 4,496
2016 54.52% 103,946 42.58% 85,704 2.90% 5,836
2012 48.58% 89,144 48.97% 89,860 2.45% 4,486
2008 44.51% 82,440 53.84% 99,705 1.65% 3,058
2004 55.90% 91,323 42.96% 70,184 1.14% 1,865
2000 58.24% 74,357 39.49% 50,415 2.27% 2,907
1996 49.48% 47,886 48.01% 46,462 2.50% 2,424

St. Charles County is divided among eleven legislative districts in the Missouri State House of Representatives, all of which are held by Republicans.

  • District 63 – Tricia Byrnes (R-Wentzville, since 2023). Consists of most of Wentzville.
  • District 64 Tony Lovasco (R-O'Fallon, since 2019). Consists of Flint Hill, Josephville, St. Paul, and parts of Foristell, O'Fallon, and Wentzville.
  • District 65 – Wendy Hausman (R-St. Peters, since 2023). Consists of West Alton, Portage Des Sioux, and parts of Cottleville, St. Charles, and St. Peters.
  • District 69 Adam Schnelting (R-St. Charles, since 2019). Consists of parts of St. Peters and Weldon Spring.
  • District 102 Richard West (R-Wentzville, since 2019). Consists of Augusta, Defiance, New Melle, Weldon Springs Heights, and parts of Cottleville, O'Fallon, St. Peters, and Weldon Spring.
  • District 103 – Dave Hinman (R-O'Fallon, since 2023). Consists of part of O'Fallon.
  • District 104 Phil Christofanelli (R-St. Charles, since 2019). Consists of part of St. Charles and St. Peters.
  • District 105 Adam Schwadron (R-St. Charles, since 2021). Consists of part of St. Charles.
  • District 106 – Travis Wilson (R-St. Charles, since 2023). Consists of part of St. Charles.
  • District 107 Mark Matthiesen (R-O'Fallon, since 2023). Consists of parts of Dardenne Prairie and O'Fallon.
  • District 108 Justin Hicks (R-Lake St. Louis, since 2023). Consists of Lake St. Louis and parts of Dardenne Prairie and O'Fallon.

St. Charles County is divided into three districts in the Missouri State Senate, each of which are represented by Republicans.

  • District 2 Nick Schroer (R-Defiance, since 2023). Consists of the communities of Augusta, Cottleville, Dardenne Prairie, Defiance, Josephville, Lake St. Louis, New Melle, O'Fallon, St. Paul, Weldon Spring, and Weldon Spring Heights.
  • District 10 - Travis Fitzwater (R-New Bloomfield, since 2023). Consists of the communities of Flint Hill, Foristell, and Wentzville.
  • District 23 Bill Eigel (R-Weldon Spring, since 2017). Consists of Portage Des Sioux, St. Charles, St. Peters, and West Alton.

Federal

Missouri is represented in the U.S. Senate by Josh Hawley and Eric Schmitt, whose most recent election results from the county are included here.

U.S. Senate — Missouri — (2022)[32]
Party Candidate Votes %
Republican Eric Schmitt 83,559 55.35%
Democratic Trudy Busch Valentine 64,552 42.76%
Libertarian Jonathan Dine 2,158 1.43%
Constitution Paul Venable 709 0.47%
Total votes 150,978 100.00%
U.S. Senate — Missouri — (2018)[33]
Party Candidate Votes %
Republican Josh Hawley 93,172 52.90%
Democratic Claire McCaskill 77,973 44.30%
Independent Craig O'Dear 2,393 1.40%
Libertarian Japheth Campbell 1,836 1.0%
Green Jo Crain 731 0.4%
Total votes 176,105 100%
U.S. Senate — Missouri — (2016)
Party Candidate Votes % ±%
Republican Roy Blunt 103,946 51.78% +6.87
Democratic Jason Kander 88,238 43.95% -5.18
Libertarian Jonathan Dine 5,238 2.61% -3.35
Green Johnathan McFarland 1,970 0.98% +0.98
Constitution Fred Ryman 1,355 0.67% +0.67
U.S. Senate — Missouri — (2012)[34]
Party Candidate Votes %
Democratic Claire McCaskill 89,993 49.10%
Republican Todd Akin 82,278 44.90%
Libertarian Jonathan Dine 10,924 6.0%
U.S. Senate — Missouri — (2010)[35]
Party Candidate Votes %
Republican Roy Blunt 73,695 59.09%
Democratic Robin Carnahan 43,955 35.24%
Libertarian Jonathan Dine 10,924 6.0%

Part of St. Charles County is included in Missouri's 2nd Congressional District and is currently represented by Ann Wagner in the U.S. House of Representatives.

