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
2021408,5063,2420.80%
2020405,2643,2420.81%
2019402,0223,2420.81%
2018398,7803,6500.92%
2017395,1304,5891.18%
2016390,5415,5631.45%
2015384,9785,1341.35%
2014379,8445,5561.48%
2013374,2885,1771.40%
2012369,1113,5290.97%
2011365,5823,7791.04%
2010361,803148,89669.93%
1990212,90768,80047.74%
1980144,10751,15355.03%
197092,95439,98475.48%
196052,97023,13677.55%
195029,8344,27216.71%
194025,5621,2084.96%
193024,3541,5266.68%
192022,828-1,867-7.56%
191024,6952210.90%
190024,4741,4976.52%
189022,977-88-0.38%
188023,0651,7618.27%
187021,3044,78128.94%
186016,5235,06944.26%
185011,4543,54344.79%
18407,9113,59183.13%
18304,3203508.82%
18203,97046513.27%
18103,5050.00%
2021 Growth Rate
0.80% (3,242)
County Website
Founded
October 1, 1812
County Seat
2010 Population
361,803
Growth Since 2010
12.91% (46,703)
map placeholder

St. Charles County, Missouri Population Growth

Population by Race

Race Population Percentage
White353,29789.60%
Black or African American17,4684.43%
Asian10,1832.58%
Two or More Races10,1472.57%
Some Other Race2,4160.61%
American Indian and Alaska Native6410.16%
Native Hawaiian and Other Pacific Islander1380.03%
Loading...

St. Charles County, Missouri Population by Race

St. Charles County, Missouri Population Pyramid $2021

Loading...

St. Charles County, Missouri Median Age

38.6


Total

37.4


Male

39.8


Female

St. Charles County, Missouri Adults

There are 301,339 adults, (58,034 of whom are seniors) in St. Charles County, Missouri.

St. Charles County, Missouri Age Dependency

62.1

Age Dependency Ratio

23.9

Old Age Dependency Ratio

38.2

Child Dependency Ratio

St. Charles County, Missouri Sex Ratio

Female

200,571

50.87%

Male

193,719

49.13%

St. Charles County, Missouri Population by Age

St. Charles County, Missouri Renter vs Owner Occupied by Household Type

map placeholder

St. Charles County, Missouri Household Types

Type Owner Renter
Non Family64.3%35.7%
Female66.6%33.4%
Male75.6%24.4%
All80.6%19.4%
Married91%9%

80.6%

Rate of Home Ownership

St. Charles County, Missouri Households and Families

Type Count Average Size Owned
All146,6312.6480.6
Married86,1463.1891
Non Family41,4991.2464.3
Female13,4253.2266.6
Male5,5613.1975.6

3.13

Average Family Size

2.64

Average Household Size

Loading...

St. Charles County, Missouri Households by Type

Loading...
Education Attained Count Percentage
Less Than 9th Grade3,6181.35%
9th to 12th Grade10,3353.86%
High School Graduate65,88324.60%
Some College59,21622.11%
Associates Degree24,6729.21%
Bachelors Degree66,22224.73%
Graduate Degree37,85214.13%
Loading...

St. Charles County, Missouri Educational Attainment by Sex (over 25)

St. Charles County, Missouri Educational Attainment by Race

Loading...
Race Total High School Bachelors
White239,067227,60791,510
Black11,35010,7474,561
Asian6,9296,2224,275
Hispanic6,7395,7242,302
2+ Races3,7033,6231,420
Other Race1,335923367
Native American506436207
Islander4535

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

Loading...
Name Average Male Female
Overall$49,971$60,787$40,149
Less Than 9th Grade$25,916$32,180$19,679
High School Graduate$36,584$44,967$28,428
Some College$43,926$53,764$34,440
Bachelors Degree$62,117$80,205$48,112
Graduate Degree$73,146$95,487$62,191

$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

Loading...

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

Loading...
Name Total In Poverty Poverty Rate
White336,77414,6384.35%
Black16,8352,11612.57%
Multiple10,0941,44514.32%
Hispanic12,3941,25810.15%
Asian9,9373873.89%
Other2,28529312.82%
Islander1216553.72%
Native640548.44%

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

Loading...
Name Poverty
Less Than 9th Grade14.77%
High School5.82%
Some College4.58%
Bachelors or Greater1.60%

St. Charles County, Missouri Poverty Rate by Education

Loading...
Rate Poverty
Female Unemployed20.34%
Male Unemployed9.50%
Female Employed3.36%
Male Employed1.92%

St. Charles County, Missouri Poverty Rate by Employment Status and Sex

St. Charles County, Missouri Income by Household Type

Loading...
Name Median Mean
Households$84,978$102,661
Families$100,320$118,003
Married Families$110,673$128,694
Non Families$45,755$59,544
Loading...

Income by Household Type

St. Charles County, Missouri Marital Status

map placeholder

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

Loading...

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

map placeholder

St. Charles County, Missouri Marital Status

Loading...

24,194

Number of Veterans

22,643

Male Veterans

1,551

Female Veterans

War Veterans
Vietnam8,927
First Gulf War4,729
Second Gulf War4,014
Korea2,068
World War II772

St. Charles County, Missouri Veterans by War

Loading...
Age Group Veterans
65 to 746,699
75+5,700
35 to 545,562
55 to 644,277
18 to 341,956

St. Charles County, Missouri Veterans by Age

Loading...
Name Veterans % of Total
White22,3548.19%
Black1,1038.45%
Hispanic5416.50%
2+ Races3607.08%
Other Race1388.36%
Asian1341.74%
Native American10517.98%

St. Charles County, Missouri Veterans by Race

St. Charles County, Missouri Veterans by Education

Loading...

1.90%

Veteran Poverty Rate

23.84%

Veteran Disability Rate

St. Charles County, Missouri Veterans by Education

Loading...

69.9%

Labor Force Participation

67.8%

Employment Rate

2.9%

Unemployment Rate

St. Charles County, Missouri Employment by Age

Loading...

St. Charles County, Missouri Employment by Race

Loading...

St. Charles County, Missouri Employment by Education

Origin of Non-Citizens

Loading...

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Loading...

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

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990

Sources