St. Charles County, Missouri Population 2020

St. Charles County, Missouri's estimated population is 407,056 with a growth rate of 0.98% in the past year according to the most recent United States census data. St. Charles County, Missouri is the 3rd largest county in Missouri.

Year Population Growth Growth Rate
2020407,0563,9370.98%
2019403,1193,9370.99%
2018399,1823,9371.00%
2017395,2454,6461.19%
2016390,5995,5601.44%
2015385,0395,1811.36%
2014379,8585,5701.49%
2013374,2885,1901.41%
2012369,0983,5540.97%
2011365,5443,7461.04%
2010361,798148,89169.93%
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%

St. Charles County, Missouri Population Growth

Population by Race

Race Population Percentage
White350,75789.94%
Black or African American17,1724.40%
Asian9,6812.48%
Two or More Races9,6072.46%
Some Other Race2,0630.53%
American Indian and Alaska Native6570.17%
Native Hawaiian and Other Pacific Islander480.01%

St. Charles County, Missouri Population Pyramid 2020

St. Charles County, Missouri Median Age

38.2


Total

37.1


Male

39.5


Female

St. Charles County, Missouri Adults

There are 297,042 adults, (55,482 of whom are seniors) in St. Charles County, Missouri.

St. Charles County, Missouri Age Dependency

61.4

Age Dependency Ratio

23

Old Age Dependency Ratio

38.5

Child Dependency Ratio

St. Charles County, Missouri Sex Ratio

Female

198,344

50.86%

Male

191,641

49.14%

St. Charles County, Missouri Households and Families

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

St. Charles County, Missouri Household Types

Type Owner Renter
Married90.5%9.5%
All80.4%19.6%
Male74.8%25.2%
Female66.7%33.3%
Non Family64.5%35.5%

80.4%

Rate of Home Ownership

Type Count Average Size Owned
All144,6432.6480.4
Married84,6573.1990.5
Non Family40,3611.2364.5
Female13,6723.2166.7
Male5,9533.1774.8

3.13

Average Family Size

2.64

Average Household Size

5.1%

Unmarried (Opposite Sex)

0.2%

Unmarried (Same Sex)

St. Charles County, Missouri Education

Education Attained Count Percentage
Less Than 9th Grade3,6231.37%
9th to 12th Grade10,2513.89%
High School Graduate66,27125.15%
Some College59,28722.50%
Associates Degree24,4159.26%
Bachelors Degree63,53724.11%
Graduate Degree36,14813.72%

St. Charles County, Missouri Educational Attainment by Race

Name Total High School Bachelors
White236,035224,59887,860
Black10,87410,3234,119
Asian6,5386,0544,317
Hispanic6,4365,3922,104
Multiple Races3,5763,3971,258
Other Race1,129764307
Native American510345168
Islander32229

The highest rate of high school graduation is among white people with a rate of 95.15%.

The highest rate of bachelors degrees is among asian people with a rate of 66.03%.

Name Average Male Female
Overall$48,325$58,345$39,240
Less Than High School$24,663$32,446$18,002
High School Grad$35,393$43,242$27,187
Some College$42,244$53,177$34,167
Bachelors Degree$59,754$78,142$45,971
Graduate Degree$71,285$93,050$59,706

$48,325

Average Earnings

$58,345

Average Male

$39,240

Average Female

St. Charles County, Missouri Language

St. Charles County, Missouri Language by Age

St. Charles County, Missouri Language

94.13% of St. Charles County, Missouri residents speak only English, while 5.87% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 2.38% of the population.

St. Charles County, Missouri Poverty

St. Charles County, Missouri Poverty by Race

Name Total In Poverty Poverty Rate
White334,21816,2624.87%
Black16,5262,14012.95%
Hispanic12,0831,42911.83%
Multiple9,5271,22412.85%
Other1,94234717.87%
Asian9,4203243.44%
Native655294.43%

5.62%

Overall Poverty Rate

4.79%

Male Poverty Rate

6.43%

Female Poverty Rate

Poverty in St. Charles County, Missouri

The race most likely to be in poverty in St. Charles County, Missouri is Other, with 17.87% below the poverty level.

The race least likely to be in poverty in St. Charles County, Missouri is Asian, with 3.44% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.10%. Among those working part-time, it was 7.70%, and for those that did not work, the poverty rate was 10.18%.

Name Poverty
Less Than High School17.21%
High School6.13%
Some College4.60%
Bachelors or Greater1.56%
Name Poverty
Female Unemployed22.56%
Male Unemployed9.96%
Female Employed3.52%
Male Employed2.04%

St. Charles County, Missouri Income

St. Charles County, Missouri Income by Household Type

Name Median Mean
Households$81,411$98,457
Families$96,349$113,397
Married Families$106,348$123,748
Non Families$42,632$55,847

St. Charles County, Missouri Marital Status

St. Charles County, Missouri Marital Status

Marriage Rates

55.9%

Overall Marriage Rate

57.6%

Male Marriage Rate

54.3%

Female Marriage Rate

St. Charles County, Missouri Married by Age and Sex

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 35-44.

St. Charles County, Missouri Marital Status by Race

St. Charles County, Missouri Veterans

24,637

Number of Veterans

23,115

Male Veterans

1,522

Female Veterans

War Veterans
Vietnam9,124
First Gulf War4,847
Second Gulf War3,789
Korea2,234
World War II840
Age Group Veterans
65 to 746,809
35 to 545,841
75+5,523
55 to 644,447
18 to 342,017
Name Veterans % of Total
White22,7898.43%
Black1,2189.72%
Hispanic4986.24%
2 or More3396.71%
Other1249.26%
Asian1091.52%
Indian5810.16%

$St. Charles County, Missouri Veterans by Education

2.32%

Veteran Poverty Rate

24.91%

Veteran Disability Rate

St. Charles County, Missouri Employment Status

70.2%

Labor Force Participation

67.8%

Employment Rate

3.3%

Unemployment Rate

St. Charles County, Missouri Place of Birth

Origin of Non-Citizens

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

Origin of Naturalized Citizens

68.84%

Born in Missouri

95.98%

Native Born

4.02%

Foreign Born

2.09%

Non Citizen

Place of Birth

95.98% of St. Charles County, Missouri residents were born in the United States, with 68.84% having been born in Missouri. 2.09% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

  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