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Henry County, IL
18 cities and towns and 17 ZIP codes in Henry County, Illinois.
Population
48,643
Land area
823sq mi
People per sq mi
59
ZIP codes
17
Cities and towns in Henry County
Henry County at a glance
- Henry County is 74% less dense than Illinois as a whole.
- The median household income is $71,911, 14% below the Illinois median of $83,390.
- A typical owner-occupied home is valued at $151,600 (42% below Illinois) and median rent is $842 a month.
- Its largest cities are Kewanee (11,913), Geneseo (6,673) and Colona (5,139).
Local data for Henry County, IL
Counts from official public data
Housing and community stats
Henry County, IL, American Community Survey 2020-2024
Median household income
$71,911
Poverty rate
8.9%
Median home value
$151,600
Prices +5.2% in a year
Median rent
$842/mo
Homeownership
79.9%
Bachelor's or higher
24.7%
Median age
43.6
Average commute
22.2 min
Largest reported origins and ancestries: German Americans (11,086), Irish Americans (5,936), Swedish Americans (3,994).
Economy and federal money
Jobs, income, federal spending and pandemic loans
Unemployment rate
4.1%
Sep 2026, -0.9 pts in a year
Average annual pay
$52,235
13,972 jobs, 2025
Income per person
$60,048
BEA, 2024
Federal spending
$336M
FY 2026, $6,826 per person
PPP loans
$92.5M
2,190 loans, 10,822 jobs reported
Campaign donations
$176K
Itemized, 2026 cycle
How people get to work
Henry County, IL, workers 16 and older. American Community Survey 5-year estimates
- Drove alone80.0%
- Carpooled7.5%
- Public transit0.1%
- Walked2.5%
- Bicycle0.1%
- Taxi, ride-hailing, motorcycle or other1.2%
- Worked from home8.7%
Average one-way commute: 22.2 minutes for people who do not work from home.
Environment and hazard risk
Henry County, IL, from FEMA, NOAA and EPA
Natural hazard risk
Relatively Low
Top: strong wind
Storm events since 1996
812
Most often thunderstorm wind
Flood insurance policies
110
0.4% of homes, county
July high / Jan low
86° / 15°F
39.1 inches of rain a year
Hazards, floods and storm historyCheck a flood zone15 historic places
Health statistics
Share of adults in Henry County, IL, CDC PLACES estimates
Obesity
36.9%
U.S. 33.3% +3.6 pts
Diabetes
11.9%
U.S. 12.1% about the same
Smoking
13.8%
U.S. 12.8% +1.0 pts
Uninsured (18-64)
7.9%
U.S. 11.1% -3.2 pts
Cities, towns and ZIP codes in Henry County
Population shown
Frequently asked questions
- What is the largest city in Henry County, IL?
- Kewanee is the largest city or town in Henry County, with about 11,913 residents.
- How many ZIP codes are in Henry County?
- Henry County includes 17 ZIP Code Tabulation Areas, including 61233, 61234, 61235, 61238, 61240.
- What is the population of Henry County, IL?
- About 48,643 people live in Henry County, based on American Community Survey 5-year estimates.
- What counties border Henry County?
- Henry County borders Rock Island County, Whiteside County, Knox County, Bureau County, Mercer County, Stark County.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023