Checked
St. Clair County, MO
7 cities and towns and 5 ZIP codes in St. Clair County, Missouri.
Population
9,587
Land area
675sq mi
People per sq mi
14
ZIP codes
5
Cities and towns in St. Clair County
St. Clair County at a glance
- St. Clair County is 84% less dense than Missouri as a whole.
- Households here earn a median of $53,043 a year, 25% less than the Missouri figure of $70,702.
- A typical owner-occupied home is valued at $157,100 (32% below Missouri) and median rent is $622 a month.
- The biggest population centers are Appleton City (1,221), Osceola (1,042) and Lowry City (618).
Local data for St. Clair County, MO
Counts from official public data
Housing and community stats
St. Clair County, MO, American Community Survey 2020-2024
Median household income
$53,043
Poverty rate
14.7%
Median home value
$157,100
Prices +28.4% in a year
Median rent
$622/mo
Homeownership
76.0%
Bachelor's or higher
14.7%
Median age
46.1
Average commute
28.4 min
Largest reported origins and ancestries: German Americans (2,011), Irish Americans (1,034), Italian Americans (152).
Economy and federal money
Jobs, income, federal spending and pandemic loans
Unemployment rate
4.2%
Aug 2026, -0.9 pts in a year
Average annual pay
$41,221
1,746 jobs, 2025
Income per person
$40,999
BEA, 2024
Federal spending
$87.2M
FY 2026, $9,397 per person
PPP loans
$10.1M
585 loans, 1,475 jobs reported
Campaign donations
$12.7K
Itemized, 2026 cycle
How people get to work
St. Clair County, MO, workers 16 and older. American Community Survey 5-year estimates
- Drove alone75.5%
- Carpooled13.7%
- Public transit0.2%
- Walked1.4%
- Bicycle0.0%
- Taxi, ride-hailing, motorcycle or other0.4%
- Worked from home8.8%
Average one-way commute: 28.4 minutes for people who do not work from home.
Environment and hazard risk
St. Clair County, MO, from FEMA, NOAA and EPA
Natural hazard risk
Very Low
Top: drought
Storm events since 1996
478
Most often hail
July high / Jan low
90° / 21°F
43.2 inches of rain a year
Hazards, floods and storm historyCheck a flood zone2 historic places
Health statistics
Share of adults in St. Clair County, MO, CDC PLACES estimates
Obesity
37.6%
U.S. 33.3% +4.3 pts
Diabetes
16.2%
U.S. 12.1% +4.1 pts
Smoking
20.9%
U.S. 12.8% +8.1 pts
Uninsured (18-64)
10.2%
U.S. 11.1% -0.9 pts
Cities, towns and ZIP codes in St. Clair County
Population shown
Frequently asked questions
- What is the largest city in St. Clair County, MO?
- Appleton City is the largest city or town in St. Clair County, with about 1,221 residents.
- How many ZIP codes are in St. Clair County?
- St. Clair County includes 5 ZIP Code Tabulation Areas, including 64724, 64738, 64763, 64776, 64781.
- What is the population of St. Clair County, MO?
- About 9,587 people live in St. Clair County, based on American Community Survey 5-year estimates.
- What counties border St. Clair County?
- St. Clair County borders Polk County, Henry County, Benton County, Vernon County, Bates County, Cedar County, Hickory County.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023