Checked
Hamilton County, IL
5 cities and towns and 5 ZIP codes in Hamilton County, Illinois.
Population
7,916
Land area
435sq mi
People per sq mi
18
ZIP codes
5
Cities and towns in Hamilton County
Hamilton County at a glance
- Hamilton County is 92% less dense than Illinois as a whole.
- Households here earn a median of $65,746 a year, 21% less than the Illinois figure of $83,390.
- A typical owner-occupied home is valued at $113,700 (57% below Illinois) and median rent is $568 a month.
- The biggest population centers are McLeansboro (2,675), Dahlgren (595) and Broughton (206).
Local data for Hamilton County, IL
Counts from official public data
Housing and community stats
Hamilton County, IL, American Community Survey 2020-2024
Median household income
$65,746
Poverty rate
12.1%
Median home value
$113,700
Prices +10.4% in a year
Median rent
$568/mo
Homeownership
76.4%
Bachelor's or higher
21.0%
Median age
43.9
Average commute
26.8 min
Largest reported origins and ancestries: German Americans (2,052), Irish Americans (1,080), Scottish Americans (355).
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
$54,838
2,071 jobs, 2025
Income per person
$56,469
BEA, 2024
Federal spending
$53.9M
FY 2026, $6,744 per person
PPP loans
$15.6M
540 loans, 1,945 jobs reported
Campaign donations
$27.9K
Itemized, 2026 cycle
How people get to work
Hamilton County, IL, workers 16 and older. American Community Survey 5-year estimates
- Drove alone89.7%
- Carpooled6.1%
- Public transit0.6%
- Walked0.9%
- Bicycle0.0%
- Taxi, ride-hailing, motorcycle or other0.3%
- Worked from home2.4%
Average one-way commute: 26.8 minutes for people who do not work from home.
Environment and hazard risk
Hamilton County, IL, from FEMA, NOAA and EPA
Natural hazard risk
Very Low
Top: earthquake
Storm events since 1996
638
Most often dense fog
July high / Jan low
89° / 22°F
47.1 inches of rain a year
Hazards, floods and storm historyCheck a flood zone4 historic places
Health statistics
Share of adults in Hamilton County, IL, CDC PLACES estimates
Obesity
40.0%
U.S. 33.3% +6.7 pts
Diabetes
13.9%
U.S. 12.1% +1.8 pts
Smoking
17.0%
U.S. 12.8% +4.2 pts
Uninsured (18-64)
8.3%
U.S. 11.1% -2.8 pts
Cities, towns and ZIP codes in Hamilton County
Population shown
Frequently asked questions
- What is the largest city in Hamilton County, IL?
- McLeansboro is the largest city or town in Hamilton County, with about 2,675 residents.
- How many ZIP codes are in Hamilton County?
- Hamilton County includes 5 ZIP Code Tabulation Areas, including 62817, 62828, 62829, 62859, 62887.
- What is the population of Hamilton County, IL?
- About 7,916 people live in Hamilton County, based on American Community Survey 5-year estimates.
- What counties border Hamilton County?
- Hamilton County borders Franklin County, Jefferson County, Saline County, Wayne County, White County, Gallatin County.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023