United States › Missouri › St. Clair County COUNTY
St. Clair County Missouri · 9,976 residents (2025 est.) · 675 sq mi
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The short version
With 9,587 people, St. Clair County is a county in Missouri. Four-year degrees are less common here than nationally, at 15% of adults. The median age is 46.1, about 7 years above the US median. The foreign-born share is 1%. There are 14 people per square mile. The typical home is worth $157,100, having more than doubled since 2000.
At a glance
Lower income
below the US median
US median: $82,259
Older
median age 46.1
US median: 38.9
Less educated
15% hold a bachelor's degree
US average: 36%
Less affordable
home values up 48%, inflation adjusted
US median home: $376,019
Section 01
Population & growth from 9,652 in 2000
9,976 in 2025 (Census Bureau estimate)
from 14 / sq mi in 2009
US average: 281
from 43.9 in 2000
US average: 38.9
Population, 1990 – 2024
8K 9K 9K 10K 10K 1990 2000 2010 2020 2024 St. Clair County Age distribution, 2024
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy $53,043
+15%inflation adjusted, since 2000
from $25,321 in 2000
US average: $82,259
from $14,025 in 2000
US average: $44,673
Households earning $100K+
from 12.7% in 2009
US average: 53.3%
from 19.6% in 2000
US average: 12.5%
from 0.410 in 2010
US average: 0.476
Workforce by industry, 2024
Professional, scientific, technical 8.8%
Agriculture, forestry, fishing 7.5%
Education & health services 2.6%
Public administration 2.5%
Transportation & warehousing 1.8%
Arts, entertainment, food 1.2%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
$157,100
+48%inflation adjusted, since 2000
from $58,100 in 2000
US average: $376,019
$622
+18%inflation adjusted, since 2000
from $290 in 2000
US average: $1,442
from 79.4% in 2000
24.0% rent
from 24.0% in 2009
US average: 10.0%
from 2.24 people in 2009
US average: 2.54
from 22.5% in 2009
US average: 22.9%
from 27.8% in 2009
US average: 47.4%
from 2.4 in 2009
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
Section 04
Race & ethnicity 2000
White, non-Hispanic 96.7%(9,338)
2024
White, non-Hispanic 92.8%(8,898)
Hispanic / Latino 2.2%(213)
from 10 in 2009
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
from 13 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 Ancestry
+ 20 more ancestry groups with data from 9.0% in 2000
US average: 35.6%
High school or higher
from 73.1% in 2000
US average: 89.6%
from 3.7% in 2000
US average: 14.0%
Section 06
Commute & transportation from 23.4 min in 2000
US average: 26.5
from 71.2% in 2009
US average: 68.9%
from 12.2% in 2009
US average: 8.5%
from 1.2% in 2009
US average: 3.2%
from 8.7% in 2009
US average: 15.0%
from 5.5% in 2009
US average: 2.4%
from 0.0% in 2009
US average: 0.4%
from 5.4% in 2009
US average: 8.3%
Section 07
Work & employment from 7.4% in 2011
US average: 5.2%
from 54.1% in 2011
US average: 63.5%
Women 20-64 in the labor force
from 64.9% in 2020
US average: 74.6%
from 17.1% in 2009
US average: 13.1%
from 30.9% in 2009
US average: 42.5%
Section 08
People & community from 0.4% in 2009
US average: 14.1%
from 16.2% in 2009
US average: 6.2%
from 24.0% in 2012
US average: 13.3%
from 18.5% in 2013
US average: 8.4%
from 60.0% in 2017
US average: 91.0%
Computer in household
from 83.1% in 2020
US average: 95.5%
from 86.7% in 2020
US average: 87.7%
from 94.9% in 2016
US average: 77.7%
from 1.3% in 2016
US average: 13.6%
Marital status
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09
Health coverage from 18.5% in 2013
US average: 8.4%
from 36.4% in 2020
US average: 54.8%
Direct-purchase
from 20.0% in 2020
US average: 13.8%
from 31.6% in 2020
US average: 18.4%
from 20.0% in 2020
US average: 20.9%
VA health care
from 4.5% in 2020
US average: 2.2%
Any private
from 56.7% in 2020
US average: 67.1%
Any public
from 47.1% 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) 16.3%(107)
Gulf War (1990s) 30.2%(199)
Share of the 658 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. Clair County Head to head
Compare St. Clair County to nearby counties ST. CLAIR COUNTY VS
Cedar County
Income $48,181 −9%
Home value $168,100 +7%
Population 14,888 +49%
SEE FULL COMPARISON →
ST. CLAIR COUNTY VS
Henry County
Income $57,926 +9%
Home value $160,600 +2%
Population 22,671 +127%
SEE FULL COMPARISON →
ST. CLAIR COUNTY VS
Hickory County
Income $39,390 −26%
Home value $176,100 +12%
Population 9,044 −9%
SEE FULL COMPARISON →
ST. CLAIR COUNTY VS
Benton County
Income $52,567 −1%
Home value $177,900 +13%
Population 20,536 +106%
SEE FULL COMPARISON →
Frequently asked
How many people live in St. Clair County, Missouri? St. Clair County, Missouri has about 9,587 residents according to the 2024 American Community Survey.
What is the median household income in St. Clair County, Missouri? The typical household in St. Clair County, Missouri earns about $53,043 a year. Half of households make more than that, and half make less.
Is St. Clair County, Missouri expensive? In St. Clair County, Missouri, the median home is worth about $157,100, and the typical rent is about $622 a month.
How educated are people in St. Clair County, Missouri? About 14.7% of adults age 25 and over in St. Clair County, Missouri hold a bachelor's degree or higher.
What is the poverty rate in St. Clair County, Missouri? About 14.7% of people in St. Clair County, Missouri live below the federal poverty line.
Has St. Clair County, Missouri grown since 1990? Yes, St. Clair County, Missouri has grown since 1990. The population has added about 1,130 residents, a change of about 13 percent over that period.
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