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COUNTY

St. Charles County

Missouri · 426,499 residents (2025 est.) · 561 sq mi
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Part of the St. Louis metro area
The short version

St. Charles County is a county of 414,535 people in Missouri. Households here earn about 48% more than in Missouri as a whole. Few US counties rank higher on income. The population is up 46% since 2000. Owners hold 81% of the housing stock. 4% of people here were born outside the United States.

At a glance
Wealthier
above the US median
US median: $82,259
Mid-age
median age 39.8
US median: 38.9
More educated
43% hold a bachelor's degree
US average: 36%
Less affordable
home values up 44%, inflation adjusted
US median home: $376,019
Section 01

Population & growth

Total population
414,535
+46%since 2000
from 283,883 in 2000
426,499 in 2025 (Census Bureau estimate)
1990 – 2025
Population density
740 / sq mi
+21%since 2009
from 611 / sq mi in 2009
US average: 281
Median age
39.8
+16%since 2000
from 34.3 in 2000
US average: 38.9
Land area
561 sq mi
Population, 1990 – 2024
193K253K314K374K435K19902000201020202024St. Charles County
2024415K
1990201020202024
Age distribution, 2024
Under 55.4%(22,376)
US avg: 5.6%
5 to 96.4%(26,576)
US avg: 6%
10 to 146.5%(27,007)
US avg: 6.4%
15 to 196.5%(26,795)
US avg: 6.6%
20 to 245.9%(24,348)
US avg: 6.5%
25 to 3412.4%(51,357)
US avg: 13.7%
35 to 4414.2%(58,928)
US avg: 13.2%
45 to 5412.4%(51,522)
US avg: 12.2%
55 to 6413.3%(55,218)
US avg: 12.7%
65 to 7410.1%(41,929)
US avg: 10.2%
75 to 845.2%(21,413)
US avg: 5.1%
85 and over1.7%(7,066)
US avg: 1.9%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02

Income & economy

Median household income
$104,692
Unchangedinflation adjusted, since 2000
from $57,258 in 2000
US average: $82,259
1990 – 2024
Per capita income
$51,051
+116%since 2000
from $23,592 in 2000
US average: $44,673
Households earning $100K+
65.3%
+19.2 ptssince 2009
from 46.1% in 2009
US average: 53.3%
Poverty rate
5.2%
+1.2 ptssince 2000
from 4.0% in 2000
US average: 12.5%
Income inequality (Gini)
0.408
+10%since 2010
from 0.373 in 2010
US average: 0.476
Workforce by industry, 2024
Retail trade12.6%
US avg: 9.9%
Information11.1%
US avg: 10.8%
Other services10.6%
US avg: 6.7%
Public administration8.6%
US avg: 4.8%
Wholesale trade7.1%
US avg: 6.9%
Finance & insurance4.5%
US avg: 5.9%
Professional, scientific, technical3.8%
US avg: 5.1%
Transportation & warehousing2.6%
US avg: 2.2%
Arts, entertainment, food1.7%
US avg: 1.9%
Education & health services0.8%
US avg: 0.9%
Agriculture, forestry, fishing0.7%
US avg: 1.6%
Construction0.6%
US avg: 1.2%
Manufacturing0.1%
US avg: 0.4%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03

Housing

Median home value
$320,800
+44%inflation adjusted, since 2000
from $122,600 in 2000
US average: $376,019
1990 – 2024
Median gross rent
$1,370
+21%inflation adjusted, since 2000
from $624 in 2000
US average: $1,442
Owner-occupied
80.5%
−1.5 ptssince 2000
from 82.0% in 2000
19.5% rent
Vacancy rate
3.5%
−1.2 ptssince 2009
from 4.7% in 2009
US average: 10.0%
Persons per household
2.53 people
−5%since 2009
from 2.65 people in 2009
US average: 2.54
Owner cost-burdened
16.3%
−6.8 ptssince 2009
from 23.1% in 2009
US average: 22.9%
Renter cost-burdened
39.7%
+0.4 ptssince 2009
from 39.3% in 2009
US average: 47.4%
Afford Score
3.1
+11%since 2009
from 2.8 in 2009
2009 – 2024
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Gentrification Score
54
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
Section 04

Race & ethnicity

2000
White, non-Hispanic93.8%(266,158)
Black2.7%(7,573)
Hispanic / Latino1.5%(4,176)
Asian0.8%(2,397)
Other0%
2024
White, non-Hispanic83%(343,925)
Black5%(20,824)
Hispanic / Latino4.2%(17,405)
Asian3%(12,472)
Other4.8%(19,909)
Diversity Score
38
+71%since 2009
from 22 in 2009
2009 – 2024
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Segregation Score
18
−8%since 2020
from 20 in 2020
Our index, 0 to 100. Higher means White and non-White residents are more separated across neighborhoods.
Section 04 · Origins