U.S. House of Representatives — Missouri's 2nd Congressional District — St. Charles County (2020)
Party Candidate Votes % ±%
Republican Ann Wagner 45,941 57.38%
Democratic Jill Schupp 31,239 39.02%
Libertarian Martin Schulte 2,821 3.52%
U.S. House of Representatives — Missouri's 2nd Congressional District — St. Charles County (2018)[33]
Party Candidate Votes % ±%
Republican Ann Wagner 37,875 57.5%
Democratic Cort VanOstran 26,782 40.6%
Libertarian Tony Kirk 956 1.5%
Green David Arnold 304 0.5%
Independent Ken Newhouse (write-in) 0 0.0%
Total votes 65,917 100.0%
Republican hold

Most of St. Charles County is included in Missouri's 3rd Congressional District and is currently represented by Blaine Luetkemeyer (R-St. Elizabeth) in the U.S. House of Representatives.

U.S. House of Representatives — Missouri's 3rd Congressional District — St. Charles County (2020)
Party Candidate Votes % ±%
Republican Blaine Luetkemeyer 84,071 61.74%
Democratic Megan Rezabek 49,315 36.22%
Libertarian Leonard J Steinman II 2,631 1.93%
U.S. House of Representatives — Missouri's 3rd Congressional District — St. Charles County (2018)[33]
Party Candidate Votes % ±%
Republican Blaine Luetkemeyer 61,751 57.77%
Democratic Katy Geppert 43,070 40.30%
Libertarian Donald V. Stolle 2,062 1.93%
Total votes 106,883 100.0%
Republican hold
United States presidential election results for St. Charles County, Missouri[36]
Year Republican Democratic Third party
No.%No.%No.%
2020 128,389 57.69% 89,530 40.23% 4,647 2.09%
2016 121,650 59.87% 68,626 33.78% 12,908 6.35%
2012 110,784 59.44% 71,838 38.55% 3,744 2.01%
2008 102,550 54.27% 84,183 44.55% 2,224 1.18%
2004 95,826 58.61% 66,855 40.89% 807 0.49%
2000 72,114 56.04% 53,806 41.81% 2,766 2.15%
1996 47,705 46.66% 41,369 40.46% 13,172 12.88%
1992 38,673 36.29% 37,263 34.97% 30,627 28.74%
1988 50,005 62.90% 29,286 36.84% 209 0.26%
1984 47,784 73.06% 17,617 26.94% 0 0.00%
1980 36,050 60.32% 20,668 34.58% 3,050 5.10%
1976 26,105 53.60% 22,063 45.30% 536 1.10%
1972 25,677 69.94% 11,034 30.06% 0 0.00%
1968 13,533 45.63% 10,374 34.98% 5,752 19.39%
1964 9,020 38.30% 14,530 61.70% 0 0.00%
1960 10,888 47.80% 11,890 52.20% 0 0.00%
1956 9,462 55.40% 7,618 44.60% 0 0.00%
1952 8,451 56.48% 6,493 43.39% 20 0.13%
1948 5,976 49.54% 6,049 50.14% 39 0.32%
1944 7,050 58.92% 4,880 40.78% 36 0.30%
1940 7,792 59.14% 5,334 40.48% 50 0.38%
1936 5,156 42.72% 5,903 48.91% 1,009 8.36%
1932 3,664 34.12% 6,911 64.37% 162 1.51%
1928 5,404 51.43% 5,081 48.36% 22 0.21%
1924 4,668 59.11% 2,364 29.94% 865 10.95%
1920 6,645 72.13% 2,472 26.83% 96 1.04%
1916 3,518 64.16% 1,914 34.91% 51 0.93%
1912 2,350 49.00% 1,792 37.36% 654 13.64%
1908 3,480 62.84% 1,979 35.73% 79 1.43%
1904 3,203 62.91% 1,788 35.12% 100 1.96%
1900 3,324 58.10% 2,343 40.95% 54 0.94%
1896 3,173 56.15% 2,448 43.32% 30 0.53%
1892 2,522 50.00% 2,485 49.27% 37 0.73%
1888 2,668 52.65% 2,381 46.99% 18 0.36%

2016 Missouri presidential primary results

Republican

Donald Trump won the most votes in St. Charles County, with 41.50 percent. U.S. Senator Ted Cruz (R-Texas) came in second with 38.87 percent, Governor John Kasich (R-Ohio) placed third with 10.70 percent, and U.S. Senator Marco Rubio (R-Florida) was fourth with 7.10 percent.

Democratic

U.S. Senator Bernie Sanders (I-Vermont) won the primary with 54.32 percent to former Secretary of State Hillary Clinton's 44.80 percent.

2012 Missouri presidential primary results

Republican

Former U.S. Senator Rick Santorum (R-Pennsylvania) won the most votes in St. Charles County, with 56.29 percent. Former Governor Mitt Romney (R-Massachusetts) came in second with 25.43 percent, and former U.S. Representative Ron Paul (R-Texas) was third with 12.69 percent.

Democratic

With incumbent President Barack Obama facing no serious opposition, few St. Charles County voters voted in the Democratic primary; Obama won 87.83 percent.

2008 Missouri presidential primary results

Republican

Former Governor Mitt Romney (R-Massachusetts) won the most votes in St. Charles County, with 37.72 percent. U.S. Senator John McCain (R-Arizona) came in second with 34.95 percent, former Governor Mike Huckabee (R-Arkansas) placed third with 21.83 percent, and U.S. Representative Ron Paul (R-Texas) was fourth with 3.83 percent.

Democratic

Former U.S. Senator Hillary Clinton (D-New York) received a total of 23,611 votes, more than any candidate from either party in St. Charles County during the 2008 presidential primary.

Communities

Cities

Villages

Census-designated place

Other unincorporated places

Islands

Subregions

Westplex

Westplex is an area within St. Charles County in east-central Missouri to the west of St. Louis County.[37]

The Westplex is part of St. Charles County that used to be called "The Golden Triangle". The "triangle" was formed by I-70 to the north, Missouri Route 94 to the southeast, and I-64 to the southwest. Since almost all of the growth in St. Charles County was within this triangle it was dubbed the "Golden" area of St. Charles county, hence, Golden Triangle. Today the Westplex is made up of St. Charles, St. Peters, Weldon Spring, Cottleville, Dardenne Prairie, O'Fallon, Lake St. Louis, and Wentzville.

See also

References

  1. "2020 U.S. Census". United States Census Bureau.
  2. "Find a County". National Association of Counties. Retrieved June 7, 2011.
  3. "County-Level Unemployment and Median Household Income for Missouri". www.ers.usda.gov. USDA Economic Research Service. Retrieved March 30, 2009.
  4. Pingelton, Tim (December 8, 2005). "The Soul of Augusta". Appellation American. Archived from the original on July 24, 2008.
  5. Bryan, William S. (1993). St. Charles Co., Missouri: biographical sketches from pioneer families of Missouri by Bryan and Rose. Baltimore, Maryland: Genealogical Publishing Company. p. 1.
  6. "MO: Individual County Chronology". Newberry. Retrieved October 8, 2020.
  7. "Decurrent False Aster". Field Guide. Missouri Dept. of Conservation. Retrieved September 2, 2015.
  8. "2010 Census Gazetteer Files". United States Census Bureau. August 22, 2012. Archived from the original on October 21, 2013. Retrieved November 20, 2014.
  9. USGS 1/3 Arc Second NED
  10. "NASA Earth Observations Data Set Index". NASA. Archived from the original on May 11, 2020. Retrieved January 30, 2016.
  11. "U.S. Decennial Census". United States Census Bureau. Retrieved November 20, 2014.
  12. "Historical Census Browser". University of Virginia Library. Retrieved November 20, 2014.
  13. "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved November 20, 2014.
  14. "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. Retrieved November 20, 2014.
  15. "2020 Population and Housing State Data". U.S. Census Bureau. Retrieved August 28, 2021.
  16. "St. Charles County, Missouri". United States Census Bureau. Retrieved January 9, 2022.
  17. "American Fact Finder". U.S. Census.
  18. "QuickFacts. St. Charles County, Missouri". United States Census Bureau. Retrieved August 9, 2019.
  19. "P2 Hispanic or Latino, and Not Hispanic or Lationo by Race – 2020: DEC Redistricting Data (PL 94-171) – St. Charles County, Missouri".
  20. "2020 Census - School District Reference Map: St. Charles County, MO" (PDF). U.S. Census Bureau. Retrieved July 22, 2022. - Text list
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