St. Charles County, Missouri Population 2023

418,696

St. Charles County, Missouri's estimated 2023 population is 418,696 with a growth rate of 1.08% 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 360,485 and has seen a growth of 16.15% since that time.

Note: data after 2020 is projected based on recent growth

St. Charles County, Missouri Population 2023

Population by Race

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 2023

St. Charles County, Missouri Median Age

39

Total

37.8

Male

40.2

Female

St. Charles County, Missouri Adults

There are 305,584 adults, (60,571 of whom are seniors) in St. Charles County, Missouri.

St. Charles County, Missouri Age Dependency

62.6

Age Dependency Ratio

24.7

Old Age Dependency Ratio

37.9

Child Dependency Ratio

St. Charles County, Missouri Sex Ratio

Female202,56550.84%
Male195,90749.16%

St. Charles County, Missouri Population by Age

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

3.1

Average Family Size

2.62

Average Household Size

81.6%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

St. Charles County, Missouri Households and Families

Male

Female

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

The highest rate of high school graduation is among white people with a rate of 81.53%.

The highest rate of bachelors degrees is among asian people with a rate of 53.96%.

St. Charles County, Missouri Educational Attainment by Race

All

Male

Female

$51,448

Average Earnings

$61,971

Average Male

$41,349

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

94.5% of St. Charles County, Missouri residents speak only English, while 5.5% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 2.29% of the population.

St. Charles County, Missouri Language

St. Charles County, Missouri Poverty by Race

rate

5.8%

Overall Poverty Rate

4.03%

Male Poverty Rate

5.54%

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 112.73% below the poverty level.

The race least likely to be in poverty in St. Charles County, Missouri is White, with 4.75% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 0.92%. Among those working part-time, it was 7.05%, and for those that did not work, the poverty rate was 8.84%.

St. Charles County, Missouri Poverty

St. Charles County, Missouri Poverty Rate by Education

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

St. Charles County, Missouri Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

mean

median

Income by Household Type

St. Charles County, Missouri Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

56.5%

Overall Marriage Rate

58.1%

Male Marriage Rate

54.9%

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 Over 65, 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

23,046

Number of Veterans

21,618

Male Veterans

1,428

Female Veterans

St. Charles County, Missouri Veterans by War

St. Charles County, Missouri Veterans by Age

count

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

2.76%

Veteran Poverty Rate

25%

Veteran Disability Rate

St. Charles County, Missouri Veterans by Education

LaborForceParticipation

69.6%

Labor Force Participation

67.5%

Employment Rate

3%

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

67.72%

Born in St. Charles County, Missouri

94.45%

Native Born

3.88%

Foreign Born

1.81%

Non Citizen

2.06%

Naturalized

Place of Birth

94.45% of St. Charles County, Missouri residents were born in the United States, with 67.72% having been born in Missouri. 1.81% 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