Detailed origins & ancestry

Hispanic origin
Mexican2.4%(10,080)
South American0.4%(1,693)
Central American0.4%(1,608)
Puerto Rican0.4%(1,465)
Colombian0.2%(804)
Guatemalan0.1%(517)
Honduran0.1%(375)
Dominican0.1%(374)
Spaniard0.1%(372)
Peruvian0.1%(323)
Cuban0.1%(280)
Panamanian0.1%(239)
+ 9 more hispanic origin groups with data
Venezuelan0.1%(221)
Salvadoran0%(206)
Argentine0%(131)
Ecuadorian0%(107)
Nicaraguan0%(104)
Bolivian0%(54)
Uruguayan0%(33)
Chilean0%(20)
Asian origin
Asian Indian1.2%(5,083)
Vietnamese0.4%(1,752)
Chinese0.4%(1,697)
Filipino0.4%(1,510)
Korean0.2%(866)
Pakistani0.1%(397)
Japanese0.1%(240)
Thai0%(201)
Nepalese0%(130)
Taiwanese0%(107)
Hmong0%(15)
+ 3 more asian origin groups with data
Pacific Islander origin
Samoan0%(140)
Ancestry
German31.3%(129,863)
Irish16.1%(66,607)
English12.6%(52,316)
Italian5.8%(23,858)
American5.8%(23,850)
French3.3%(13,570)
Polish2.9%(12,039)
Scottish2%(8,273)
Dutch0.9%(3,760)
Swedish0.8%(3,430)
Scotch-Irish0.7%(2,973)
Norwegian0.7%(2,913)
+ 49 more ancestry groups with data
Arab0.5%(1,922)
Welsh0.4%(1,862)
Czech0.4%(1,659)
British0.4%(1,570)
Russian0.3%(1,300)
Swiss0.3%(1,297)
Danish0.3%(1,162)
Hungarian0.3%(1,097)
Greek0.2%(974)
Austrian0.2%(972)
Ukrainian0.2%(874)
Croatian0.2%(762)
Lithuanian0.2%(718)
Lebanese0.1%(611)
Palestinian0.1%(583)
Iranian0.1%(579)
Portuguese0.1%(540)
Nigerian0.1%(516)
Egyptian0.1%(454)
Finnish0.1%(433)
Canadian0.1%(360)
Slovak0.1%(331)
West Indian0.1%(322)
Brazilian0.1%(312)
Ethiopian0.1%(301)
Belgian0.1%(234)
Jamaican0%(197)
Serbian0%(182)
Romanian0%(171)
Turkish0%(131)
Bulgarian0%(118)
Slovene0%(115)
Latvian0%(112)
Australian0%(109)
Armenian0%(85)
Syrian0%(77)
Israeli0%(67)
Ghanaian0%(45)
Jordanian0%(29)
Haitian0%(28)
Kenyan0%(22)
Moroccan0%(21)
Somali0%(16)
Guyanese0%(11)
Section 05

Education

Bachelor's degree or higher
42.7%
+16.4 ptssince 2000
from 26.3% in 2000
US average: 35.6%
High school or higher
95.7%
+6.6 ptssince 2000
from 89.1% in 2000
US average: 89.6%
Graduate degree
15.8%
+8.0 ptssince 2000
from 7.8% in 2000
US average: 14.0%
Section 06

Commute & transportation

Average commute
24.5 min
+38%since 2000
from 17.7 min in 2000
US average: 26.5
Drive alone to work
73.8%
−12.9 ptssince 2009
from 86.7% in 2009
US average: 68.9%
Carpooled to work
5.9%
−1.3 ptssince 2009
from 7.3% in 2009
US average: 8.5%
Public transit
0.1%
−0.1 ptssince 2009
from 0.1% in 2009
US average: 3.2%
Worked from home
18.0%
+13.9 ptssince 2009
from 4.1% in 2009
US average: 15.0%
Walked to work
0.8%
Unchangedsince 2009
from 0.8% in 2009
US average: 2.4%
Biked to work
0.1%
Unchangedsince 2009
from 0.1% in 2009
US average: 0.4%
No vehicle available
3.8%
+0.8 ptssince 2009
from 2.9% in 2009
US average: 8.3%
Section 07

Work & employment

Unemployment rate
2.9%
−3.1 ptssince 2011
from 6.0% in 2011
US average: 5.2%
Labor force participation
69.4%
−3.8 ptssince 2011
from 73.1% in 2011
US average: 63.5%
Women 20-64 in the labor force
81.9%
+2.3 ptssince 2020
from 79.6% in 2020
US average: 74.6%
Self-employed
11.0%
+1.5 ptssince 2009
from 9.4% in 2009
US average: 13.1%
Management & professional
48.4%
+9.3 ptssince 2009
from 39.1% in 2009
US average: 42.5%
Section 08

