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St. Charles County, Missouri Population 2021
St. Charles County, Missouri's estimated population is 408,506 with a growth rate of 0.80% in the past year according to the most recent United States census data. St. Charles County, Missouri is the 4th largest county inMissouri. The 2010 Population was 361,803 and has seen a growth of 12.91% since this time.
Note: 2020 and 2021 data is projected
| Year | Population | Growth | Annual Growth Rate |
|---|---|---|---|
| 2021 | 408,506 | 3,242 | 0.80% |
| 2020 | 405,264 | 3,242 | 0.81% |
| 2019 | 402,022 | 3,242 | 0.81% |
| 2018 | 398,780 | 3,650 | 0.92% |
| 2017 | 395,130 | 4,589 | 1.18% |
| 2016 | 390,541 | 5,563 | 1.45% |
| 2015 | 384,978 | 5,134 | 1.35% |
| 2014 | 379,844 | 5,556 | 1.48% |
| 2013 | 374,288 | 5,177 | 1.40% |
| 2012 | 369,111 | 3,529 | 0.97% |
| 2011 | 365,582 | 3,779 | 1.04% |
| 2010 | 361,803 | 148,896 | 69.93% |
| 1990 | 212,907 | 68,800 | 47.74% |
| 1980 | 144,107 | 51,153 | 55.03% |
| 1970 | 92,954 | 39,984 | 75.48% |
| 1960 | 52,970 | 23,136 | 77.55% |
| 1950 | 29,834 | 4,272 | 16.71% |
| 1940 | 25,562 | 1,208 | 4.96% |
| 1930 | 24,354 | 1,526 | 6.68% |
| 1920 | 22,828 | -1,867 | -7.56% |
| 1910 | 24,695 | 221 | 0.90% |
| 1900 | 24,474 | 1,497 | 6.52% |
| 1890 | 22,977 | -88 | -0.38% |
| 1880 | 23,065 | 1,761 | 8.27% |
| 1870 | 21,304 | 4,781 | 28.94% |
| 1860 | 16,523 | 5,069 | 44.26% |
| 1850 | 11,454 | 3,543 | 44.79% |
| 1840 | 7,911 | 3,591 | 83.13% |
| 1830 | 4,320 | 350 | 8.82% |
| 1820 | 3,970 | 465 | 13.27% |
| 1810 | 3,505 | 0.00% |
2021 Growth Rate
0.80% (3,242)
County Website
State
Founded
October 1, 1812
County Seat
Lat./Long.
2010 Population
361,803
Growth Since 2010
12.91% (46,703)
St. Charles County, Missouri Population Growth
| Race | Population | Percentage |
|---|---|---|
| White | 353,297 | 89.60% |
| Black or African American | 17,468 | 4.43% |
| Asian | 10,183 | 2.58% |
| Two or More Races | 10,147 | 2.57% |
| Some Other Race | 2,416 | 0.61% |
| American Indian and Alaska Native | 641 | 0.16% |
| Native Hawaiian and Other Pacific Islander | 138 | 0.03% |
St. Charles County, Missouri Population by Race
St. Charles County, Missouri Population Pyramid $2021
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St. Charles County, Missouri Population by Age
St. Charles County, Missouri Households and Families
| Type | Count | Average Size | Owned |
|---|---|---|---|
| All | 146,631 | 2.64 | 80.6 |
| Married | 86,146 | 3.18 | 91 |
| Non Family | 41,499 | 1.24 | 64.3 |
| Female | 13,425 | 3.22 | 66.6 |
| Male | 5,561 | 3.19 | 75.6 |
3.13
Average Family Size
2.64
Average Household Size
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St. Charles County, Missouri Households by Type
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| Education Attained | Count | Percentage |
|---|---|---|
| Less Than 9th Grade | 3,618 | 1.35% |
| 9th to 12th Grade | 10,335 | 3.86% |
| High School Graduate | 65,883 | 24.60% |
| Some College | 59,216 | 22.11% |
| Associates Degree | 24,672 | 9.21% |
| Bachelors Degree | 66,222 | 24.73% |
| Graduate Degree | 37,852 | 14.13% |
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St. Charles County, Missouri Educational Attainment by Sex (over 25)
St. Charles County, Missouri Educational Attainment by Race
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| Race | Total | High School | Bachelors |
|---|---|---|---|
| White | 239,067 | 227,607 | 91,510 |
| Black | 11,350 | 10,747 | 4,561 |
| Asian | 6,929 | 6,222 | 4,275 |
| Hispanic | 6,739 | 5,724 | 2,302 |
| 2+ Races | 3,703 | 3,623 | 1,420 |
| Other Race | 1,335 | 923 | 367 |
| Native American | 506 | 436 | 207 |
| Islander | 45 | 35 |
The highest rate of high school graduation is among 2+ races people with a rate of 97.84%.
The highest rate of bachelors degrees is among asian people with a rate of 61.70%.
St. Charles County, Missouri Educational Attainment by Race
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$49,971
Average Earnings
$60,787
Average Male
$40,149
Average Female
St. Charles County, Missouri Earnings by Educational Attainment
St. Charles County, Missouri Language by Age
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St. Charles County, Missouri Language
94.20% of St. Charles County, Missouri residents speak only English, while 5.80% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 2.37% of the population.
St. Charles County, Missouri Language
St. Charles County, Missouri Poverty by Race
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| Name | Total | In Poverty | Poverty Rate |
|---|---|---|---|
| White | 336,774 | 14,638 | 4.35% |
| Black | 16,835 | 2,116 | 12.57% |
| Multiple | 10,094 | 1,445 | 14.32% |
| Hispanic | 12,394 | 1,258 | 10.15% |
| Asian | 9,937 | 387 | 3.89% |
| Other | 2,285 | 293 | 12.82% |
| Islander | 121 | 65 | 53.72% |
| Native | 640 | 54 | 8.44% |
5.18%
Overall Poverty Rate
4.22%
Male Poverty Rate
6.11%
Female Poverty Rate
Poverty in St. Charles County, Missouri
The race most likely to be in poverty in St. Charles County, Missouri is Islander, with 53.72% below the poverty level.
The race least likely to be in poverty in St. Charles County, Missouri is Asian, with 3.89% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 0.97%. Among those working part-time, it was 7.49%, and for those that did not work, the poverty rate was 9.50%.
St. Charles County, Missouri Poverty
St. Charles County, Missouri Poverty Rate by Education
St. Charles County, Missouri Marital Status
Marriage Rates
56.0%
Overall Marriage Rate
57.7%
Male Marriage Rate
54.5%
Female Marriage Rate
St. Charles County, Missouri Married by Age and Sex
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St. Charles County, Missouri Marriage
The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 35-44.
St. Charles County, Missouri Marital Status by Race
St. Charles County, Missouri Marital Status
St. Charles County, Missouri Veterans by War
St. Charles County, Missouri Veterans by Age
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| Name | Veterans | % of Total |
|---|---|---|
| White | 22,354 | 8.19% |
| Black | 1,103 | 8.45% |
| Hispanic | 541 | 6.50% |
| 2+ Races | 360 | 7.08% |
| Other Race | 138 | 8.36% |
| Asian | 134 | 1.74% |
| Native American | 105 | 17.98% |
St. Charles County, Missouri Veterans by Race
St. Charles County, Missouri Veterans by Education
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1.90%
Veteran Poverty Rate
23.84%
Veteran Disability Rate
St. Charles County, Missouri Veterans by Education
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69.9%
Labor Force Participation
67.8%
Employment Rate
2.9%
Unemployment Rate
St. Charles County, Missouri Employment by Age
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St. Charles County, Missouri Employment by Race
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St. Charles County, Missouri Employment by Education
Origin of Non-Citizens
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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Origin of Naturalized Citizens
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68.51%
Born in St. Charles County, Missouri
95.95%
Native Born
4.05%
Foreign Born
2.08%
Non Citizen
1.96%
Naturalized
Place of Birth
95.95% of St. Charles County, Missouri residents were born in the United States, with 68.51% having been born in Missouri. 2.08% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.
St. Charles County, Missouri Place of Birth
- US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
- Population of States and Counties of the United States: 1790 - 1990