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Marshall County, IL
8 cities and towns and 10 ZIP codes in Marshall County, Illinois.
Population
11,647
Land area
387sq mi
People per sq mi
30
ZIP codes
10
Cities and towns in Marshall County
Marshall County at a glance
- Marshall County is 87% less dense than Illinois as a whole.
- The median household income is $71,585, 14% below the Illinois median of $83,390.
- A typical owner-occupied home is valued at $142,800 (46% below Illinois) and median rent is $782 a month.
- Its largest cities are Henry (2,441), Lacon (1,916) and Toluca (1,477).
Local data for Marshall County, IL
Counts from official public data
Housing and community stats
Marshall County, IL, American Community Survey 2020-2024
Median household income
$71,585
Poverty rate
11.4%
Median home value
$142,800
Prices +12.3% in a year
Median rent
$782/mo
Homeownership
79.2%
Bachelor's or higher
18.0%
Median age
46.1
Average commute
28.9 min
Largest reported origins and ancestries: German Americans (3,568), Irish Americans (1,794), Italian Americans (773).
Economy and federal money
Jobs, income, federal spending and pandemic loans
Unemployment rate
3.9%
Sep 2026, -0.7 pts in a year
Average annual pay
$50,050
2,864 jobs, 2025
Income per person
$58,087
BEA, 2024
Federal spending
$97.6M
FY 2026, $8,308 per person
PPP loans
$18.8M
568 loans, 2,784 jobs reported
Campaign donations
$24.1K
Itemized, 2026 cycle
How people get to work
Marshall County, IL, workers 16 and older. American Community Survey 5-year estimates
- Drove alone86.9%
- Carpooled4.4%
- Public transit0.1%
- Walked1.3%
- Bicycle0.3%
- Taxi, ride-hailing, motorcycle or other0.4%
- Worked from home6.6%
Average one-way commute: 28.9 minutes for people who do not work from home.
Environment and hazard risk
Marshall County, IL, from FEMA, NOAA and EPA
Natural hazard risk
Very Low
Top: drought
Storm events since 1996
367
Most often thunderstorm wind
Flood insurance policies
22
0.4% of homes, county
July high / Jan low
87° / 18°F
38.4 inches of rain a year
Hazards, floods and storm historyCheck a flood zone1 historic places
Health statistics
Share of adults in Marshall County, IL, CDC PLACES estimates
Obesity
38.6%
U.S. 33.3% +5.3 pts
Diabetes
13.0%
U.S. 12.1% +0.9 pts
Smoking
15.2%
U.S. 12.8% +2.4 pts
Uninsured (18-64)
8.1%
U.S. 11.1% -3.0 pts
Cities, towns and ZIP codes in Marshall County
Population shown
Frequently asked questions
- What is the largest city in Marshall County, IL?
- Henry is the largest city or town in Marshall County, with about 2,441 residents.
- How many ZIP codes are in Marshall County?
- Marshall County includes 10 ZIP Code Tabulation Areas, including 61369, 61375, 61377, 61424, 61479.
- What is the population of Marshall County, IL?
- About 11,647 people live in Marshall County, based on American Community Survey 5-year estimates.
- What counties border Marshall County?
- Marshall County borders Peoria County, LaSalle County, Woodford County, Bureau County, Putnam County, Stark County.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023