People & community

Male
49.5%
+0.1 ptssince 2009
from 49.3% in 2009
Female
50.5%
−0.1 ptssince 2009
from 50.7% in 2009
Foreign born
4.5%
+1.3 ptssince 2009
from 3.2% in 2009
US average: 14.1%
Veterans
6.6%
−4.5 ptssince 2009
from 11.1% in 2009
US average: 6.2%
With a disability
11.7%
+2.0 ptssince 2012
from 9.7% in 2012
US average: 13.3%
Uninsured
4.2%
−3.0 ptssince 2013
from 7.2% in 2013
US average: 8.4%
Broadband at home
95.1%
+8.5 ptssince 2017
from 86.6% in 2017
US average: 91.0%
Computer in household
97.4%
+1.6 ptssince 2020
from 95.8% in 2020
US average: 95.5%
Same house as last year
89.6%
+0.2 ptssince 2020
from 89.4% in 2020
US average: 87.7%
English only at home
94.2%
+0.4 ptssince 2016
from 93.8% in 2016
US average: 77.7%
Spanish at home
2.1%
−0.4 ptssince 2016
from 2.5% in 2016
US average: 13.6%
Marital status
Men 15+
Never married30.5%(50,668)
Married59%(98,118)
Widowed2.1%(3,562)
Divorced8.3%(13,854)
Women 15+
Never married25.4%(43,713)
Married55%(94,825)
Widowed7.7%(13,298)
Divorced11.9%(20,538)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09

Health coverage

Uninsured
4.2%
−3.0 ptssince 2013
from 7.2% in 2013
US average: 8.4%
Employer-based
72.2%
−2.7 ptssince 2020
from 74.9% in 2020
US average: 54.8%
Direct-purchase
11.6%
−0.8 ptssince 2020
from 12.4% in 2020
US average: 13.8%
Medicare
17.7%
+1.4 ptssince 2020
from 16.3% in 2020
US average: 18.4%
Medicaid
7.3%
+1.8 ptssince 2020
from 5.5% in 2020
US average: 20.9%
VA health care
1.6%
Unchangedsince 2020
from 1.6% in 2020
US average: 2.2%
Any private
82.1%
−3.2 ptssince 2020
from 85.3% in 2020
US average: 67.1%
Any public
24.4%
+3.3 ptssince 2020
from 21.1% in 2020
US average: 36.7%

Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.

Section 09 · Service history

Veterans

Veterans by period of service, 2024
Gulf War (2001 or later)22.1%(4,684)
US avg: 26.4%
Gulf War (1990s)22.6%(4,804)
US avg: 24.3%
Vietnam era36.2%(7,684)
US avg: 33.1%
Korean War3.6%(757)
US avg: 4.5%
World War II0.8%(177)
US avg: 1%

Share of the 21,217 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.

BAR + DOT: THIS PLACE · TICK: US AVERAGE
Drill deeper

Places similar to St. Charles County

Hillsborough County
Pop 433,415
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Pop 457,710
Sonoma County
Pop 486,444
Mercer County
Pop 399,289
Places similar to St. Charles County
Head to head

Compare St. Charles County to nearby counties

ST. CHARLES COUNTY VS
St. Louis County
Income$82,936−21%
Home value$276,800−14%
Population990,911+132%
SEE FULL COMPARISON →
ST. CHARLES COUNTY VS
Lincoln County
Income$89,278−15%
Home value$244,300−24%
Population66,676−84%
SEE FULL COMPARISON →
ST. CHARLES COUNTY VS
St. Louis
Income$56,160−46%
Home value$197,500−38%
Population278,144−35%
SEE FULL COMPARISON →
ST. CHARLES COUNTY VS
Warren County
Income$81,209−22%
Home value$260,400−19%
Population39,016−91%
SEE FULL COMPARISON →
Frequently asked

How many people live in St. Charles County, Missouri?

St. Charles County, Missouri has about 414,535 residents according to the 2024 American Community Survey.

What is the median household income in St. Charles County, Missouri?

The typical household in St. Charles County, Missouri earns about $104,692 a year. Half of households make more than that, and half make less.

Is St. Charles County, Missouri expensive?

In St. Charles County, Missouri, the median home is worth about $320,800, and the typical rent is about $1,370 a month.

How educated are people in St. Charles County, Missouri?

About 42.7% of adults age 25 and over in St. Charles County, Missouri hold a bachelor's degree or higher.

What is the poverty rate in St. Charles County, Missouri?

About 5.2% of people in St. Charles County, Missouri live below the federal poverty line.

Has St. Charles County, Missouri grown since 1990?

Yes, St. Charles County, Missouri has grown since 1990. The population has added about 201,628 residents, a change of about 95 percent over that period.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →