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Clay County, IL
6 cities and towns and 7 ZIP codes in Clay County, Illinois.
Population
13,052
Land area
468sq mi
People per sq mi
28
ZIP codes
7
Cities and towns in Clay County
Clay County at a glance
- Clay County is 88% less dense than Illinois as a whole.
- Households here earn a median of $60,417 a year, 28% less than the Illinois figure of $83,390.
- A typical owner-occupied home is valued at $97,400 (63% below Illinois) and median rent is $735 a month.
- The biggest population centers are Flora (4,475), Louisville (1,163) and Clay City (723).
Local data for Clay County, IL
Counts from official public data
Housing and community stats
Clay County, IL, American Community Survey 2020-2024
Median household income
$60,417
Poverty rate
17.5%
Median home value
$97,400
Prices +2.0% in a year
Median rent
$735/mo
Homeownership
79.3%
Bachelor's or higher
13.1%
Median age
40.4
Average commute
25.0 min
Largest reported origins and ancestries: German Americans (2,708), Irish Americans (1,702), Polish Americans (307).
Economy and federal money
Jobs, income, federal spending and pandemic loans
Unemployment rate
3.6%
Sep 2026, -1.1 pts in a year
Average annual pay
$52,006
4,691 jobs, 2025
Income per person
$54,942
BEA, 2024
Federal spending
$96.6M
FY 2026, $7,270 per person
PPP loans
$29.2M
828 loans, 3,595 jobs reported
Campaign donations
$22.7K
Itemized, 2026 cycle
How people get to work
Clay County, IL, workers 16 and older. American Community Survey 5-year estimates
- Drove alone85.6%
- Carpooled9.1%
- Public transit0.3%
- Walked0.6%
- Bicycle0.0%
- Taxi, ride-hailing, motorcycle or other0.0%
- Worked from home4.4%
Average one-way commute: 25.0 minutes for people who do not work from home.
Environment and hazard risk
Clay County, IL, from FEMA, NOAA and EPA
Natural hazard risk
Very Low
Top: drought
Storm events since 1996
424
Most often thunderstorm wind
Flood insurance policies
8
0.1% of homes, county
July high / Jan low
89° / 21°F
48.0 inches of rain a year
Hazards, floods and storm historyCheck a flood zone6 historic places
Health statistics
Share of adults in Clay County, IL, CDC PLACES estimates
Obesity
41.5%
U.S. 33.3% +8.2 pts
Diabetes
13.9%
U.S. 12.1% +1.8 pts
Smoking
17.8%
U.S. 12.8% +5.0 pts
Uninsured (18-64)
9.0%
U.S. 11.1% -2.1 pts
Cities, towns and ZIP codes in Clay County
Population shown
Frequently asked questions
- What is the largest city in Clay County, IL?
- Flora is the largest city or town in Clay County, with about 4,475 residents.
- How many ZIP codes are in Clay County?
- Clay County includes 7 ZIP Code Tabulation Areas, including 62426, 62434, 62824, 62839, 62858.
- What is the population of Clay County, IL?
- About 13,052 people live in Clay County, based on American Community Survey 5-year estimates.
- What counties border Clay County?
- Clay County borders Marion County, Effingham County, Fayette County, Wayne County, Richland County, Jasper County.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023