St. Charles County, Missouri Population 2024

419,520

St. Charles County, Missouri's estimated 2024 population is 419,520 with a growth rate of 0.69% in the past year according to the most recent United States census data. St. Charles County, Missouri is the 3rd largest county in Missouri. The 2010 population was 361,808 and has seen a growth of 15.95% since that time.

Note: data after 2022 is projected based on recent change
Year
Population
Growth
Change
2029433,8252,8610.66%
2028430,9642,8610.67%
2027428,1032,8610.67%
2026425,2422,8610.68%
2025422,3812,8610.68%
2024419,5202,8610.69%
2023416,6592,8610.69%
2022413,7983,3330.81%
2021410,4654,0481%
2020406,4174,7921.19%
2019401,6252,9690.74%
2018398,6563,5030.89%
2017395,1534,4291.13%
2016390,7245,6161.46%
2015385,1085,1521.36%
2014379,9565,5781.49%
2013374,3785,2031.41%
2012369,1753,5610.97%
2011365,6143,8061.05%
2010361,80800%
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%
191024,6952210.9%
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%
18103,505-430,320-99.19%
2024 Growth Rate
0.69% (2,861)
County Website
St. Charles County
County Seat
Saint Charles
2020 Population
406,417
Area
561 mi²
Density
748 people/mi²
Growth Since 2020
3.22% (13,103)
Founded
October 1, 1812

Population by Race

Race
Population
Percentage (of total)
White351,47786.51%
Black or African American20,4675.04%
Two or more races18,5804.57%
Asian11,1522.75%
Other race4,0561%
Native American3460.09%
Native Hawaiian or Pacific Islander1840.05%

White

Black or African American

Two or more races

Asian

Other race

Native American

Native Hawaiian or Pacific Islander

St. Charles County, Missouri Population by Race

St. Charles County, Missouri Population Pyramid 2024

St. Charles County, Missouri Median Age

39.4

Total

38.3

Male

40.5

Female

St. Charles County, Missouri Adults

There are 313,584 adults, (65,171 of whom are seniors) in St. Charles County, Missouri.

St. Charles County, Missouri Age Dependency

63.5

Age Dependency Ratio

26.2

Old Age Dependency Ratio

37.3

Child Dependency Ratio

St. Charles County, Missouri Sex Ratio

Female205,13150.49%
Male201,13149.51%

St. Charles County, Missouri Population by Age

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

Household Type
Count
Average Size
Owner
Renter
All156,3812.5680.719.3
Married90,8143.1192.47.6
Non Family46,3501.2362.937.1
Female13,0293.2267.832.2
Male6,1882.9571.228.8

3.05

Average Family Size

2.56

Average Household Size

80.7%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

St. Charles County, Missouri Households and Families

Male

Female

Education Attained
Count
Percentage
9th to 12th Grade9,1293.27%
Associates Degree25,1228.99%
Bachelors Degree74,03726.5%
Graduate Degree43,22015.47%
High School Graduate63,75722.82%
Less Than 9th Grade3,6201.3%
Some College60,52321.66%

Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

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

St. Charles County, Missouri Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

Race
Total
High School
Bachelors
White244,433234,391101,486
Black13,51112,6845,485
2+ Races7,8957,4982,967
Hispanic7,7046,8502,903
Asian7,6837,0115,101
Other Race2,3761,820772
Native American236229108
Islander71710

The highest rate of high school graduation is among islander people with a rate of 100%.

The highest rate of bachelors degrees is among asian people with a rate of 66.39%.

St. Charles County, Missouri Educational Attainment by Race

All

Male

Female

Name
Average
Male
Female
Bachelors Degree$72,483$89,683$58,229
Graduate Degree$86,855$111,912$71,528
High School Graduate$43,048$52,407$35,072
Less Than 9th Grade$34,886$39,223$24,201
Overall$59,230$70,253$49,336
Some College$50,546$61,149$41,051

$59,230

Average Earnings

$70,253

Average Male

$49,336

Average Female

St. Charles County, Missouri Earnings by Educational Attainment

St. Charles County, Missouri Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

St. Charles County, Missouri Language

94.9% of St. Charles County, Missouri residents speak only English, while 5.1% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 2.05% of the population.

St. Charles County, Missouri Language

St. Charles County, Missouri Poverty by Race

rate

Name
Total
In Poverty
Poverty Rate
White339,88913,3693.93%
Multiple18,3631,6438.95%
Black19,8121,5687.91%
Hispanic13,8551,2819.25%
Asian10,8645475.03%
Other3,9673899.81%
Islander1805731.67%
Native345164.64%

4.52%

Overall Poverty Rate

3.85%

Male Poverty Rate

5.18%

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 31.67% below the poverty level.

The race least likely to be in poverty in St. Charles County, Missouri is White, with 3.93% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 0.79%. Among those working part-time, it was 6.51%, and for those that did not work, the poverty rate was 8.87%.

St. Charles County, Missouri Poverty

rate

Rate
Poverty
Less Than 9th Grade10.77%
High School6.08%
Some College4.38%
Bachelors or Greater1.9%

St. Charles County, Missouri Poverty Rate by Education

rate

Rate
Poverty
Female Unemployed11%
Male Unemployed9.22%
Female Employed2.33%
Male Employed1.96%

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

St. Charles County, Missouri Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

Name
Median
Mean
Families$118,114$140,558
Households$99,596$122,330
Married Families$129,891$152,001
Non Families$53,799$73,923

mean

median

Income by Household Type

St. Charles County, Missouri Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

56.8%

Overall Marriage Rate

58.6%

Male Marriage Rate

55.2%

Female Marriage Rate

St. Charles County, Missouri Married by Age and Sex

male

female

St. Charles County, Missouri Marriage

The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 45-54.

St. Charles County, Missouri Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

St. Charles County, Missouri Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

22,205

Number of Veterans

20,815

Male Veterans

1,390

Female Veterans

War
Veterans
Vietnam8,297
Second Gulf War4,600
First Gulf War4,415
Korea1,221
World War II396

St. Charles County, Missouri Veterans by War

count

Age Group
Veterans
65 to 746,030
75+5,850
35 to 545,435
55 to 643,443
18 to 341,447

St. Charles County, Missouri Veterans by Age

count

Name
Veterans
% of Total
White20,1627.31%
Black1,0937.08%
2+ Races5775.59%
Hispanic3844.06%
Asian2172.52%
Other Race1134.01%
Native American4315.99%

St. Charles County, Missouri Veterans by Race

St. Charles County, Missouri Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

3.34%

Veteran Poverty Rate

25.86%

Veteran Disability Rate

St. Charles County, Missouri Veterans by Education

LaborForceParticipation

69.4%

Labor Force Participation

67.1%

Employment Rate

3.1%

Unemployment Rate

St. Charles County, Missouri Employment by Age

LaborForceParticipation

St. Charles County, Missouri Employment by Race

LaborForceParticipation

St. Charles County, Missouri Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

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

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

68.67%

Born in St. Charles County, Missouri

96.01%

Native Born

3.99%

Foreign Born

1.7%

Non Citizen

2.29%

Naturalized

Place of Birth

96.01% of St. Charles County, Missouri residents were born in the United States, with 68.67% having been born in Missouri. 1.7% 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

Sources